PROPYLENE

Propylene is a simple asphyxiant, which is generally of a low order of toxicity. Vomiting and vertigo have been described in humans with exposure to high concentrations. Paresthesias and difficulty concentrating, as well as anesthesia at high concentrations, have been noted in exposed humans.

No cardiac effects have been described in humans. The explosive range of airborne concentrations is reached before any physiologic effects are manifested.

Simple asphyxiants displace oxygen from the breathing atmosphere primarily in enclosed spaces and result in hypoxemia. Air hunger, fatigue, decreased vision, mood disturbances, numbness of extremities, headache, confusion, decreased coordination and judgement, cyanosis, and unconsciousness may be noted.

Irritant effects are not seen with vapor exposure.

Direct dermal contact with the compressed or liquid form may cause frostbite injury.

Exposed experimental animals have demonstrated hypotension and tachycardia, with rare ventricular ectopic beats at concentrations of 50 to 80 percent (500,000 to 800,000 ppm). In dogs, inhalation of very high concentrations caused a decrease in the myocardial threshold to the arrhythmogenic activity of injected epinephrine.

In mice, chronic exposure to anesthetic concentrations resulted in mild to moderate fatty degeneration of the liver. Hepatotoxicity in rats only occurs when the animals are pretreated with polychlorinated biphenyls, suggesting that activation of the cytochrome P-450 mixed function oxidase system is necessary for propylene-induced liver injury to occur.

None of these effects have been described in exposed humans.

Propylene has been reviewed by the IARC and placed in group 3. In NTP Carcinogenesis Inhalation Studies, no evidence for carcinogenesis was found in mice and rats.

POTENTIAL HEALTH HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Vapors may cause dizziness or asphyxiation without warning.
Some may be irritating if inhaled at high concentrations.
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
Fire may produce irritating and/or toxic gases.

-MEDICAL TREATMENT

LIFE SUPPORT

Support respiratory and cardiovascular function.

SUMMARY

FIRST AID - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Move victim to fresh air.
Call 911 or emergency medical service.
Give artificial respiration if victim is not breathing.
Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes.
Clothing frozen to the skin should be thawed before being removed.
In case of contact with liquefied gas, thaw frosted parts with lukewarm water.
In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin.
Keep victim warm and quiet.
Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

FIRST AID

GENERAL -

Remove victims of inhalation exposure from the toxic environment and administer 100 percent humidified supplemental oxygen with assisted ventilation as required. Airway protection and maintenance may be required. Copiously flush exposed eyes or skin with water.
Rescuers should wear appropriate respiratory protection when attempting to remove victims from areas with high air concentrations. Be aware of the serious fire and explosion hazard presented by propylene during rescue attempts.
A variety of topical treatments may be appropriate if frostbite has occurred from contact with escaping compressed gas (see below).

INHALATION EXPOSURE -

INHALATION: Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with an inhaled beta2-adrenergic agonist. Consider systemic corticosteroids in patients with significant bronchospasm.
Carefully observe patients with inhalation exposure for the development of any systemic signs or symptoms and administer symptomatic treatment as necessary.
Monitor arterial blood gases and chest x-ray in cases with significant exposure.
Cardiac monitoring may be advisable in cases of significant exposure.
Airway protection and maintenance may be required.
A number of chemicals produce abnormalities of the hematopoietic system, liver, and kidneys. Monitoring complete blood count, urinalysis, and liver and kidney function tests is suggested for patients with significant exposure.

DERMAL EXPOSURE -

PREHOSPITAL

Rewarming of a localized area should only be considered if the risk of refreezing is unlikely. Avoid rubbing the frozen area which may cause further damage to the area (Grieve et al, 2011; Hallam et al, 2010).

REWARMING

Do not institute rewarming unless complete rewarming can be assured; refreezing thawed tissue increases tissue damage. Place affected area in a water bath with a temperature of 40 to 42 degrees Celsius for 15 to 30 minutes until thawing is complete. The bath should be large enough to permit complete immersion of the injured part, avoiding contact with the sides of the bath. A whirlpool bath would be ideal. Some authors suggest a mild antibacterial (ie, chlorhexidine, hexachlorophene or povidone-iodine) be added to the bath water. Tissues should be thoroughly rewarmed and pliable; the skin will appear a red-purple color (Grieve et al, 2011; Hallam et al, 2010; Murphy et al, 2000).
Correct systemic hypothermia which can cause cold diuresis due to suppression of antidiuretic hormone; consider IV fluids (Grieve et al, 2011).
Rewarming may be associated with increasing acute pain, requiring narcotic analgesics.
For severe frostbite, clinical trials have shown that pentoxifylline, a phosphodiesterase inhibitor, can enhance tissue viability by increasing blood flow and reducing platelet activity (Hallam et al, 2010).

