OXYGEN DIFLUORIDE

It reacts explosively with even mild reducing agents, and is used as an oxidizer for rocket propellants (ACGIH, 1986; HSDB , 1991).
Oxygen difluoride is a very strong oxidizing agent used in the preparation of complex fluorides (Raffle, 1987).

FORMS

Oxygen difluoride is an unstable, colorless gas with a foul odor; it is yellowish-brown when a liquid (Sax & Lewis, 1987; Sax & Lewis, 1989; Budavari, 1989; ACGIH, 1986).

SOURCES

Oxygen difluoride is prepared by passing fluorine slowly through an aqueous NaOH solution (Budavari, 1989).

-CLINICAL EFFECTS

GENERAL CLINICAL EFFECTS

The toxicity of oxygen difluoride resembles that of ozone, with additional fluoride gas effects. The primary acute effects seen will be irritation of the eyes and lungs with mild CNS depression.

Delayed signs seen may include pulmonary edema and pulmonary hemorrhages.

POTENTIAL HEALTH HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)

TOXIC; may be fatal if inhaled or absorbed through skin.
Fire will produce irritating, corrosive and/or toxic gases.
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
Runoff from fire control may cause pollution.

-MEDICAL TREATMENT

LIFE SUPPORT

Support respiratory and cardiovascular function.

SUMMARY

FIRST AID - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)

Move victim to fresh air.
Call 911 or emergency medical service.
Give artificial respiration if victim is not breathing.
Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
Administer oxygen if breathing is difficult.
Clothing frozen to the skin should be thawed before being removed.
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.
Keep victim warm and quiet.
Keep victim under observation.
Effects of contact or inhalation may be delayed.
Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

FIRST AID

GENERAL -

The primary toxic target-organs are the lungs, kidneys and mucous membranes. Toxicity may be delayed, especially pulmonary effects. Patients may need to be monitored for up to 60 hours after exposure; animals develop symptoms 9 to 66 hours post-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.
ACUTE LUNG INJURY: Maintain ventilation and oxygenation and evaluate with frequent arterial blood gases and/or pulse oximetry monitoring. Early use of PEEP and mechanical ventilation may be needed.

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).

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 oxygen difluoride is normally a gas, ingestion is unlikely.

-RANGE OF TOXICITY

MINIMUM LETHAL EXPOSURE

GENERAL/SUMMARY

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

MAXIMUM TOLERATED EXPOSURE

GENERAL/SUMMARY

The maximum tolerated human exposure to this agent has not been delineated.

CONCENTRATION LEVEL

In its resemblance to ozone, inhalation of oxygen difluoride at fractions of a part per million produced an intractable headache in persons performing tests; was soporific and an irritant to the entire respiratory tract, resulting in pulmonary edema and hemorrhage at all concentrations above 0.5 ppm in exposures of animals for a few hour's duration (ACGIH, 1986).
A sharp cut-off in effect was noted below 0.5 ppm. Thirty day, daily repeated exposure to 0.1 ppm oxygen difluoride of 5 species of animals, including 1 non-rodent species showed no detectable effects by any of several tests applied (ACGIH, 1986).

Carcinogenicity Ratings for CAS7783-41-7 :

ACGIH (American Conference of Governmental Industrial Hygienists, 2010): Not Listed ; Listed as: Oxygen difluoride
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: Oxygen difluoride
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 CAS7783-41-7 (U.S. Environmental Protection Agency, 2011):

Not Listed

TOXICITY VALUES

References: Budavari, 1989 HSDB, 1991 Proctor et al, 1988 RTECS, 1991
- LC50- (INHALATION)DOG:
- LC50- (INHALATION)MOUSE:
- LC50- (INHALATION)PRIMATE:
- LC50- (INHALATION)RAT:
- TCLo- (INHALATION)HUMAN:

-STANDARDS AND LABELS

WORKPLACE STANDARDS

ACGIH TLV Values for CAS7783-41-7 (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

Oxygen difluoride

TLV:

TLV-TWA:
TLV-STEL:
TLV-Ceiling: 0.05 ppm

Notations and Endnotes:

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

TLV Basis - Critical Effect(s): Headache; pulm edema; URT irr
Molecular Weight: 54

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 CAS7783-41-7 (AIHA, 2006):

Not Listed

NIOSH REL and IDLH Values for CAS7783-41-7 (National Institute for Occupational Safety and Health, 2007):

Listed as: Oxygen difluoride
REL:

TWA:
STEL:
Ceiling: 0.05 ppm (0.1 mg/m(3))
Carcinogen Listing: (Not Listed) Not Listed
Skin Designation: Not Listed
Note(s):

IDLH:

IDLH: 0.5 ppm
Note(s): Not Listed

OSHA PEL Values for CAS7783-41-7 (U.S. Occupational Safety, and Health Administration (OSHA), 2010):

Listed as: Oxygen difluoride
Table Z-1 for Oxygen difluoride:

8-hour TWA:

ppm: 0.05

Parts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 torr.

mg/m3: 0.1

Milligrams of substances per cubic meter of air. When entry is in this column only, the value is exact; when listed with a ppm entry, it is approximate.

Ceiling Value:
Skin Designation: No
Notation(s): Not Listed

OSHA List of Highly Hazardous Chemicals, Toxics, and Reactives for CAS7783-41-7 (U.S. Occupational Safety and Health Administration, 2010):

Threshold Quantity, in pounds:100

ENVIRONMENTAL STANDARDS

EPA CERCLA, Hazardous Substances and Reportable Quantities for CAS7783-41-7 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA CERCLA, Hazardous Substances and Reportable Quantities, Radionuclides for CAS7783-41-7 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA RCRA Hazardous Waste Number for CAS7783-41-7 (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 CAS7783-41-7 (U.S. Environmental Protection Agency, 2010):

Not Listed

EPA SARA Title III, Community Right-to-Know for CAS7783-41-7 (40 CFR 372.65, 2006; 40 CFR 372.28, 2006):

Not Listed

DOT List of Marine Pollutants for CAS7783-41-7 (49 CFR 172.101 - App. B, 2005):

Not Listed

EPA TSCA Inventory for CAS7783-41-7 (EPA, 2005):

Not Listed

SHIPPING REGULATIONS

SURFACE

DOT -- Table of Hazardous Materials and Special Provisions for UN/NA Number 2190 (49 CFR 172.101, 2005):

Hazardous materials descriptions and proper shipping name: Oxygen difluoride, compressed

Symbol(s): Not Listed
Hazard class or Division: 2.3

2.3: Poisonous gas. See 49 CFR section 173.115 for definitions.

Identification Number: UN2190
Packing Group: Not Listed
Label(s) required (if not excepted): 2.3, 5.1, 8

2.3: Poison Gas.
5.1: Oxidizer.
8: Corrosive.

Special Provisions: 1

1: This material is poisonous by inhalation (see sxn. 171.8 of this subchapter) in Hazard Zone A (see sxn. 173.116(a) or sxn. 173.133(a) of this subchapter), and must be described as an inhalation hazard under the provisions of this subchapter.

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

Exceptions: None
Non-bulk packaging: 304
Bulk packaging: None

Quantity Limitations:

Passenger aircraft or railcar: Forbidden
Cargo aircraft only: Forbidden

Vessel Stowage Requirements:

Vessel stowage location: D

D: The material must be stowed "on deck only" 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 the material is prohibited on passenger vessels in which the limiting number of passengers is exceeded.

Vessel stowage other: 13, 40, 89, 90

13: Keep as dry as reasonably practicable.
40: Stow "clear of living quarters".
89: Segregation same as for oxidizers.
90: Stow "separated from" radioactive materials.

ICAO International Shipping Name for UN2190 (ICAO, 2002):

Proper Shipping Name: Oxygen difluoride, compressed
UN Number: 2190

LABELS

NFPA

NFPA Hazard Ratings for CAS7783-41-7 (NFPA, 2002):

Not Listed

-PERSONAL PROTECTION

SUMMARY

RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)

Wear positive pressure self-contained breathing apparatus (SCBA).
Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection.
Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.

