TRIMETHYL PHOSPHITE

Trimethyl phosphite is primarily used as an intermediate in pesticides manufacturing and in the production of flame-retardant polymers for polyurethane foams. It also is used as a fireproofing agent in textiles production and as a catalyst (ACGIH, 1991).
It is also used in organic synthesis and as a starting substance for vinyl phosphate synthesis. In addition, trimethyl phosphite is a liquid phosphorous source that is used in the deposition of phosphosilicate glass (HSDB , 1996).

SOURCES

Trimethyl phosphite is produced from a reaction between methanol and phosphorus trichloride in the presence of a tertiary amine (HSDB , 1996).

-CLINICAL EFFECTS

GENERAL CLINICAL EFFECTS

Trimethyl phosphite is a skin, eye, and mucous membrane irritant. It is moderately toxic when ingested. Skin exposure may cause dermatitis. In experimental animals, moderate to severe respiratory distress and severe pulmonary and cutaneous pathology have been noted.

The toxicological data for this chemical is limited.

POTENTIAL HEALTH HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

May cause toxic effects if inhaled or absorbed through skin.
Inhalation or contact with material may irritate or burn skin and eyes.
Fire will produce irritating, corrosive and/or toxic gases.
Vapors may cause dizziness or suffocation.
Runoff from fire control or dilution water may cause pollution.

-MEDICAL TREATMENT

LIFE SUPPORT

Support respiratory and cardiovascular function.

SUMMARY

FIRST AID - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (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.
In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes.
Wash skin with soap and water.
Keep victim warm and quiet.
In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin.
Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed.
Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

FIRST AID

FIRST AID

EYE EXPOSURE - Immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical.
DERMAL EXPOSURE - Immediately flush the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. If irritation persists after washing, get medical attention.
INHALATION EXPOSURE - Move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Get medical attention as soon as possible.
ORAL EXPOSURE - If this chemical has been swallowed, get medical attention immediately.
TARGET ORGANS - Eyes, skin, respiratory tract, and reproductive system (National Institute for Occupational Safety and Health, 2007).

GENERAL -

Move victims of inhalation exposure from the toxic environment and administer 100% humidified supplemental oxygen with assisted ventilation as required. Exposed skin and eyes should be copiously flushed with water. Ingestion may result in significant esophageal or gastrointestinal tract irritation or burns, and EMESIS SHOULD NOT BE INDUCED. Cautious gastric lavage followed by administration of activated charcoal may be of benefit if the patient is seen soon after the exposure.

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.
If bronchospasm and wheezing occur, consider treatment with inhaled sympathomimetic agents.

DERMAL EXPOSURE -

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).
Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

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.

ORAL EXPOSURE -

Because of the potential for gastrointestinal tract irritation, do not induce emesis.
Significant esophageal or gastrointestinal tract irritation or burns may occur following ingestion. The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation.
GASTRIC LAVAGE: Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Protect airway by placement in the head down left lateral decubitus position or by endotracheal intubation. Control any seizures first.

CONTRAINDICATIONS: Loss of airway protective reflexes or decreased level of consciousness in unintubated patients; following ingestion of corrosives; hydrocarbons (high aspiration potential); patients at risk of hemorrhage or gastrointestinal perforation; and trivial or non-toxic ingestion.

ACTIVATED CHARCOAL: Administer charcoal as a slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old.
Observe patients with ingestion carefully for the possible development of esophageal or gastrointestinal tract irritation or burns. If signs or symptoms of esophageal irritation or burns are present, consider endoscopy to determine the extent of injury.

-RANGE OF TOXICITY

MINIMUM LETHAL EXPOSURE

GENERAL/SUMMARY

The minimum lethal human dose to this agent has not been delineated.

ANIMAL DATA

In a trimethyl phosphite inhalational toxicity study, greater than 70% of test rats died after exposure to an airborne concentration of 600 ppm for 6 hours/day, 5 days/week for 4 weeks. After exposure to a concentration of 300 ppm, 10% of the rats died (ACGIH, 1991).

MAXIMUM TOLERATED EXPOSURE

CASE REPORTS

OCCUPATIONAL

No adverse effects were noted in workers in trimethyl phosphite plants in studies where average airborne exposure concentrations were measured at 0.3, 4, and 8 ppm. Some values were as high as 15 ppm (HSDB , 1996).