WOUND CARE

Digits should be separated by sterile absorbent cotton; no constrictive dressings should be used. Protective dressings should be changed twice per day.
Perform twice daily hydrotherapy for 30 to 45 minutes in warm water at 40 degrees Celsius. This helps debride devitalized tissue and maintain range of motion. Keep the area warm and dry between treatments (Hallam et al, 2010; Murphy et al, 2000).
The injured extremities should be elevated and should not be allowed to bear weight.
In patients at risk for infection of necrotic tissue, prophylactic antibiotics and tetanus toxoid have been recommended by some authors (Hallam et al, 2010; Murphy et al, 2000).
Non-tense clear blisters should be left intact due to the risk of infection; tense or hemorrhagic blisters may be carefully aspirated in a setting where aseptic technique is provided (Hallam et al, 2010).
Further surgical debridement should be delayed until mummification demarcation has occurred (60 to 90 days). Spontaneous amputation may occur.
Analgesics may be required during the rewarming phase; however, patients with severe pain should be evaluated for vasospasm.
IMAGING: Arteriography and noninvasive vascular techniques (e.g., plain radiography, laser Doppler studies, digital plethysmography, infrared thermography, isotope scanning), have been useful in evaluating the extent of vasospasm after thawing and assessing whether debridement is needed (Hallam et al, 2010). In cases of severe frostbite, Technetium 99 (triple phase scanning) and MRI angiography have been shown to be the most useful to assess injury and determine the extent or need for surgical debridement (Hallam et al, 2010).
TOPICAL THERAPY: Topical aloe vera may decrease tissue destruction and should be applied every 6 hours (Murphy et al, 2000).
IBUPROFEN THERAPY: Ibuprofen, a thromboxane inhibitor, may help limit inflammatory damage and reduce tissue loss (Grieve et al, 2011; Murphy et al, 2000). DOSE: 400 mg orally every 12 hours is recommended (Hallam et al, 2010).
THROMBOLYTIC THERAPY: Thrombolysis (intra-arterial or intravenous thrombolytic agents) may be beneficial in those patients at risk to lose a digit or a limb, if done within the first 24 hours of exposure. The use of tissue plasminogen activator (t-PA) to clear microvascular thromboses can restore arterial blood flow, but should be accompanied by close monitoring including angiography or technetium scanning to evaluate the injury and to evaluate the effects of t-PA administration. Potential risk of the procedure includes significant tissue edema that can lead to a rise in interstitial pressures resulting in compartment syndrome (Grieve et al, 2011).
CONTROVERSIAL: Adjunct pharmacological agents (ie, heparin, vasodilators, prostacyclins, prostaglandin synthetase inhibitors, dextran) are controversial and not routinely recommended. The role of hyperbaric oxygen therapy, sympathectomy remains unclear (Grieve et al, 2011).
CHRONIC PAIN: Vasomotor dysfunction can produce chronic pain. Amitriptyline has been used in some patients; some patients may need a referral for pain management. Inability to tolerate the cold (in the affected area) has been observed following a single episode of frostbite (Hallam et al, 2010).
MORBIDITIES: Frostbite can produce localized osteoporosis and possible bone loss following a severe case. These events may take a year or more to develop. Children may be at greater risk to develop more severe events (ie, early arthritis) (Hallam et al, 2010).

DECONTAMINATION: Remove contaminated clothing and jewelry and place them in plastic bags. Wash exposed areas with soap and water for 10 to 15 minutes with gentle sponging to avoid skin breakdown. A physician may need to examine the area if irritation or pain persists (Burgess et al, 1999).

EYE EXPOSURE -

DECONTAMINATION: Remove contact lenses and irrigate exposed eyes with copious amounts of room temperature 0.9% saline or water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist after 15 minutes of irrigation, the patient should be seen in a healthcare facility.
If contact with escaping gas may have caused frostbite of the eyes, early ophthalmologic consultation is advisable.

-RANGE OF TOXICITY

MINIMUM LETHAL EXPOSURE

CONCENTRATION LEVEL

Unconsciousness leading to death will occur when the atmospheric oxygen concentration is reduced to 6% to 8% or less (Kizer, 1984). Signs of asphyxia will be noted when atmospheric oxygen is displaced such that the oxygen concentration is 15% to 16% or less (Kizer, 1984).

MAXIMUM TOLERATED EXPOSURE

CONCENTRATION LEVEL

Unconsciousness leading to death will occur when the atmospheric oxygen concentration is reduced to 6% to 8% or less (Kizer, 1984). Signs of asphyxia will be noted when atmospheric oxygen is displaced such that the oxygen concentration is 15% to 16% or less (Kizer, 1984).
CASE REPORTS

Inhalation of 6.4 percent (64,000 ppm) for a little over 2 minutes caused mild intoxication with difficulty concentrating and paresthesias. Similar, but more accentuated, effects were noted at a concentration of 12.8 percent (128,000 ppm) for one minute.
Inhalation of concentrations of 24 or 33 percent (240,000 or 330,000 ppm) for 3 minutes resulted in unconsciousness, although loss of consciousness was not produced at a concentration of 23 percent (230,000 ppm) for 3 to 4 minutes.
At concentrations of 35 and 40 percent (350,000 and 400,000 ppm), vomiting and vertigo were seen.
At a concentration of 50 percent (500,000 ppm), anesthesia developed in 2 minutes, but was completely reversible on cessation of exposure.
Facial flushing, excessive lacrimation, reddening of the eyelids, coughing, and leg flexion were seen with inhalation of 40, 50, or 75 percent (400,000, 500,000, or 750,000 ppm) for a few minutes, but no effects on the electrocardiogram, respiratory rate, or pulse were produced.
(REFERENCE - Clayton & Clayton, 1982)

ANIMAL DATA

In cats, decreased blood pressure and tachycardia were noted at concentrations of 50 to 80 percent (500,000 to 800,000 ppm), although no signs other than reversible anesthesia were noted at 20 to 31 percent (200,000 to 310,000 ppm) (Clayton & Clayton, 1982).
Rats developed light anesthesia and no other signs when exposed to 40 percent (400,000 ppm), and deep anesthesia without other effects at concentrations of 55, 65, and 70 percent (550,000; 650,000; and 700,000 ppm) for 1 to 6 minutes (Clayton & Clayton, 1982).

