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Chemical Sampling Information (CSI)
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General Description

Synonyms: Difluorine monoxide; Fluorine monoxide

OSHA IMIS Code Number: 1975

Chemical Abstracts Service (CAS) Registry Number: 7783-41-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: RS2100000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2190 20

Chemical Description and Physical Properties:

colorless gas with a foul odor
molecular weight: 54
vapor pressure: >1 atm
boiling point: -229°F
melting point: -371°F

Incompatibilities: All combustible materials, chlorine, bromine, iodine, platinum, metal oxides, moist air

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.05 ppm, 0.1 mg/m3

Construction Industry: 0.05 ppm, 0.1 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.05 ppm, 0.11 mg/m3 Ceiling

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 ppm Ceiling

Health Factors

Potential Symptoms: Intractable headaches; respiratory system irritation; pulmonary edema; eye, skin burns

Health Effects: Irritation-Respiratory tract---Marked (HE14) Marked edema lungs (HE11); Cumulative kidney damage (HE3) CNS effects (Headache) (HE7)

Affected Organs: Lungs, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • Standard has been stayed until an analytical method can be developed.

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