ANIMAL DATA

Moderate to severe respiratory distress occurred in 5 rats following inhalation exposure to an airborne concentration of 500 (plus or minus 75) ppm of trimethyl phosphite for 7.5 hours/day, 5 days/week for 8 weeks. Body weight gain in the rats was reduced and necropsy revealed severe pulmonary and cutaneous pathology (ACGIH, 1991).

Carcinogenicity Ratings for CAS121-45-9 :

ACGIH (American Conference of Governmental Industrial Hygienists, 2010): Not Listed ; Listed as: Trimethyl phosphite
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): Not Listed
NIOSH (National Institute for Occupational Safety and Health, 2007): Not Listed ; Listed as: Trimethyl phosphite
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 CAS121-45-9 (U.S. Environmental Protection Agency, 2011):

Not Listed

TOXICITY VALUES

References: (Clayton & Clayton, 1994; Lewis, 1996 RTECS, 1996
- LC50- (INHALATION)RAT:
- LD50- (INTRAPERITONEAL)MOUSE:
- LD50- (SKIN)RABBIT:
- LD50- (ORAL)RAT:
- LDLo- (SKIN)RABBIT:
- TDLo- (ORAL)RAT:

CALCULATIONS

AMBIENT CONVERSIONS

CONVERSION FACTORS

1 ppm = 5.16 mg/m(3) (NIOSH , 1996)

-STANDARDS AND LABELS

WORKPLACE STANDARDS

ACGIH TLV Values for CAS121-45-9 (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

Trimethyl phosphite

TLV:

TLV-TWA: 2 ppm
TLV-STEL:
TLV-Ceiling:

Notations and Endnotes:

Carcinogenicity Category: Not Listed
Codes: Not Listed
Definitions: Not Listed

TLV Basis - Critical Effect(s): Eye irr; cholinesterase inhib
Molecular Weight: 124.08

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 CAS121-45-9 (AIHA, 2006):

Not Listed

NIOSH REL and IDLH Values for CAS121-45-9 (National Institute for Occupational Safety and Health, 2007):

Listed as: Trimethyl phosphite
REL:

TWA: 2 ppm (10 mg/m(3))
STEL:
Ceiling:
Carcinogen Listing: (Not Listed) Not Listed
Skin Designation: Not Listed
Note(s):

IDLH: Not Listed

OSHA PEL Values for CAS121-45-9 (U.S. Occupational Safety, and Health Administration (OSHA), 2010):

Not Listed

OSHA List of Highly Hazardous Chemicals, Toxics, and Reactives for CAS121-45-9 (U.S. Occupational Safety and Health Administration, 2010):

Not Listed

ENVIRONMENTAL STANDARDS

EPA CERCLA, Hazardous Substances and Reportable Quantities for CAS121-45-9 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA CERCLA, Hazardous Substances and Reportable Quantities, Radionuclides for CAS121-45-9 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA RCRA Hazardous Waste Number for CAS121-45-9 (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 CAS121-45-9 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA SARA Title III, Community Right-to-Know for CAS121-45-9 (40 CFR 372.65, 2006; 40 CFR 372.28, 2006):

Not Listed

DOT List of Marine Pollutants for CAS121-45-9 (49 CFR 172.101 - App. B, 2005):

Not Listed

EPA TSCA Inventory for CAS121-45-9 (EPA, 2005):

Listed as: Phosphorous acid, trimethyl ester

SHIPPING REGULATIONS

SURFACE

DOT -- Table of Hazardous Materials and Special Provisions for UN/NA Number 2329 (49 CFR 172.101, 2005):

Hazardous materials descriptions and proper shipping name: Trimethyl phosphite

Symbol(s): Not Listed
Hazard class or Division: 3

3: Flammable and combustible liquid. See 49 CFR section 173.120 for definitions.

Identification Number: UN2329
Packing Group: III

III: Packing Group III - indicates the degree of danger presented by the material is minor.

Label(s) required (if not excepted): 3

3: Flammable Liquid.