Carcinogenicity Ratings for CAS115-07-1 :

ACGIH (American Conference of Governmental Industrial Hygienists, 2010): A4 ; Listed as: Propylene

A4 :Not Classifiable as a Human Carcinogen: Agents which cause concern that they could be carcinogenic for humans but which cannot be assessed conclusively because of a lack of data. In vitro or animal studies do not provide indications of carcinogenicity which are sufficient to classify the agent into one of the other categories.

EPA (U.S. Environmental Protection Agency, 2011): Not Listed
IARC (International Agency for Research on Cancer (IARC), 2016; International Agency for Research on Cancer, 2015; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010a; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2008; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2007; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2006; IARC, 2004): 3 ; Listed as: Propylene

3 : The agent (mixture or exposure circumstance) is not classifiable as to its carcinogenicity to humans. This category is used most commonly for agents, mixtures and exposure circumstances for which the evidence of carcinogenicity is inadequate in humans and inadequate or limited in experimental animals. Exceptionally, agents (mixtures) for which the evidence of carcinogenicity is inadequate in humans but sufficient in experimental animals may be placed in this category when there is strong evidence that the mechanism of carcinogenicity in experimental animals does not operate in humans. Agents, mixtures and exposure circumstances that do not fall into any other group are also placed in this category.

NIOSH (National Institute for Occupational Safety and Health, 2007): Not Listed
MAK (DFG, 2002): Not Listed
NTP (U.S. Department of Health and Human Services, Public Health Service, National Toxicology Project ): Not Listed

TOXICITY AND RISK ASSESSMENT VALUES

EPA IRIS

EPA Risk Assessment Values for CAS115-07-1 (U.S. Environmental Protection Agency, 2011):

Not Listed

-STANDARDS AND LABELS

WORKPLACE STANDARDS

ACGIH TLV Values for CAS115-07-1 (American Conference of Governmental Industrial Hygienists, 2010):

Editor's Note: The listed values are recommendations or guidelines developed by ACGIH(R) to assist in the control of health hazards. They should only be used, interpreted and applied by individuals trained in industrial hygiene. Before applying these values, it is imperative to read the introduction to each section in the current TLVs(R) and BEI(R) Book and become familiar with the constraints and limitations to their use. Always consult the Documentation of the TLVs(R) and BEIs(R) before applying these recommendations and guidelines.

Adopted Value

Propylene

TLV:

TLV-TWA: 500 ppm
TLV-STEL:
TLV-Ceiling:

Notations and Endnotes:

Carcinogenicity Category: A4
Codes: Not Listed
Definitions:

A4: Not Classifiable as a Human Carcinogen: Agents which cause concern that they could be carcinogenic for humans but which cannot be assessed conclusively because of a lack of data. In vitro or animal studies do not provide indications of carcinogenicity which are sufficient to classify the agent into one of the other categories.

TLV Basis - Critical Effect(s): Asphyxia; URT irr
Molecular Weight: 42.08

For gases and vapors, to convert the TLV from ppm to mg/m(3):

[(TLV in ppm)(gram molecular weight of substance)]/24.45

For gases and vapors, to convert the TLV from mg/m(3) to ppm:

[(TLV in mg/m(3))(24.45)]/gram molecular weight of substance

AIHA WEEL Values for CAS115-07-1 (AIHA, 2006):

Not Listed

NIOSH REL and IDLH Values for CAS115-07-1 (National Institute for Occupational Safety and Health, 2007):

Not Listed

OSHA PEL Values for CAS115-07-1 (U.S. Occupational Safety, and Health Administration (OSHA), 2010):

Not Listed

OSHA List of Highly Hazardous Chemicals, Toxics, and Reactives for CAS115-07-1 (U.S. Occupational Safety and Health Administration, 2010):

Not Listed

ENVIRONMENTAL STANDARDS

EPA CERCLA, Hazardous Substances and Reportable Quantities for CAS115-07-1 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA CERCLA, Hazardous Substances and Reportable Quantities, Radionuclides for CAS115-07-1 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA RCRA Hazardous Waste Number for CAS115-07-1 (U.S. Environmental Protection Agency, 2010b):

Not Listed
Editor's Note: The D, F, and K series waste numbers and Appendix VIII to Part 261 -- Hazardous Constituents were not included. Please refer to 40 CFR Part 261.

EPA SARA Title III, Extremely Hazardous Substance List for CAS115-07-1 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA SARA Title III, Community Right-to-Know for CAS115-07-1 (40 CFR 372.65, 2006; 40 CFR 372.28, 2006):

Listed as: Propylene (Propene)
Effective Date for Reporting Under 40 CFR 372.30: 1/1/87
Lower Thresholds for Chemicals of Special Concern under 40 CFR 372.28:

DOT List of Marine Pollutants for CAS115-07-1 (49 CFR 172.101 - App. B, 2005):

Not Listed

EPA TSCA Inventory for CAS115-07-1 (EPA, 2005):

Not Listed

SHIPPING REGULATIONS

SURFACE

DOT -- Table of Hazardous Materials and Special Provisions for UN/NA Number 1075 (49 CFR 172.101, 2005):

Hazardous materials descriptions and proper shipping name: Petroleum gases, liquefied or Liquefied petroleum gas

Symbol(s): Not Listed
Hazard class or Division: 2.1

2.1: Flammable gas. See 49 CFR section 173.115 for definitions.

