Documentation for Immediately Dangerous To Life or Health Concentrations (IDLHs)
CAS number: 7790–91–2
NIOSH REL: 0.1 ppm (0.4 mg/m3) CEILING
Current OSHA PEL: 0.1 ppm (0.4 mg/m3) CEILING
1989 OSHA PEL: Same as current PEL
1993-1994 ACGIH TLV: 0.1 ppm (0.38 mg/m3) CEILING
Description of Substance: Colorless gas or a greenish-yellow liquid (below 53 F) with a somewhat sweet, suffocating odor.
LEL: . . Nonflammable Gas
Original (SCP) IDLH: 20 ppm
Basis for original (SCP) IDLH: The chosen IDLH is based on the following data presented by Horn and Weir  concerning the inhalation toxicology of chlorine trifluoride. "Two dogs and 20 rats were exposed 6 hours/day for 2 days to 21 ppm. No mortality occurred among the animals, but during the first day's exposure, the dogs became nauseated, coughed up a small quantity of mucous material, and had rapid respiration and salivation. Both the rats and the dogs had a singed feel to their fur." This is probably a conservative IDLH because Deichmann and Gerarde  made the statement that 50 ppm or more may be fatal in 0.5 to 2 hours.
Existing short-term exposure guidelines: National
Research Council [NRC 1984] Emergency Exposure Guidance Levels
10-min EEGL: 7 ppm
30-min EEGL: 3 ppm
60-min EEGL: 1 ppm
ACUTE TOXICITY DATA
Lethal concentration data:
|Dost et al. 1974|
Dost et al. 1974
Horn and Weir 1955
MacEwen and Vernot 1970
MacEwen and Vernot 1970
Vernot et al. 1977
|632 ppm (0.79) |
420 ppm (1.05)
190 ppm (2.0)
223 ppm (1.25)
288 ppm (1.25)
374 ppm (1.25)
|63 ppm |
Other animal data: No mortality occurred among 2 dogs and rats exposed to 21 ppm for 6 hours but the dogs became nauseated, coughed up a small amount of mucous material, and had rapid respiration and salivation [Horn and Weir 1955].
Human data: It has been reported that 50 ppm or more may be fatal in 30 minutes to 2 hours [Deichmann and Gerarde 1969].
|Revised IDLH: 20 ppm [Unchanged]
Basis for revised IDLH: Based on acute inhalation toxicity data in humans [Deichmann and Gerarde 1969] and animals [Horn and Weir 1955; MacEwen and Vernot 1970], the original IDLH for chlorine trifluoride (20 ppm) is not being revised at this time.
1. Deichmann WB, Gerarde HW . Chlorine trifluoride. In: Toxicology of drugs and chemicals. New York, NY: Academic Press, Inc., p. 651.
2. Dost FN, Reed DJ, Smith VN, Wang CH . Toxic properties of chlorine trifluoride. Toxicol Appl Pharmacol 27:527-536.
3. Horn HJ, Weir RJ . Inhalation toxicology of chlorine trifluoride. AMA Arch Ind Health 12:515-517.
4. MacEwen JD, Vernot CH . Toxic Hazards Research Unit annual technical report: 1970. Wright-Patterson Air Force Base, OH: Aerospace Medical Research Laboratory, Report AMRL-TR-70-77.
5. NRC . Emergency and continuous exposure limits for selected airborne contaminants. Vol. 2. Washington, DC: National Academy Press, Committee on Toxicology, Board on Toxicology and Environmental Health Hazards, Commission on Life Sciences, National Research Council, pp. 12-16.
6. Vernot EH, MacEwen JD, Haun CC, Kinkead ER . Acute toxicity
and skin corrosion data for some organic and inorganic compounds
and aqueous solutions. Toxicol Appl Pharmacol 42:417-423.
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