Special Provisions: B1, IB3, T2, TP1

B1: If the material has a flash point at or above 38 °C (100 °F) and below 93 °C (200 °F), then the bulk packaging requirements of sxn. 173.241 of this subchapter are applicable. If the material has a flash point of less than 38 °C (100 °F), then the bulk packaging requirements of sxn. 173.242 of this subchapter are applicable.
IB3: Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2). Additional Requirement: Only liquids with a vapor pressure less than or equal to 110 kPa at 50 °C (1.1 bar at 122 °F), or 130 kPa at 55 °C (1.3 bar at 131 °F) are authorized, except for UN2672 (also see Special Provision IP8 in Table 3 for UN2672).
T2: Minimum test pressure (bar): 1.5; Minimum shell thickness (in mm-reference steel) (See sxn.178.274(d)): sxn.178.274(d)(2); Pressure-relief requirements (See sxn.178.275(g)): Normal; Bottom opening requirements (See sxn.178.275(d)): sxn.178.275(d)(3).
TP1: The maximum degree of filling must not exceed the degree of filling determined by the following: [Degree of filling = 97/1+alpha(tr - tf)], where tr is the maximum mean bulk temperature during transport, and tf is the temperature in degrees celsius of the liquid during filling.

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

Exceptions: 150
Non-bulk packaging: 203
Bulk packaging: 242

Quantity Limitations:

Passenger aircraft or railcar: 60 L
Cargo aircraft only: 220 L

Vessel Stowage Requirements:

Vessel stowage location: A

A: The material may be stowed "on deck" or "under deck" on a cargo vessel and on a passenger vessel.

Vessel stowage other: Not Listed

ICAO International Shipping Name for UN2329 (ICAO, 2002):

Proper Shipping Name: Trimethyl phosphite
UN Number: 2329

LABELS

NFPA

NFPA Hazard Ratings for CAS121-45-9 (NFPA, 2002):

Listed as: Trimethyl Phosphite
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): 3

(3) Flammable. Liquids and solids that can be ignited under almost all ambient temperature conditions. Including liquids with a flash point below 73 degrees F and a boiling point above 100 degrees F, solid materials which form coarse dusts that burn rapidly without becoming explosive, materials which burn rapidly by reason of self-contained oxygen (ie, organic peroxides), and materials which ignite spontaneously when exposed to 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

-HANDLING AND STORAGE

STORAGE

INCOMPATIBILITIES

Trimethyl phosphite is incompatible with magnesium perchlorate, trimethyl platinum (IV) azide tetramer, and with water (Lewis, 1996; NIOSH , 1996).
- The compound hydrolyzes in water and forms dimethyl phosphite and methanol (ACGIH, 1991).

-PERSONAL PROTECTION

SUMMARY

RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

Wear positive pressure self-contained breathing apparatus (SCBA).
Structural firefighters' protective clothing will only provide limited protection.

EYE/FACE PROTECTION

Approved safety goggles should be used with this substance (CHRIS, 1996).

Wear appropriate eye protection to ensure that this substance does not come into contact with the eyes (NIOSH , 1996).

Should trimethyl phosphite contact the eyes, flush with water for a minimum of 15 minutes (AAR, 1994).

RESPIRATORY PROTECTION

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 121-45-9.

All data are compiled from published sources and are NOT recommended specifically by Truven Health Analytics. The appearance of specific manufacturers or products in this section does not represent an endorsement by Truven Health Analytics. No attempt has been made to verify the data presented. All product recommendations should be confirmed with the specific manufacturer for verification of product performance.
CLOTHING

Plastic Laminate

DuPont Personal Protection

Responder

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): None detected
Notes: Not Listed
Citation: (DuPont, 2002)

Responder Plus

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): None detected
Notes: Not Listed
Citation: (DuPont, 2002)

Tychem 10,000

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): Not Tested
Permeation Rate (mcg/cm2/min): Not Tested
Notes: liquid
Citation: (DuPont, 2002)

Tychem 7500

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): Not Tested
Permeation Rate (mcg/cm2/min): Not Tested
Notes: liquid
Citation: (DuPont, 2002)

Tychem 9400

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): <0.1
Notes: liquid
Citation: (DuPont, 2002)

Tychem BR

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): <0.1
Notes: Not Listed
Citation: (DuPont, 2002)

Tychem LV

Degradation Rating: Not Listed
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): <0.1
Notes: Not Listed
Citation: (DuPont, 2003)

Tychem QC

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): Not Tested
Permeation Rate (mcg/cm2/min): Not Tested
Notes: liquid
Citation: (DuPont, 2002)

Tychem SL

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 0.5
Notes: liquid
Citation: (DuPont, 2002)
Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 0.5
Notes: Not Listed
Citation: (DuPont, 2002)

Tychem TK

Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): <0.1
Notes: liquid
Citation: (DuPont, 2002)
Degradation Rating: No Degradation Rating provided
Breakthrough Time (minutes): >480
Permeation Rate (mcg/cm2/min): <0.1
Notes: Not Listed
Citation: (DuPont, 2002)

FOOTWEAR

Specific recommendations and test data for this product type were not found in the available manufacturers' product literature.