Identification Number: UN1075
Packing Group: Not Listed
Label(s) required (if not excepted): 2.1

2.1: Flammable Gas.

Special Provisions: T50

T50: Applicable liquefied compressed gases are authorized to be transported in portable tanks in accordance with the requirements of sxn. 173.313 of this subchapter.

Packaging Authorizations (refer to 49 CFR 173.***):

Exceptions: 306
Non-bulk packaging: 304
Bulk packaging: 314, 315

Quantity Limitations:

Passenger aircraft or railcar: Forbidden
Cargo aircraft only: 150 kg

Vessel Stowage Requirements:

Vessel stowage location: E

E: The material may be stowed "on deck" or "under deck" on a cargo vessel and on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length, but is prohibited from carriage on passenger vessels in which the limiting number of passengers is exceeded.

Vessel stowage other: 40

40: Stow "clear of living quarters".

DOT -- Table of Hazardous Materials and Special Provisions for UN/NA Number 1077 (49 CFR 172.101, 2005):

Hazardous materials descriptions and proper shipping name: Propylene see also Petroleum gases, liquefied

Symbol(s): Not Listed
Hazard class or Division: 2.1

2.1: Flammable gas. See 49 CFR section 173.115 for definitions.

Identification Number: UN1077
Packing Group: Not Listed
Label(s) required (if not excepted): 2.1

2.1: Flammable Gas.

Special Provisions: 19, T50

19: For domestic transportation only, the identification number "UN1075" may be used in place of the identification number specified in column (4) of the sxn. 172.101 table. The identification number used must be consistent on package markings, shipping papers and emergency response information.
T50: Applicable liquefied compressed gases are authorized to be transported in portable tanks in accordance with the requirements of sxn. 173.313 of this subchapter.

Packaging Authorizations (refer to 49 CFR 173.***):

Exceptions: 306
Non-bulk packaging: 304
Bulk packaging: 314, 315

Quantity Limitations:

Passenger aircraft or railcar: Forbidden
Cargo aircraft only: 150 kg

Vessel Stowage Requirements:

Vessel stowage location: E

E: The material may be stowed "on deck" or "under deck" on a cargo vessel and on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length, but is prohibited from carriage on passenger vessels in which the limiting number of passengers is exceeded.

Vessel stowage other: 40

40: Stow "clear of living quarters".

ICAO International Shipping Name for UN1075 (ICAO, 2002):

Proper Shipping Name: Petroleum gases, liquefied
UN Number: 1075

ICAO International Shipping Name for UN1077 (ICAO, 2002):

Proper Shipping Name: Propylene
UN Number: 1077

LABELS

NFPA

NFPA Hazard Ratings for CAS115-07-1 (NFPA, 2002):

Listed as: Propylene
Hazard Ratings:

Health Rating (Blue): 1

(1) Slightly toxic material. May cause irritation, but only minor residual injury even without treatment. Recognized innocuous materials when used with responsible care.

Flammability Rating (Red): 4

(4) Extremely flammable. Materials which will rapidly vaporize at normal pressure and temperature and will burn readily. Including: gases, cryogenic materials, any liquid or gaseous material having a flash point below 73 degrees F and a boiling point below 100 degrees F, and materials which can form explosive mixtures with air.

Instability Rating (Yellow): 1

(1) Materials which are normally stable, but which can become unstable at elevated temperatures and pressures, or which may react with water with some release of energy, but not violently.

Oxidizer/Water-Reactive Designation: Not Listed

-PERSONAL PROTECTION

SUMMARY

RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Wear positive pressure self-contained breathing apparatus (SCBA).
Structural firefighters' protective clothing will only provide limited protection.
Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.

Avoid breathing the vapors from this material and do not attempt to handle broken or leaking containers without proper protective equipment (AAR, 1987). Fires involving this material should be approached only with caution (AAR, 1987).

For normal handling, a face shield, rubber gloves, overalls, and an all-purpose gas mask should be worn (Sittig, 1985; ITI, 1985).

Adequate ventilation should be assured (ITI, 1985). A supplied-air respirator should be used if necessary (ITI, 1985).
Appropriate protective goggles and gloves should be worn (AAR, 1987).

An organic vapor canister or supplied-air respirator, goggles or a face shield, and protective clothing should be worn (CHRIS , 1985).

RESPIRATORY PROTECTION

For normal handling, a face shield, rubber gloves, overalls, and an all-purpose gas mask should be worn (Sittig, 1985; ITI, 1985).

Adequate ventilation should be assured (ITI, 1985). A supplied-air respirator should be used if necessary (ITI, 1985).
Propylene is an asphyxiant (Patnaik, 1992). Therefore, adequate oxygen should be provided.

An organic vapor canister or supplied-air respirator, goggles or a face shield, and protective clothing should be worn (CHRIS , 1985).

