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Oxygen difluoride

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Synonyms & Trade Names
Difluorine monoxide, Fluorine monoxide, Oxygen fluoride
CAS No.
7783-41-7
RTECS No.
RS2100000
DOT ID & Guide
2190 124
Formula
OF₂
Conversion
1 ppm = 2.21 mg/m3
IDLH
0.5 ppm
See: 7783417
Exposure Limits
NIOSH REL
C 0.05 ppm (0.1 mg/m3)
OSHA PEL
TWA 0.05 ppm (0.1 mg/m3) See Appendix G
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Colorless gas with a peculiar, foul odor. [Note: Shipped as a nonliquefied compressed gas.]
Molecular Weight
54.0
Boiling Point
-230°F
Freezing Point
-371°F
Solubility
0.02%
Vapor Pressure
>1 atm
Ionization Potential
13.11 eV
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Relative Gas Density
1.88
Nonflammable Gas, but a strong oxidizer.
Incompatibilities & Reactivities
Combustible materials, chlorine, bromine, iodine, platinum, metal oxides, moist air, hydrogen sulfide, hydrocarbons, water [Note: Reacts very slowly with water to form hydrofluoric acid.]
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; headache; pulmonary edema; eye, skin burns (from contact with the gas under pressure)
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Respirator Recommendations

NIOSH/OSHA

Up to 0.5 ppm:
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern¿
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0818   MEDICAL TESTS: 0171
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health