GLOVES

Nitrile

MAPA Spontex, Inc.

Stansolv/A-10

Degradation Rating: Not Tested
Breakthrough Time (minutes): 23.7
Permeation Rate (mcg/cm2/min): 0.1
Notes: 97%
Citation: (MAPA Professional, 2004)

Perfect Fit Glove Co, LLC

Stansolv/A-10CR

Degradation Rating: Not Tested
Breakthrough Time (minutes): 23.7
Permeation Rate (mcg/cm2/min): 0.1
Notes: 97%
Citation: (MAPA Professional, 2003)

Nitrile+Neoprene+Natural Rubber

Perfect Fit Glove Co, LLC

TRIonic 521

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 0.97
Citation: (MAPA Professional, 2003)

TRIonic 522

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 0.97
Citation: (MAPA Professional, 2003)

TRIonic E-194

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 97%
Citation: (MAPA Professional, 2003)

TRIonic E-194BPK

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 97%
Citation: (MAPA Professional, 2003)

TRIonic E-204

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 0.97
Citation: (MAPA Professional, 2003)

TRIonic O-240

Degradation Rating: Not Tested
Breakthrough Time (minutes): 10
Permeation Rate (mcg/cm2/min): 149
Notes: 97%
Citation: (MAPA Professional, 2003)

GENERAL INFORMATION

This section provides a compilation of chemical resistance information and test data for specific protective clothing products. Chemical resistance information includes both degradation resistance ratings and permeation resistance data. This information is designed to assist in the selection of appropriate protective clothing. Only data on specific products and manufacturers are included. Generic information or recommendations are not provided since significant differences can exist in the chemical resistance for apparent similar product types.
Specific product information is organized by general product type (gloves, garments, and footwear), material type, and manufacturer. The category 'garments' may include totally encapsulating suits, splash suits, as well as other items (e.g., coveralls, jackets, and aprons). Specific manufacturers should be contacted to determine the features of available styles/models.
In addition to chemical resistance information, there are many critical variables in the selection of protective clothing which cannot be represented in this summary of the literature. Some factors to be considered in choosing protective clothing include, but are not limited to: overall clothing integrity, physical hazard resistance, durability, human factors, ease of decontamination, and cost. Overall clothing integrity refers to a specific design's ability to offer consistent protection for all clothing-covered areas of the body. Physical hazards include resisting the effects of abrasion, cuts, tears, and punctures. Human factors entail effects on wearer mobility, visibility, and hearing for garments; dexterity, tactility, and grip for gloves; ankle support and weight for footwear; and, any effect of the clothing on the function of the wearer. There are several variations in the design for gloves, garments, and footwear that affect these factors. Protective clothing must properly be sized and correctly fit the wearer to ensure its proper use and function.
As required in the U.S.A., protective clothing should be selected based on a risk assessment of the workplace. This risk assessment must account for the identification of existing as well as potential hazards and involve the recommendation of protective clothing appropriate for the identified hazards. Therefore, the recommendations in this section should not be used as the sole basis for decisions on choice of protective clothing, but rather should be used as a tool by qualified occupational health and safety professionals or other technically qualified persons in conjunction with a review of all mitigating factors. Consult the OSHA PPE Standard (29 CFR 1910.132 - 1910.138) for regulations and additional guidance regarding the selection and use of protective clothing and equipment. For general information on protective clothing selection, refer to the "PERSONAL PROTECTIVE EQUIPMENT - OSHA PUB 3077" document.
PROTECTIVE CLOTHING SELECTION

Determine the type of protective clothing item needed based on a risk assessment (e.g., gloves, garments, footwear).
For high risk situations, choose clothing that covers all parts of the body that may be exposed. In many cases, multiple clothing items will be required. Low risk situations may permit partial body protective clothing. Select protective clothing products that have reported chemical resistance data. High risk situations involving full body clothing or extended chemical contact often require permeation resistance data to determine the barrier effectiveness of materials used in the construction of clothing. Relatively low risk situations, where only splash or incidental exposure occur, may allow use of protective clothing based on degradation or penetration resistance data. Specifics on the interpretation of chemical resistance data are presented below.
Other factors must be considered in addition to chemical resistance. The selected chemical protective clothing item should offer the optimal combination of protection against identified hazards while allowing maximum function and comfort.

