Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 67-64-1
NIOSH REL: 250 ppm (590 mg/m3) TWA
Current OSHA PEL: 1,000 ppm (2,400 mg/m3) TWA
1989 OSHA PEL: 750 ppm (1,800 mg/m3) TWA, 1,000 ppm (2,400 mg/m3) STEL
1993-1994 ACGIH TLV: 750 ppm (1,780 mg/m3) TWA, 1,000 ppm (2,380 mg/m3) STEL
Description of substance: Colorless liquid with a fragrant, mint-like odor.
LEL: 2.5% (10% LEL, 2,500 ppm)
Original (SCP) IDLH: 20,000 ppm
Basis for original (SCP) IDLH: There is no evidence in the available toxicological data that acetone presents an IDLH hazard below the lower explosive limit (LEL) of 25,000 ppm. Because Patty  reported that a 1.5-hour exposure to 20,256 ppm is narcotic for mice, 20,000 ppm has been chosen as the IDLH.
Existing short-term exposure: National Research Council [NRC 1984] guideline
Emergency Exposure Guidance Levels (EEGLs):
1-hour EEGL: 8,500 ppm
24-hour EEGL: 1,000 ppm
ACUTE TOXICITY DATA
Lethal concentration data:
|Mouse||Flury and Wirth, 1933||-----||45,455||1 hr||56,818 ppm (1.25)||5,682 ppm|
|Rat||Pozzani et al. 1959||20,702||-----||8 hr||51,755 ppm (2.5)||5,176 ppm|
Lethal dose data:
|Rat||Freeman and Hayes 1985||oral||5,800||-----||16,777 ppm||1,678 ppm|
|Mouse||Molodykh et al. 1980||oral||3,000||-----||8,678 ppm||868 ppm|
|Rabbit||WHO 1980||oral||5,340||-----||15,446 ppm||1,545 ppm|
Other animal data: RD50 (mouse), 77,516 ppm [Alarie 1981].
Human data: Volunteers experienced slight irritation at 300 ppm but 500 ppm was tolerated [Nelson et al. 1943]. Eye irritation, headache, lightheadedness, nasal irritation, and throat irritation were noted in workers exposed to concentrations considerably in excess of 1,000 ppm and perhaps as high as 6,500 ppm [Raleigh and McGee 1972]. No indications of toxicity were reported following exposures to 2,100 ppm for 8 hours/day [Haggard et al. 1944].
Revised IDLH: 2,500 ppm [LEL]
Basis for revised IDLH: Based on health considerations and acute inhalation toxicity data in humans [Haggard et al. 1944; Raleigh and McGee 1972] and animals [Flury and Wirth 1933; Pozzani et al. 1959], a value of about 5,000 ppm would have been appropriate for acetone. However, the revised IDLH for acetone is 2,500 ppm based strictly on safety considerations (i.e., being 10% of the lower explosive limit of 2.5%).
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- Freeman JJ, Hayes EP . Acetone potentiation of acute acetonitrile toxicity in rats. J Toxicol Environ Health 15:609-621.
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- Patty FA, ed. . Industrial hygiene and toxicology. 2nd rev. ed. Vol. II. Toxicology. New York, NY: Interscience Publishers, Inc., p. 1788.
- Pozzani UC, Weil CS, Carpenter CP . The toxicological basis of threshold limit values: 5. The experimental inhalation of vapor mixtures by rats, with notes upon the relationship between single dose inhalation and single dose oral data. Am Ind Hyg Assoc J 20:364-369.
- Raleigh RL, McGee WA . Effects of short, high-concentration exposures to acetone as determined by observation in the work area. J Occup Med 14(8):607-610.
- WHO . Acetone: biological data. In: Toxicological evaluation of some solvents and certain other substances. Food and Agriculture Organization Nutrition Meetings Report Series 48A. Geneva, Switzerland: United Nations, World Health Organization, pp. 86-90.
- Page last reviewed: December 4, 2014
- Page last updated: December 4, 2014
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