# NIOSH Pocket Guide to Chemical Hazards
Oxygen difluoride | CAS 7783-41-7
OF2 | RTECS RS2100000
Synonyms & Trade Names Difluorine monoxide, Fluorine monoxide, Oxygen fluoride | DOT ID & Guide 2190 124
Exposure Limits | NIOSH REL: C 0.05 ppm (0.1 mg/m3)
OSHA PEL†: TWA 0.05 ppm (0.1 mg/m3)
IDLH 0.5 ppm | Conversion 1 ppm = 2.21 mg/m3
Physical Description Colorless gas with a peculiar, foul odor. [Note: Shipped as a nonliquefied compressed gas.]
MW: 54.0 | BP: -230°F | FRZ: -371°F | Sol: 0.02%
VP: >1 atm | IP: 13.11 eV | RGasD: 1.88 |
Fl.P: NA | UEL: NA | LEL: NA |
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.]
Measurement Methods None available
Personal Protection & Sanitation 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
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
See also: INTRODUCTION