INTERPRETATION OF DEGRADATION RATINGS

Degradation refers to physical changes in a material as the result of chemical exposure. Degradation may become evident in visible changes, such as discoloration, swelling, delamination, deterioration, or disintegration. Degradation effects may also be measured by weight change or other changes in a material's physical properties (e.g., strength, elasticity, hardness).
Degradation resistance ratings are provided by manufacturers to rate the amount of degradation that occurs for a particular protective clothing material when contacted by a chemical. All degradation ratings are qualitative and include ratings, such as "EXCELLENT," "GOOD," "FAIR," "POOR," and "NOT RECOMMENDED." There is no standard test method for the measurement of chemical degradation resistance; therefore, manufacturer ratings may be based on different testing approaches. This makes comparison of degradation ratings between manufacturers unreliable.
The use of degradation resistance ratings alone to recommend protective clothing, particularly for high hazard situations, should be avoided. Degradation resistance testing does not directly assess the barrier quality of protective clothing, since materials can show relatively little degradation but still allow either permeation or penetration by a chemical. Degradation resistance ratings can be used to exclude protective clothing materials from consideration. Protective clothing materials with a "NOT RECOMMENDED" degradation resistance rating should never be used.
For some products, the rating "NO PENETRATION" is provided. This refers to penetration resistance test results that are based on a different procedure (American Society for Testing and Materials (ASTM) Standard Test Method F 903). Penetration resistance testing involves placing a material sample in a test cell, exposing the exterior side of the material to a chemical, and then observing the interior side of the material for visible signs of liquid penetration. Part of the test is conducted at an elevated pressure. Test results are reported as pass (no penetration) or fail (penetration detected). Unlike degradation testing, penetration testing provides an assessment of protective clothing material barrier performance. Since penetration resistance testing examines only observable amounts of liquid penetration, permeation may still occur. The use of penetration resistance data must be restricted to liquid chemicals, and should be limited to scenarios where there is no reasonable vapor exposure hazard under the conditions of exposure.

INTERPRETATION OF PERMEATION DATA

Permeation is the process of chemical movement through a material on a molecular level. Permeation resistance refers to the ability of a material to retard or prevent chemical movement through it. Permeation may occur without any visible signs of degradation.
Permeation resistance is measured using a test cell which is divided into two halves by a protective clothing specimen. Chemical is placed on the challenge side, while the collection side is periodically monitored for permeating chemical. Permeation data were obtained in accordance with the American Society for Testing and Materials (ASTM) Standard Test Method F 739 (Resistance of Materials Used in Protective Clothing to Permeation by Liquids and Gases), unless stated otherwise. In the case of chemicals that are classified as warfare agents, the data were obtained in accordance with the Military Standard 282 (MIL-STD-282) (Military Standard, Filter Units, Protective Clothing, Gas-Mask Components, and Related Products: Performance Test Methods).
Permeation rate is the amount of chemical that passes through a material for a measured surface area per unit time. In this section, permeation rate is expressed in micrograms per square centimeter per minute (mcg/cm(2)/min). The reported permeation rate is either the steady-state rate or the maximum rate observed during testing. In some cases, very large permeation rates exceed measurement techniques and are reported as ">" (greater than) or "HIGH."
Breakthrough time is the elapsed time, in minutes, from the time the chemical comes in contact with the material exterior surface, to the time that chemical is detected on the interior surface. When no breakthrough is detected, the breakthrough time is report as ">" the testing period. If permeation breakthrough is rapid, results are reported as "<" (less than) the earlier sampling time or as "IMMEDIATELY" (which usually means breakthrough in less than 4 minutes).
The breakthrough time should exceed the expected use period of the selected protective clothing. Additionally, there are several other factors that must be taken into account to provide appropriate protection.
Permeation testing is usually conducted with full strength, undiluted chemical for the duration of the test period. Actual exposures may involve diluted chemical for short or intermittent exposure periods.
Permeation testing is usually conducted at room temperature. Permeation occurs faster at elevated temperatures (short breakthrough times and higher permeation rates) and slower at reduced temperatures (long breakthrough times and lower permeation rates).
Permeation resistance of mixtures cannot usually be determined on the basis of the individual chemicals making up the mixture. Synergistic effects may occur and result in more rapid permeation than accounted for by the individual mixture chemicals.
Permeation rates may be used to calculate potential wearer exposure; however, several assumptions must be made about the extent of exposure and condition of clothing wear. Furthermore, there are few chemicals with dermal exposure limits, making it difficult to determine an acceptable skin exposure level.