Use of fully encapsulated protective clothing is recommended for fire fighting activities and safe handling and use of oxygen difluoride (AAR, 1987).

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 7783-41-7.

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 124 (ERG, 2004)
- Substance does not burn but will support combustion.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- These are strong oxidizers and will react vigorously or explosively with many materials including fuels.
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Some will react violently with air, moist air and/or water.
- Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
Oxygen difluoride may ignite other combustible materials. It can explode on contact with water, air or reducing agents (Sax & Lewis, 1987).
Under fire conditions, containers, cylinders or tank cars may violently rupture or rocket (AAR, 1987).

FLAMMABILITY CLASSIFICATION

NFPA Flammability Rating for CAS7783-41-7 (NFPA, 2002):

Not Listed

FIRE CONTROL/EXTINGUISHING AGENTS

SMALL FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)

Water only; no dry chemical, CO2 or Halon®.
Contain fire and let burn. If fire must be fought, water spray or fog is recommended.
Do not get water inside containers.
Move containers from fire area if you can do it without risk.
Damaged cylinders should be handled only by specialists.

TANK FIRE PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (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 CAS7783-41-7 (NFPA, 2002):

Not Listed

If fire becomes uncontrollable or container is exposed to direct flame, consider evacuation of one-third mile radius. If material is leaking (not on fire), consider evacuation from downwind area based on amount of material spilled, location and weather conditions (AAR, 1987).

Extinguish fire using agent suitable for type of surrounding fire (material itself does not burn or burns with difficulty) (AAR, 1987). However, do not use water on material itself, as oxygen difluoride can explode on contact with water, air or reducing agents (AAR, 1987; Sax & Lewis, 1987).

COMBUSTION TOXICITY

When heated to decomposition, oxygen difluoride emits highly toxic fumes of fluorines (Sax & Lewis, 1989).

EXPLOSION HAZARD

Oxygen difluoride forms explosive mixtures with a variety of materials.

Oxygen difluoride may explode on contact with water, air or reducing agents (Sax & Lewis, 1987).

REACTIVITY HAZARD

Oxygen difluoride reacts slowly with water to form hydrofluoric acid (NIOSH , 1990).

Oxygen difluoride is a very powerful oxidizer (Sax & Lewis, 1989).

Oxygen difluoride must NOT be brought into contact with reducing agents (Sax & Lewis, 1989).

Oxygen difluoride forms explosive reactions with adsorbents (eg, silica gel, alumina, molecular sieve); diborane; halogens + heat; metal halides; aluminum chloride; antimony pentachloride (at 150 degrees C); tungsten + heat; hydrogen sulfide; liquid nitrogen oxide; nitrosyl fluoride; charcoal; and sulfur tetrafluoride (Sax & Lewis, 1989).

Mixtures with chlorine, bromine or iodine explode on warming (HSDB , 1991).

Oxygen difluoride forms spark-sensitive explosive mixtures with water or combustible gases (eg, carbon monoxide, hydrogen, methane) (Sax & Lewis, 1989).

Oxygen difluoride ignites on contact with diborane tetrafluoride; non-metals (eg, red phosphorus, boron powder, silicon); phosphorus(V) oxide; and nitrogen oxide gas (Sax & Lewis, 1989).

Oxygen difluoride forms an incandescent reaction with metals (eg, aluminum, barium, cadmium, magnesium, strontium, zinc, zirconium, lithium) (above 400 degrees C), potassium (above 400 degrees C) and sodium (Sax & Lewis, 1989).

Oxygen difluoride corrodes mercury (Budavari, 1989).

Oxygen difluoride does not react with glass in cold temperatures (Budavari, 1989).

Oxygen difluoride is incompatible with ammonia; As2O3; Cl2 + Cu; CrO3; Iridium; O3; O2 + H2O; Palladium; Platinum; Rhodium; Ruthenium; and, Silica (Sax & Lewis, 1989).