Refer to "Recommendations for respirator selection" in the NIOSH Pocket Guide to Chemical Hazards on TOMES Plus(R) for respirator information.

PROTECTIVE CLOTHING

CHEMICAL PROTECTIVE CLOTHING. Search results for CAS 115-07-1.

Specific recommendations and test data for this chemical were not found in the available manufacturers' product literature. A complete list of consulted manufacturers and references is presented below.

-PHYSICAL HAZARDS

FIRE HAZARD

SUMMARY

POTENTIAL FIRE OR EXPLOSION HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)
- EXTREMELY FLAMMABLE.
- Will be easily ignited by heat, sparks or flames.
- Will form explosive mixtures with air.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- CAUTION: Hydrogen (UN1049), Deuterium (UN1957) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.)
- Vapors may travel to source of ignition and flash back.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
Propylene is flammable and easily ignited by heat, flames, or sparks (AAR, 1987; CHRIS , 1985). It is a very dangerous fire hazard, especially if exposed to oxidizing substances, heat, or flames (Sax & Lewis, 1989).
- All sources of ignition, such as flares, smoking, sparks, and flames, should be kept away from this material (AAR, 1987).
- All possible sources of ignition should be shut off (CHRIS , 1985).
- Propylene vapors are heavier than air (AAR, 1987; NFPA, 1986). The vapors can travel a considerable distance to an ignition source and flash back over the vapor trail (AAR, 1987; ITI, 1985; NFPA, 1986; CHRIS , 1985).
Leaking material may be either vapor or liquid (AAR, 1987).
Fires involving this material should not be extinguished unless the flow of leaking material can be stopped (AAR, 1987; CHRIS , 1985).
- Water may be used in flooding amounts as fog (AAR, 1987).
Containers that are exposed to the heat of a fire should be cooled from the side with flooding amounts of water until well after the fire is extinguished (AAR, 1987; CHRIS , 1985).
- Water should be applied from as far away as possible.
Containers should be moved from the area of the fire and leaks stopped if this can be done without undue risk (AAR, 1987; NFPA, 1986; CHRIS , 1985).
- Water spray may be used to protect personnel attempting to move containers and stop leaks (ITI, 1985; NFPA, 1986; CHRIS , 1985).
DOT Evaluation (RTECS , 1989)
- DOT-Hazard: Flammable Gas
- Label: Flammable Gas
DOT-IMO Evaluation (RTECS , 1989)
- DOT-IMO Hazard: Flammable Gas
- Label: Flammable Gas
NFPA Hazard Identification (NFPA, 1986)
- Health: 1
- Flammability: 4
- Reactivity: 1

FLAMMABILITY CLASSIFICATION

NFPA Flammability Rating for CAS115-07-1 (NFPA, 2002):

Listed as: Propylene
Flammability Rating: 4

(4) Extremely flammable. Materials which will rapidly vaporize at normal pressure and temperature and will burn readily. Including: gases, cryogenic materials, any liquid or gaseous material having a flash point below 73 degrees F and a boiling point below 100 degrees F, and materials which can form explosive mixtures with air.

FIRE CONTROL/EXTINGUISHING AGENTS

FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.
CAUTION: Hydrogen (UN1049) and Deuterium (UN1957) burn with an invisible flame.

SMALL FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Dry chemical or CO2.

LARGE FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Water spray or fog.
Move containers from fire area if you can do it without risk.

TANK FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Fight fire from maximum distance or use unmanned hose holders or monitor nozzles.
Cool containers with flooding quantities of water until well after fire is out.
Do not direct water at source of leak or safety devices; icing may occur.
Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.
ALWAYS stay away from tanks engulfed in fire.
For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

NFPA Extinguishing Methods for CAS115-07-1 (NFPA, 2002):

Listed as: Propylene
Extinguishing Method(s): 6

6: Flammable gas fires are only safe to extinguish once the gas flow has been turned off. Attempting to fight a gas fire without turning off the gas can cause formation of an explosive gas cloud.

Fires involving this material should not be extinguished unless the flow of leaking material can be stopped (AAR, 1987; CHRIS , 1985).

Stopping the flow of leaking gas is an important fire fighting step (ITI, 1985; NFPA, 1986; Sax & Lewis, 1989; CHRIS , 1985).

Water may be used in flooding amounts as fog (AAR, 1987).

COMBUSTION TOXICITY

Propylene is a combustion product of polyvinyl chloride (Clayton & Clayton, 1982).
Exposure to the vapors from this material may cause dizziness, unconsciousness, or suffocation (CHRIS , 1985).

EXPLOSION HAZARD

Containers that are exposed to the heat of a fire may explode (CHRIS , 1985).

Cylinders or tank cars may rupture and rocket if exposed to fire conditions (AAR, 1987).

Propylene forms explosive mixtures with air (ITI, 1985).

Propylene presents a vapor explosion hazard indoors, outdoors, and in sewers, especially when exposed to heat or flames (Sax & Lewis, 1989).

Propylene vapors may explode if they are ignited in an enclosed space (CHRIS , 1985).

Propylene may have hazardous or explosive reactions (See Below Under REACTIVITY HAZARD).

In unusual conditions of 955 atmospheres pressure and at 327 degrees C temperature, propylene may explode (Sax & Lewis, 1989).

DUST/VAPOR HAZARD

Exposure to the vapors from this material may cause dizziness, unconsciousness, or suffocation (CHRIS , 1985).