COMPANY INFORMATION

DuPont Personal Protection P. O. Box 80705 Wilmington, DE 19880-0705 USA Phone: (302) 774-1000 Toll-Free: (800) 931-3456 Website: http://personalprotection.dupont.com Email: personalprotection@usa.dupont.com
MAPA Spontex, Inc. 100 Spontex Dr. Columbia, TN 38401 USA Phone: (800) 537--2897 Fax: (800) 537--3299 Website: http://www.mapaglove.com Email: sales@mapaglove.com
Perfect Fit Glove Co, LLC 85 Innsbruck Dr. Buffalo, NY 14227 USA Phone: (800) 245-6837 Fax: (716) 668-3224 Toll-Free: (800) 245-6837 Website: http://www.perfectfitglove.com Email: perfectfitglove@perfectfitglove.com

REFERENCES

CHEMICAL PROTECTIVE CLOTHING CITATIONS

The following sources were consulted for chemical protective clothing data:

(Ansell-Edmont, 2001)
(Bata Shoe Company, 1995)
(Best Manufacturing, 2002)
(Best Manufacturing, 2004)
(Boss Manufacturing Company, 1998)
(ChemFab Corporation, 1993)
(Comasec Safety, Inc., 2003)
(Comasec Safety, Inc., 2003a)
(DuPont, 2002)
(DuPont, 2002)
(DuPont, 2003)
(Guardian Manufacturing Group, 2001)
(ILC Dover, Inc., 1998)
(Kappler Inc., 2001)
(Kimberly-Clark, 2002)
(LaCrosse-Rainfair, 1997)
(MAPA Professional, 2003)
(MAPA Professional, 2004)
(Mar-Mac Manufacturing, Inc, 1995)
(Marigold Industrial, 2003)
(Memphis Glove Company, 2001)
(Montgomery Safety Products, 1995)
(Nat-Wear, 2001)
(Neese Industries, Inc., 2003)
(North, 2002)
(North, 2002)
(Playtex, 1995)
(River City, 1995)
(Safety 4, 2002)
(Servus, 1995)
(Standard Safety Equipment, 1995)
(Tingley, 2002)
(Trelleborg-Viking, Inc., 2001)
(Trelleborg-Viking, Inc., 2002)
(Wells Lamont Industrial, 2002)
(Workrite, 1997)

-PHYSICAL HAZARDS

FIRE HAZARD

SUMMARY

POTENTIAL FIRE OR EXPLOSION HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks).
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a "P" may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
- Many liquids are lighter than water.
Trimethyl phosphite is considered a flammable liquid when exposed to heat, flame, or oxidizers (Lewis, 1996).
The compound poses a moderate fire risk (Lewis, 1993).

FLAMMABILITY CLASSIFICATION

NFPA Flammability Rating for CAS121-45-9 (NFPA, 2002):

Listed as: Trimethyl Phosphite
Flammability Rating: 3

(3) Flammable. Liquids and solids that can be ignited under almost all ambient temperature conditions. Including liquids with a flash point below 73 degrees F and a boiling point above 100 degrees F, solid materials which form coarse dusts that burn rapidly without becoming explosive, materials which burn rapidly by reason of self-contained oxygen (ie, organic peroxides), and materials which ignite spontaneously when exposed to air.

FIRE CONTROL/EXTINGUISHING AGENTS

FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

CAUTION: All these products have a very low flash point: Use of water spray when fighting fire may be inefficient.

SMALL FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

Dry chemical, CO2, water spray or regular foam.

LARGE FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

Water spray, fog or regular foam.
Do not use straight streams.
Move containers from fire area if you can do it without risk.

TANK OR CAR/TRAILER LOAD FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (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.
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 CAS121-45-9 (NFPA, 2002):

Listed as: Trimethyl Phosphite
Extinguishing Method(s): Not Listed

Use of solid water streams may cause fire to spread (AAR, 1994).

Use water from the side to cool containers exposed to flames (CHRIS, 1996).

