What is Chlorobenzene?
Chlorobenzene is a colorless, flammable liquid with an aromatic, almond-like odor. Some of it will dissolve in water, but it readily evaporates into air. It does not occur naturally in the environment.
The primary uses of chlorobenzene are as a solvent for pesticide formulations, di-isocyanate manufacture, and degreasing automobile parts and for the production of nitro chlorobenzene. In the past, chlorobenzene was used as an intermediate in phenol and DDT production.
Sources & Potential Exposure
Chlorobenzene is used primarily as a solvent, a degreasing agent, and a chemical intermediate. Limited information is available on the acute (short-term) effects of chlorobenzene. Acute inhalation exposure of animals to chlorobenzene produced narcosis, restlessness, tremors, and muscle spasms. Chronic (long term) exposure of humans to chlorobenzene affects the central nervous system (CNS). Signs of neurotoxicity in humans include numbness, cyanosis, hyperesthesia (increased sensation), and muscle spasms.Human exposure to chlorobenzene appears to be primarily occupational. In urban areas, chlorobenzene may be released to the ambient air during its manufacture and use. No information is available on the carcinogenic effects of chlorobenzene in humans.
EPA has classified chlorobenzene as a Group D, not classifiable as to human carcinogenicity.