REACTIVITY HAZARD

Propylene forms explosive mixtures with air (ITI, 1985; NFPA, 1986).

Propylene is a combustion product of polyvinyl chloride (Clayton & Clayton, 1982).

Propylene may have hazardous or explosive reactions with (NFPA, 1986):

Nitrogen dioxide
Nitrogen tetroxide
Nitrous oxide

Propylene may have hazardous or explosive reactions with (Sax & Lewis, 1989):

Trifluoromethyl hypofluorite (explodes on contact)
Lithium nitrate + sulfur dioxide (excessive polymerization)
Oxides of nitrogen (forms explosive products)
Oxidizing materials (vigorous reaction)

Propylene does not react with water or common materials (CHRIS , 1985). It is stable during transport (CHRIS , 1985).

EVACUATION PROCEDURES

SUMMARY

Editor's Note: This material is not listed in the Table of Initial Isolation and Protective Action Distances.

LARGE SPILL - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

Consider initial downwind evacuation for at least 800 meters (1/2 mile).

FIRE - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

If tank, rail car or tank truck is involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions.

PUBLIC SAFETY MEASURES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)

CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number:

MEXICO:

SETIQ:

01-800-00-214-00 in the Mexican Republic;
For calls originating in Mexico City and the Metropolitan Area: 5559-1588;
For calls originating elsewhere, call: 011-52-555-559-1588.

CENACOM:

01-800-00-413-00 in the Mexican Republic;
For calls originating in Mexico City and the Metropolitan Area: 5550-1496, 5550-1552, 5550-1485, or 5550-4885;
For calls originating elsewhere, call: 011-52-555-550-1496, or 011-52-555-550-1552; 011-52-555-550-1485, or 011-52-555-550-4885.

ARGENTINA:

CIQUIME:

0-800-222-2933 in the Republic of Argentina;
For calls originating elsewhere, call: +54-11-4613-1100.

BRAZIL:

PRÓ-QUÍMICA:

0-800-118270 (Toll-free in Brazil);
For calls originating elsewhere, call: +55-11-232-1144 (Collect calls are accepted).

COLUMBIA:

CISPROQUIM:

01-800-091-6012 in Colombia;
For calls originating in Bogotá, Colombia, call: 288-6012;
For calls originating elsewhere, call: 011-57-1-288-6012.

CANADA:

CANUTEC:

613-996-6666 (Collect calls are accepted);
*666 cellular (in Canada only).

UNITED STATES:

CHEMTREC®:

1-800-424-9300 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
703-527-3887 for calls originating elsewhere (Collect calls are accepted).

CHEM-TEL, INC.:

1-800-255-3924 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
813-248-0585 for calls originating elsewhere (Collect calls are accepted).

INFOTRAC:

1-800-535-5053 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
352-323-3500 for calls originating elsewhere (Collect calls are accepted).

3E COMPANY:

1-800-451-8346 (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
760-602-8703 for calls originating elsewhere (Collect calls are accepted).

NATIONAL RESPONSE CENTER (NRC):

1-800-424-8802 - (24 hours) (Toll-free in the U.S., Canada, and the U.S. Virgin Islands);
202-267-2675 for calls in the District of Columbia.

MILITARY SHIPMENTS:

703-697-0218 - Explosives/ammunition incidents (Collect calls are accepted);
1-800-851-8061 - All other dangerous goods incidents.

NATIONWIDE POISON CONTROL CENTER (United States only):

1-800-222-1222 (Toll-free in the U.S.).

For additional details see the section entitled "WHO TO CALL FOR ASSISTANCE" under the ERG Instructions.
As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions.
Keep unauthorized personnel away.
Stay upwind.
Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks).
Keep out of low areas.

The hazard area should be isolated and entry denied to unnecessary persons (CHRIS , 1985).

Stay upwind of fires, spills, and leaks involving this material, and keep out of low-lying areas (AAR, 1987; CHRIS , 1985).

Consider evacuating an area one-half mile in radius if a fire becomes uncontrollable or if a container is directly exposed to flames (AAR, 1987).

If a large discharge of this material occurs, the area should be evacuated (CHRIS , 1985).

Evacuating in a downwind direction should be considered if this material is leaking but not on fire, with the area determined by such factors as the amount of material spilled, weather conditions, and the location (AAR, 1987).

AIHA ERPG Values for CAS115-07-1 (AIHA, 2006):

Not Listed

DOE TEEL Values for CAS115-07-1 (U.S. Department of Energy, Office of Emergency Management, 2010):

Listed as Propylene (1-Propene)
TEEL-0 (units = ppm): 500
TEEL-1 (units = ppm): 1500
TEEL-2 (units = ppm): 10000
TEEL-3 (units = ppm): 20000
Definitions:

TEEL-0: The threshold concentration below which most people will experience no adverse health effects.
TEEL-1: The airborne concentration (expressed as ppm [parts per million] or mg/m(3) [milligrams per cubic meter]) of a substance above which it is predicted that the general population, including susceptible individuals, could experience notable discomfort, irritation, or certain asymptomatic, nonsensory effects. However, these effects are not disabling and are transient and reversible upon cessation of exposure.
TEEL-2: The airborne concentration (expressed as ppm or mg/m(3)) of a substance above which it is predicted that the general population, including susceptible individuals, could experience irreversible or other serious, long-lasting, adverse health effects or an impaired ability to escape.
TEEL-3: The airborne concentration (expressed as ppm or mg/m(3)) of a substance above which it is predicted that the general population, including susceptible individuals, could experience life-threatening adverse health effects or death.