To fight a large fire in a cargo area, use unmanned hose holders or monitor nozzles; if this is not possible, vacate the area and let the fire burn (CHRIS, 1996).

COMBUSTION TOXICITY

Trimethyl phosphite emits toxic phosphorous oxide fumes when heated to decomposition (Lewis, 1996).

EXPLOSION HAZARD

Violent explosions can occur upon contact with trimethyl phosphite and magnesium perchlorate (Urben, 1995).

Adding trimethyl phosphite to solid trimethylplatinum (IV) azide tetramer caused a violent explosion. This result is probably associated with the transitory by-product, methyl azide (Urben, 1995).

DUST/VAPOR HAZARD

Do not breathe vapors. Stay upwind (AAR, 1994).

The compound is an eye, skin, and upper respiratory system irritant (HSDB , 1996).

REACTIVITY HAZARD

Trimethyl phosphite hydrolizes with water (NIOSH , 1996).

The compound emits highly toxic phosphorus oxide fumes when heated to decomposition (Lewis, 1996).

Violent explosions can occur upon contact between trimethyl phosphite and magnesium perchlorate (Urben, 1995).

Adding trimethyl phosphite to solid trimethylplatinum (IV) azide tetramer caused a violent explosion. This result is probably associated with the transitory by-product, methyl azide (Urben, 1995).

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 130 (ERG, 2004)

Consider initial downwind evacuation for at least 300 meters (1000 feet).

FIRE - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)

If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

PUBLIC SAFETY MEASURES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (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 50 meters (150 feet) in all directions.
Keep unauthorized personnel away.
Stay upwind.
Keep out of low areas.
Ventilate closed spaces before entering.

Issue a high flammability warning; evacuate the area; perform chemical and physical treatment (CHRIS, 1996).

AIHA ERPG Values for CAS121-45-9 (AIHA, 2006):

Not Listed

DOE TEEL Values for CAS121-45-9 (U.S. Department of Energy, Office of Emergency Management, 2010):

Listed as Trimethyl phosphite (TMP)
TEEL-0 (units = ppm): 2
TEEL-1 (units = ppm): 6.1
TEEL-2 (units = ppm): 61
TEEL-3 (units = ppm): 310
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 CAS121-45-9 (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):

Listed as: Trimethylphosphite
Proposed Value:

AEGL-1

10 min exposure:

ppm: 11 ppm
mg/m3: 56 mg/m(3)

30 min exposure:

ppm: 7.6 ppm
mg/m3: 39 mg/m(3)

1 hr exposure:

ppm: 6.1 ppm
mg/m3: 31 mg/m(3)

4 hr exposure:

ppm: 3.8 ppm
mg/m3: 19 mg/m(3)

8 hr exposure:

ppm: 2.5 ppm
mg/m3: 13 mg/m(3)

Definitions:

AEGL-1 is the airborne concentration of a substance above which it is predicted that the general population, including susceptible individuals, could experience notable discomfort, irritation, or certain asymptomatic non-sensory effects. However, the effects are not disabling, are transient, and are reversible upon cessation of exposure.

Listed as: Trimethylphosphite
Proposed Value:

AEGL-2

10 min exposure:

ppm: 110 ppm
mg/m3: 560 mg/m(3)

30 min exposure:

ppm: 77 ppm
mg/m3: 390 mg/m(3)

1 hr exposure:

ppm: 61 ppm
mg/m3: 310 mg/m(3)

4 hr exposure:

ppm: 38 ppm
mg/m3: 190 mg/m(3)

8 hr exposure:

ppm: 25 ppm
mg/m3: 128 mg/m(3)

Definitions:

AEGL-2 is the airborne concentration 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.

Listed as: Trimethylphosphite
Proposed Value:

AEGL-3

10 min exposure:

ppm: 560 ppm
mg/m3: 2900 mg/m(3)

30 min exposure:

ppm: 390 ppm
mg/m3: 2000 mg/m(3)

1 hr exposure:

ppm: 310 ppm
mg/m3: 1600 mg/m(3)

4 hr exposure:

ppm: 160 ppm
mg/m3: 820 mg/m(3)

8 hr exposure:

ppm: 81 ppm
mg/m3: 410 mg/m(3)

Definitions:

AEGL-3 is the airborne concentration of a substance above which it is predicted that the general population, including susceptible individuals, could experience life-threatening health effects or death.

