Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 532–27–4
NIOSH REL: 0.3 mg/m3 (0.05 ppm) TWA
Current OSHA PEL: 0.3 mg/m3 (0.05 ppm) TWA
1989 OSHA PEL: Same as current PEL
1993-1994 ACGIH TLV: 0.32 mg/m3 (0.05 ppm) TWA
Description of Substance: Colorless to gray crystalline solid with a sharp, irritating odor.
LEL: . . Unknown
Original (SCP) IDLH: 100 mg/m3
Basis for original (SCP) IDLH: ACGIH  reported that the effective concentration to produce casualties as estimated from volunteer exposure is greater than 100 mg/m3. Deichmann and Gerarde  reported that a fatality followed an exposure of less than 20 minutes to high concentrations of vapor (5.4 grams in a 34 m3 room, which is roughly equivalent to 160 mg/m3). Based on the data cited above, an IDLH of 100 mg/m3 is chosen.
Short-term exposure guidelines: None developed
ACUTE TOXICITY DATA
Lethal concentration data:
Other animal data: RD50 (mouse), 6.2 mg/m3 [Alarie 1981].
Other human data: It has been reported that 31 mg/m3 is intolerable after 3 minutes [Punte et al. 1962].
|Revised IDLH: 15 mg/m3Basis for revised IDLH: The revised IDLH for -chloroacetophenone is 15 mg/m3 based on acute inhalation toxicity data in humans [Deichmann and Gerarde 1969; Punte et al. 1962].|
1. ACGIH . alpha-Chloroacetophenone. In: Documentation of threshold limit values for substances in workroom air. 3rd ed. Cincinnati, OH: American Conference of Governmental Industrial Hygienists, pp. 48-49.
2. Alarie Y . Dose-response analysis in animal studies: prediction of human responses. Environ Health Perspect 42:9-13.
3. Ballantyne B, Swanston DW . The comparative acute mammalian toxicity of 1-chloroacetophenone (CN) and 2-chlorobenzylidene malononitrile (CS). Arch Toxicol 40:75-95.
4. Deichmann WB, Gerarde HW . Chloroacetophenone. In: Toxicology of drugs and chemicals. New York, NY: Academic Press, Inc., p. 163.
5. Prentiss AM . Chemicals in war. A treatise on chemical warfare. New York, NY: McGraw-Hill Book Company, Inc., pp. 142-144.
6. Punte CL, Ballard TA, Weimer JT . Inhalation studies with chloroacetophenone, diphenylaminochloroarsine and pelargonic morpholide. I. Animal exposures. Am Ind Hyg Assoc J 23:194-198.