AEGL Values for CAS115-07-1 (National Research Council, 2010; National Research Council, 2009; National Research Council, 2008; National Research Council, 2007; NRC, 2001; NRC, 2002; NRC, 2003; NRC, 2004; NRC, 2004; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; United States Environmental Protection Agency Office of Pollution Prevention and Toxics, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2009; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2008; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2007; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2005; National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances, 2006; 62 FR 58840, 1997; 65 FR 14186, 2000; 65 FR 39264, 2000; 65 FR 77866, 2000; 66 FR 21940, 2001; 67 FR 7164, 2002; 68 FR 42710, 2003; 69 FR 54144, 2004):

Not Listed

NIOSH IDLH Values for CAS115-07-1 (National Institute for Occupational Safety and Health, 2007):

Not Listed

CONTAINMENT/WASTE TREATMENT OPTIONS

SUMMARY

SPILL OR LEAK PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)
- ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).
- All equipment used when handling the product must be grounded.
- Do not touch or walk through spilled material.
- Stop leak if you can do it without risk.
- If possible, turn leaking containers so that gas escapes rather than liquid.
- Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material.
- Do not direct water at spill or source of leak.
- Prevent spreading of vapors through sewers, ventilation systems and confined areas.
- Isolate area until gas has dispersed.
- CAUTION: When in contact with refrigerated/cryogenic liquids, many materials become brittle and are likely to break without warning.
RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 115 (ERG, 2004)
- Wear positive pressure self-contained breathing apparatus (SCBA).
- Structural firefighters' protective clothing will only provide limited protection.
- Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Water spray may be used to reduce or knock down vapors (AAR, 1987; CHRIS , 1985).
Controlled incineration has been suggested as a disposal method (Sittig, 1985).

SMALL LEAK/SPILL

Use forced ventilation to keep the concentration of propylene below its explosive range in air (ITI, 1985). The container can then be moved to an open area and the leaking propylene allowed to bleed off into the atmosphere (ITI, 1985).

LARGE LEAK/SPILL

Controlled incineration has been suggested as a disposal method (Sittig, 1985).
- A pipeline can be fitted into a furnace or pit and the propylene carefully burned in a controlled manner (ITI, 1985).

-ENVIRONMENTAL HAZARD MANAGEMENT

POLLUTION HAZARD

No information found at the time of this review.

ABIOTIC DEGRADATION

No information found at the time of this review.

BIOACCUMULATION

OTHER

OTHER
- Propylene does not concentrate in the food chain (CHRIS , 1985).

ENVIRONMENTAL TOXICITY

Propylene is not harmful to aquatic life or waterfowl, and has no Biological Oxygen Demand (BOD) (CHRIS , 1985).

Propylene should be kept out of sewers and water sources (AAR, 1987).

Local health and pollution control authorities should be notified of releases (CHRIS , 1985).

-PHYSICAL/CHEMICAL PROPERTIES

MOLECULAR WEIGHT

42.09 (RTECS , 1989)

DESCRIPTION/PHYSICAL STATE

Propylene is a flammable, volatile, colorless gas with a faint petroleum-like or "gassy" odor, which may also be practically odorless (AAR, 1987; Sittig, 1985; ITI, 1985; Clayton & Clayton, 1982; NFPA, 1986; Sax & Lewis, 1987; CHRIS , 1985). It may be stenched for transportation, and is shipped as a liquified gas under its vapor pressure (AAR, 1987; Clayton & Clayton, 1982; NFPA, 1986).

Lower alkanes and alkenes may be trace impurities in liquified propylene (Clayton & Clayton, 1982).
Propylene is available in grades of purity of 95 and 99% (Sax & Lewis, 1987).

Chemical grade is 92+%; Polymerization grade is 99+%; Research grade is 99+%; and Propylene Concentrate grade is 80+%(CHRIS , 1985).

Liquified propylene floats on and boils on water, producing a visible and flammable vapor cloud (CHRIS , 1985).

VAPOR PRESSURE

10 atm (at 19.8 degrees C) (Sax & Lewis, 1989)

SPECIFIC GRAVITY

OTHER TEMPERATURE AND/OR PRESSURE

0.5139 (at 20/4 degrees C) (Sax & Lewis, 1987)

DENSITY

STANDARD TEMPERATURE AND PRESSURE

(0 degrees C; 32 degrees F and 760 mmHg)
0.581 g/cm(3) (Sax & Lewis, 1989)

OTHER TEMPERATURE AND/OR PRESSURE

0.51 g/cm(3) (at 20 degrees C) (ITI, 1985)
0.609 g/cm(3) (at -47 degrees C) (CHRIS , 1985)

FREEZING/MELTING POINT

FREEZING POINT

-185.2 degrees C; -301.4 degrees F (Sax & Lewis, 1987; CHRIS , 1985)

MELTING POINT

-185.2 degrees C (ITI, 1985)
-185 degrees C (Sax & Lewis, 1989)

BOILING POINT

-47.7 degrees C; -53.9 degrees F (ITI, 1985; Sax & Lewis, 1989; Sax & Lewis, 1987) CHRIS, 1987)