NIOSH IDLH Values for CAS121-45-9 (National Institute for Occupational Safety and Health, 2007):

Not Listed

CONTAINMENT/WASTE TREATMENT OPTIONS

SUMMARY

SPILL OR LEAK PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (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.
- Prevent entry into waterways, sewers, basements or confined areas.
- A vapor suppressing foam may be used to reduce vapors.
- Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.
- Use clean non-sparking tools to collect absorbed material.
RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)
- Wear positive pressure self-contained breathing apparatus (SCBA).
- Structural firefighters' protective clothing will only provide limited protection.
Ensure that trimethyl phosphite does not flow into water sources or sewers (AAR, 1994).
Build dikes, if necessary, to contain the flow of the material (AAR, 1994).

LARGE LEAK/SPILL

LARGE SPILL PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 130 (ERG, 2004)
- Dike far ahead of liquid spill for later disposal.
- Water spray may reduce vapor; but may not prevent ignition in closed spaces.

WASTE TREATMENT OPTIONS

PHYSICAL TREATMENT

"At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices (HSDB , 1996)."
Waste management activities associated with material disposition are unique to individual situations. Proper waste characterization and decisions regarding waste management should be coordinated with the appropriate local, state, or federal authorities to ensure compliance with all applicable rules and regulations.

-ENVIRONMENTAL HAZARD MANAGEMENT

POLLUTION HAZARD

Occupational exposure is the only expected route of human exposure to trimethyl posphite (HSDB, 2003).

ABIOTIC DEGRADATION

No information found at the time of this review.

ENVIRONMENTAL TOXICITY

The effects of low levels of trimethyl phosphite on aquatic life are not known (CHRIS, 1996).

-PHYSICAL/CHEMICAL PROPERTIES

MOLECULAR WEIGHT

124.08 (ACGIH, 1991)

DESCRIPTION/PHYSICAL STATE

Trimethyl phosphite is a clear, colorless liquid. It possesses a strong foul odor (AAR, 1994). Its odor has also been described as irritating, pungent, and oily, and, at higher concentrations, pyridine-like (ACGIH, 1991).

VAPOR PRESSURE

24 mmHg (at 25 degrees C) (saturates in air at 32,000 ppm) (ACGIH, 1991)

SPECIFIC GRAVITY

OTHER TEMPERATURE AND/OR PRESSURE

1.046 (at 20/4 degrees C) (Lewis, 1996)

TEMPERATURE AND/OR PRESSURE NOT LISTED

1.05 (NIOSH , 1996)
1.0+ (NFPA, 1994)

DENSITY

OTHER TEMPERATURE AND/OR PRESSURE

1.046 g/mL (at 20 degrees C) (ACGIH, 1991)
1.05 kg/L (at 20 degrees C) (Ashford, 1994)

FREEZING/MELTING POINT

FREEZING POINT

-108 degrees F (NIOSH , 1996)

MELTING POINT

-78 degrees C (Lewis, 1996)

BOILING POINT

111-112 degrees C (Lewis, 1996)

FLASH POINT

37.8 degrees C (open cup) (ACGIH, 1991)

130 degrees F (open cup) (Lewis, 1996)

82 degrees F (NIOSH , 1996)

EXPLOSIVE LIMITS

LOWER

Unknown (NIOSH , 1996)

UPPER

Unknown (NIOSH , 1996)

SOLUBILITY

IN WATER

Trimethyl phosphite is insoluble in water (decomposes) (ACGIH, 1991).

IN ORGANIC SOLVENTS

It is miscible with acetone, alcohol, benzene, carbon tetrachloride, ether, kerosene, and most common organic solvents (ACGIH, 1991; Lewis, 1993).

SPECTRAL CONSTANTS

5756 (HSDB , 1996)
2:486A (HSDB , 1996)

2-11 (HSDB , 1996)

OTHER/PHYSICAL

ODOR THRESHOLD

Data not available (CHRIS, 1996)

INDEX OF REFRACTION

1.4095 (at 20 degrees C/D); Maximum absorption (alcohol): 251 NM (Log E = 2.76); 257 NM (Log E = 2.80); 263 NM (Log E = 2.66) (HSDB , 1996)

-REFERENCES

GENERAL BIBLIOGRAPHY

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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.

69 FR 54144: 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, 2004.

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TRIMETHYL PHOSPHITE

Classification | Information to evaluate chemical incidents

Information to evaluate chemical incidents

Information to evaluate chemical incidents

Information to evaluate chemical incidents