Agent Name

Oxygen difluoride

CAS Number

7783-41-7

Formula

F2-O

Major Category

Toxic Gases & Vapors

Synonyms

Difluorine monoxide; Difluorure d'oxygene [French]; Difluoruro de oxigeno [Spanish]; Fluorine (di-)oxide; Fluorine monoxide; Fluorine oxide; Oxydifluoride; Oxygen fluoride (OF2); [ChemIDplus] UN2190

Category

Oxidizers

Description

Colorless gas with a peculiar, foul odor. [Note: Shipped as a nonliquefied compressed gas.]; [NIOSH]

Sources/Uses

Used as an oxidizer for rocket fuels; [ACGIH]

Comments

Animals exposed to concentrations above 0.5 ppm experience pulmonary edema and hemorrhage. Laboratory workers developed severe headaches after exposures to parts-per-billion levels. [ACGIH] Causes lachrymation; [ICSC] Contact with gas or liquified gas may cause burns or frostbite; [CAMEO] Fluoride levels should be monitored in chronically exposed workers. [HSDB] A corrosive substance that can cause pulmonary edema; [ICSC]

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TIH

Yes

Ceiling (ACGIH)

0.05 ppm

PEL (OSHA)

0.05 ppm

Excerpts from Documentation for IDLHs

Human data: Oxygen difluoride is a strong irritant to the entire respiratory tract and causes pulmonary edema and hemorrhage when inhaled for a few hours at 0.5 ppm [Deichmann and Gerarde 1969].

Odor Threshold Low

0.09 ppm

Lethal Concentration

LC50 (rat) = 2.6 ppm/1H

Explanatory Notes

Odor threshold from AIHA;

Reference Link

ICSC: Oxygen difluoride

Adverse Effects
Lacrimator

Yes

Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: