Chloroacetophenone Chemical formula

Chemical information

etofenona; CN; CN Gas; Phenacyl Chloride. 2-Chloroacetophenone.
Chemical formula: C8H7ClO = 154.6.
CAS — 532-27-4.
NOTE. The name mace is applied to solutions of chloroacetophenone.


Chloroacetophenone is a lachrymatory which is irritant to the skin and eyes. It has been used in a riot-control gas; it is described as a tear gas.
1. Hu H, et al. Tear gas—harassing agent or toxic chemical weapon? JAMA 1989; 262: 660–3
2. Treudler R, et al. Occupational contact dermatitis due to 2-chloracetophenone tear gas. Br J Dermatol 1999; 140: 531–4
3. Blain PG. Tear gases and irritant incapacitants. 1-chloroacetophenone, 2-chlorobenzylidene malononitrile and dibenz[b,f]1,4-oxazepine. Toxicol Rev 2003; 22: 103–10.
Published March 10, 2019.