Oxygen difluoride explodes on contact with water, air and reducing agents (Sax & Lewis, 1987).

When heated to decomposition, oxygen difluoride emits highly toxic fumes of fluorines (Sax & Lewis, 1989).

EVACUATION PROCEDURES

SUMMARY

Initial Isolation and Protective Action Distances (ERG, 2004)

Data presented from the Emergency Response Guidebook Table of Initial Isolation and Protective Action Distances are for use when a spill has occurred and there is no fire. If there is a fire, or if a fire is involved, evacuation information presented under FIRE - PUBLIC SAFETY EVACUATION DISTANCES should be used.
Generally, a small spill is one that involves a single, small package such as a drum containing up to approximately 200 liters, a small cylinder, or a small leak from a large package. A large spill is one that involves a spill from a large package, or multiple spills from many small packages.
Suggested distances to protect from vapors of toxic-by-inhalation and/or water-reactive materials during the first 30 minutes following the spill.

DOT ID No. 2190 - Oxygen difluoride

SMALL SPILLS

First isolate in all directions: 600 meters (2000 feet).
Note wind direction.
Then protect persons downwind:

during the DAY for: 5.9 kilometers (3.7 miles); or
during the NIGHT for: 11.0+ kilometers (7.0+ miles).

LARGE SPILLS

First isolate in all directions: 1000 meters (3000 feet).
Note wind direction.
Then protect persons downwind:

during the DAY for: 11.0+ kilometers (7.0+ miles); or
during the NIGHT for: 11.0+ kilometers (7.0+ miles).

DOT ID No. 2190 - Oxygen difluoride, compressed

SMALL SPILLS

First isolate in all directions: 600 meters (2000 feet).
Note wind direction.
Then protect persons downwind:

during the DAY for: 5.9 kilometers (3.7 miles); or
during the NIGHT for: 11.0+ kilometers (7.0+ miles).

LARGE SPILLS

First isolate in all directions: 1000 meters (3000 feet).
Note wind direction.
Then protect persons downwind:

during the DAY for: 11.0+ kilometers (7.0+ miles); or
during the NIGHT for: 11.0+ kilometers (7.0+ miles).

SPILL - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)

Increase, in the downwind direction, as necessary, the isolation distance of at least 100 meters (330 feet) in all directions.

FIRE - PUBLIC SAFETY EVACUATION DISTANCES - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (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 124 (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.
Ventilate closed spaces before entering.

If material is leaking (not on fire), consider evacuation from downwind area based on amount of material spilled, location and weather conditions (AAR, 1987).

AIHA ERPG Values for CAS7783-41-7 (AIHA, 2006):

Not Listed

DOE TEEL Values for CAS7783-41-7 (U.S. Department of Energy, Office of Emergency Management, 2010):

Listed as Oxygen difluoride (Fluorine monoxide)
TEEL-0 (units = ppm): 0.05
TEEL-1 (units = ppm): 0.1
TEEL-2 (units = ppm): 0.83
TEEL-3 (units = ppm): 2.5
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 CAS7783-41-7 (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: Oxygen difluoride
Proposed Value:

AEGL-1

10 min exposure:

ppm: Not recommended due to insufficient data
mg/m3:

30 min exposure:

ppm: Not recommended due to insufficient data
mg/m3:

1 hr exposure:

ppm: Not recommended due to insufficient data
mg/m3:

4 hr exposure:

ppm: Not recommended due to insufficient data
mg/m3:

8 hr exposure:

ppm: Not recommended due to insufficient data
mg/m3:

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: Oxygen difluoride
Proposed Value:

AEGL-2

10 min exposure:

ppm: 4.3 ppm
mg/m3:

30 min exposure:

ppm: 1.6 ppm
mg/m3:

1 hr exposure:

ppm: 0.83 ppm
mg/m3:

4 hr exposure:

ppm: 0.24 ppm
mg/m3:

8 hr exposure:

ppm: 0.13 ppm
mg/m3:

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: Oxygen difluoride
Proposed Value:

AEGL-3

10 min exposure:

ppm: 13 ppm
mg/m3:

30 min exposure:

ppm: 4.7 ppm
mg/m3:

1 hr exposure:

ppm: 2.5 ppm
mg/m3:

4 hr exposure:

ppm: 0.71 ppm
mg/m3:

8 hr exposure:

ppm: 0.38 ppm
mg/m3:

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 CAS7783-41-7 (National Institute for Occupational Safety and Health, 2007):

IDLH: 0.5 ppm
Note(s): Not Listed

CONTAINMENT/WASTE TREATMENT OPTIONS

SUMMARY

SPILL OR LEAK PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)
- Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire.
- Do not touch or walk through spilled material.
- Keep combustibles (wood, paper, oil, etc.) away from spilled material.
- Stop leak if you can do it without risk.
- 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.
- If possible, turn leaking containers so that gas escapes rather than liquid.
- Prevent entry into waterways, sewers, basements or confined areas.
- Isolate area until gas has dispersed.
- Ventilate the area.
RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 124 (ERG, 2004)
- Wear positive pressure self-contained breathing apparatus (SCBA).
- Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection.
- Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.
At the time of this 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 , 1991).

-ENVIRONMENTAL HAZARD MANAGEMENT

POLLUTION HAZARD

Oxygen difluoride has been detected in the effluent gases from an uranium oxide conversion facility (HSDB , 1991).

ENVIRONMENTAL FATE AND KINETICS

OTHER

OTHER
- No information on the environmental kinetics of oxygen difluoride was found in available references at the time of this review.

ENVIRONMENTAL TOXICITY

No information on the environmental toxicity of oxygen difluoride was found in available references at the time of this review.

-PHYSICAL/CHEMICAL PROPERTIES

MOLECULAR WEIGHT

54.00 (Budavari, 1989; RTECS , 1991; Sax & Lewis, 1989)

DESCRIPTION/PHYSICAL STATE

Oxygen difluoride is a colorless gas. When liquid, it is yellowish-brown (Budavari, 1989).

It is an unstable, colorless gas with a foul odor; it is yellowish-brown when liquid (Sax & Lewis, 1987; Sax & Lewis, 1989; Budavari, 1989; ACGIH, 1986).

No information found at the time of this review.

VAPOR PRESSURE

760 mmHg (at -144.6 degrees C) (HSDB , 1991)

DENSITY

OTHER TEMPERATURE AND/OR PRESSURE

LIQUID: 1.9 g/mL (at -223.8 degrees C) (ACGIH, 1986)
LIQUID: 1.9 g/mL (at -224 degrees C) (Budavari, 1989; Sax & Lewis, 1989)

FREEZING/MELTING POINT

MELTING POINT

-223.8 degrees C (liquid) (Budavari, 1989; Sax & Lewis, 1989)

BOILING POINT

-145.3 degrees C (Budavari, 1989)

-144.8 degrees C (Sax & Lewis, 1989; HSDB , 1991)

-114.8 degrees C (ACGIH, 1986)

SOLUBILITY

IN WATER

Oxygen difluoride is slightly soluble in water (Sax & Lewis, 1987).
It is insoluble in hot water (HSDB , 1991).
6.8 mL gas/100 mL water (at 0 degrees C) (Budavari, 1989)
0.02% (ACGIH, 1986)

IN ORGANIC SOLVENTS

Oxygen difluoride is slightly soluble in ethanol (Sax & Lewis, 1987; ACGIH, 1986).

OTHER

Oxygen difluoride is slightly soluble alkalis (ACGIH, 1986).
It is slightly soluble in acid (HSDB , 1991).

OTHER/PHYSICAL

IONIZATION POTENTIAL

13.13 eV (HSDB , 1991)

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Classification | Information to evaluate chemical incidents

Information to evaluate chemical incidents

Information to evaluate chemical incidents

Information to evaluate chemical incidents