Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 7782–41–4
NIOSH REL: 0.1 ppm (0.2 mg/m3) TWA
Current OSHA PEL: 0.1 ppm (0.2 mg/m3) TWA
1989 OSHA PEL: Same as current PEL
1993-1994 ACGIH TLV: 1 ppm (1.6 mg/m3) TWA, 2 ppm (3.1 mg/m3) STEL
Description of Substance: Pale-yellow to greenish gas with a pungent, irritating odor.
LEL: . . Nonflammable Gas
Original (SCP) IDLH: 25 ppm
Basis for original (SCP) IDLH: The chosen IDLH is based on the statement by AIHA  that “2 men were able to tolerate 25 ppm very briefly but both developed sore throats and chest pains lasting 6 hours; 50 ppm could not be tolerated [Rickey 1959].”
Existing short-term exposure guidelines: National Research Council [NRC 1984] Emergency Exposure Guidance Levels (EEGLs):
10-minute EEGL: 15 ppm
30-minute EEGL: 10 ppm
60-minute EEGL: 7.5 ppm
ACUTE TOXICITY DATA
Lethal concentration data:
|Species||Reference||LC50(ppm)||LCLo(ppm)||Time||Adjusted 0.5-hrLC (CF)||Derivedvalue|
|Keplinger and Suissa 1968Keplinger and Suissa 1968
Keplinger and Suissa 1968
Keplinger and Suissa 1968
|1 hr1 hr
|231 ppm (1.25)188 ppm (1.25)
270 ppm (1.0)
213 ppm (1.25)
|23 ppm19 ppm
Human data: It has been reported that 2 men were able to tolerate 25 ppm very briefly but both developed sore throats and chest pains that lasted 6 hours; 50 ppm could not be tolerated [Rickey 1959]. Volunteers tolerated 10 ppm for 15 minutes with a minimum of irritation [Ricca 1970]. Intermittent exposures to 10 ppm were repeated every 3 to 5 minutes for 15 minutes over 2 to 3 hours with only slight irritation of the eyes and skin noted [Ricca 1970]. Much irritation of the eyes have been noted at 100 ppm, but with no aftereffects after only 30 seconds [Grant 1974]. It has been observed that exposures up to 30 ppm for 5 to 30 minutes had no ill effects [Lyon 1962].
|Revised IDLH: 25 ppm [Unchanged]Basis for revised IDLH: Based on acute inhalation toxicity data in humans [Grant 1974; Lyon 1962; Ricca 1970; Rickey 1959], the original IDLH for fluorine (25 ppm) is not being revised at this time.|
1. AIHA . Fluorine (revised 1965). In: Hygienic guide series. Am Ind Hyg Assoc J 26:624-627.
2. Grant WM . Toxicology of the eye. 2nd ed. Springfield, IL: C.C. Thomas, p. 499.
3. Keplinger ML, Suissa LW . Toxicity of fluorine short-term inhalation. Am Ind Hyg Assoc J 29:10-18.
4. Lyon JS . Observations on personnel working with fluorine at a gaseous diffusion plant. J Occup Med 4:199-201.
5. NRC . Emergency and continuous exposure limits for selected airborne contaminants. Vol. 1. Washington, DC: National Academy Press, Committee on Toxicology, Board on Toxicology and Environmental Health Hazards, Commission on Life Sciences, National Research Council, pp. 77-88.
6. Ricca PM . A survey of the acute toxicity of elemental fluorine. Am Ind Hyg Assoc J 3:22-29.
7. Rickey RP . Decontamination of large liquid fluorine spills. Arlington, VA: Edwards Air Force Base, ASTIA Document Service Center, Air Force Flight Test Center Technical Report 59-31.
- Page last reviewed: December 4, 2014
- Page last updated: December 4, 2014
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