Factories and Industrial Undertakings (Carcinogenic Substances) Regulations 1986 Jurisdiction China - Hong Kong Year 1986 Published in English Serial title Hong Kong Government Gazette Source 1986, No.46, p.B731-B737. Serial number L.N. 270 of 1986 Descriptors [Primary] Hong Kong, carcinogens, dangerous substances, prohibition of use [Secondary] 1-naphthylamine, 2,2'-dichlorobenzidine, 2-naphthylamine, 3,3'-dichlorobenzidine, 4-aminobiphenyl, 4-nitrobiphenyl, Magenta, auramine O, benzidine, dimethoxybenzidine, dimethylbenzidine, law, list of chemical substances Subject category Chemical safety Abstract Regulation prohibiting (except by written exemption issued by the Commissioner of Labour) or severely controlling the industrial use of certain substances judged to be carcinogenic. The prohibited substances are: beta-naphthylamine and its salts, benzidine and its salts, 4-aminodiphenyl and its salts, 4-nitrodiphenyl and its salts. Controlled substances are: alpha-naphthylamine and its salts, ortho-tolidine and its salts, dianisidine and its salts, dichlorobenzidine and its salts, auramine, magenta. A sample Health Register of Persons Employed in Connection with Carcinogenic Substances, with text in English and Chinese, is appended. CIS No. 89-30 Database ID 51156