-47 degrees C; -53 degrees F (NFPA, 1986)

FLASH POINT

-108 degrees C; -162 degrees F (ITI, 1985; Sax & Lewis, 1989; Sax & Lewis, 1987; CHRIS , 1985)

AUTOIGNITION TEMPERATURE

497 degrees C; 927 degrees F (ITI, 1985; NFPA, 1986; Sax & Lewis, 1987; CHRIS , 1985)

455 degrees C; 851 degrees F (NFPA, 1986)

860 degrees F (Sax & Lewis, 1989)

EXPLOSIVE LIMITS

LOWER

2.4% (Sax & Lewis, 1989)
2% (Sax & Lewis, 1987)

UPPER

10.1% (Sax & Lewis, 1989)
11% (Sax & Lewis, 1987)
11.1% (NFPA, 1986)

SOLUBILITY

IN WATER

Propylene is slightly soluble in water (ITI, 1985; NFPA, 1986; Sax & Lewis, 1987).

IN ORGANIC SOLVENTS

Propylene is soluble in ether and alcohol (ITI, 1985; Sax & Lewis, 1987).

-REFERENCES

GENERAL BIBLIOGRAPHY

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65 FR 39264: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2000.

65 FR 77866: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2000.

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67 FR 7164: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2002.

68 FR 42710: Notice of the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances - Proposed AEGL Values, Environmental Protection Agency, NAC/AEGL Committee. National Archives and Records Administration (NARA) and the Government Publishing Office (GPO), Washington, DC, 2003.

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National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Biphenyl (Proposed). United States Environmental Protection Agency. Washington, DC. 2005j. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064801ea1b7&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Bis-Chloromethyl Ether (BCME) (Proposed). United States Environmental Protection Agency. Washington, DC. 2006n. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648022db11&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Boron Tribromide (Proposed). United States Environmental Protection Agency. Washington, DC. 2008a. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064803ae1d3&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Bromine Chloride (Proposed). United States Environmental Protection Agency. Washington, DC. 2007d. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648039732a&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Bromoacetone (Proposed). United States Environmental Protection Agency. Washington, DC. 2008e. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064809187bf&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Calcium Phosphide (Proposed). United States Environmental Protection Agency. Washington, DC. 2005d. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020c5ed&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Carbonyl Fluoride (Proposed). United States Environmental Protection Agency. Washington, DC. 2008b. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064803ae328&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Carbonyl Sulfide (Proposed). United States Environmental Protection Agency. Washington, DC. 2007e. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648037ff26&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Chlorobenzene (Proposed). United States Environmental Protection Agency. Washington, DC. 2008c. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064803a52bb&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Cyanogen (Proposed). United States Environmental Protection Agency. Washington, DC. 2008f. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064809187fe&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Dimethyl Phosphite (Proposed). United States Environmental Protection Agency. Washington, DC. 2009. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480a7cbf3&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Diphenylchloroarsine (Proposed). United States Environmental Protection Agency. Washington, DC. 2007l. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020fd29&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Ethyl Isocyanate (Proposed). United States Environmental Protection Agency. Washington, DC. 2008h. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648091884e&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Ethyl Phosphorodichloridate (Proposed). United States Environmental Protection Agency. Washington, DC. 2008i. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480920347&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Ethylbenzene (Proposed). United States Environmental Protection Agency. Washington, DC. 2008g. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064809203e7&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Ethyldichloroarsine (Proposed). United States Environmental Protection Agency. Washington, DC. 2007j. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020fd29&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Germane (Proposed). United States Environmental Protection Agency. Washington, DC. 2008j. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480963906&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Hexafluoropropylene (Proposed). United States Environmental Protection Agency. Washington, DC. 2006. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064801ea1f5&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Ketene (Proposed). United States Environmental Protection Agency. Washington, DC. 2007. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020ee7c&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Magnesium Aluminum Phosphide (Proposed). United States Environmental Protection Agency. Washington, DC. 2005h. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020c5ed&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Magnesium Phosphide (Proposed). United States Environmental Protection Agency. Washington, DC. 2005g. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020c5ed&disposition=attachment&contentType=pdf. As accessed 2010-08-16.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Malathion (Proposed). United States Environmental Protection Agency. Washington, DC. 2009k. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064809639df&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Mercury Vapor (Proposed). United States Environmental Protection Agency. Washington, DC. 2009b. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480a8a087&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Methyl Isothiocyanate (Proposed). United States Environmental Protection Agency. Washington, DC. 2008k. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480963a03&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Methyl Parathion (Proposed). United States Environmental Protection Agency. Washington, DC. 2008l. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=0900006480963a57&disposition=attachment&contentType=pdf. As accessed 2010-08-12.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Methyl tertiary-butyl ether (Proposed). United States Environmental Protection Agency. Washington, DC. 2007a. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=09000064802a4985&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances: Acute Exposure Guideline Levels (AEGLs) for Methylchlorosilane (Proposed). United States Environmental Protection Agency. Washington, DC. 2005. Available from URL: http://www.regulations.gov/search/Regs/contentStreamer?objectId=090000648020c5f4&disposition=attachment&contentType=pdf. As accessed 2010-08-15.

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Information to evaluate chemical incidents

Information to evaluate chemical incidents

Information to evaluate chemical incidents