| 2629 | 1,4-Dichlorobut-2-yne1,4-Dichloro-2-butyn, 1,4-Dichloro-2-butyne, 1,4-Dichloro-but-2-yne, 1,4-Dichlorobutyne, 2-Butyne, 1,4-dichloro-, Bis(chloromethyl)acetylene, Dichlorobutyne |  | Agricultural Chemicals Control Act |  |  | Prohibition of manufacture, processing and import without registration | Ministry of Agriculture, Forestry and Fisheries |  | Agricultural Chemicals Control Act | 
| 1680 | 1,4-Dichlorobut-2-yne1,4-Dichloro-2-butyn, 1,4-Dichloro-2-butyne, 1,4-Dichloro-but-2-yne, 1,4-Dichlorobutyne, 2-Butyne, 1,4-dichloro-, Bis(chloromethyl)acetylene, Dichlorobutyne |  | Poisonous and Deleterious Substances Control Act | Deleterious Substances |  | Management of the storing amount; Locked storage; Showing “Deleterious substance, not for medical use” on containers and storage, restriction of manufacture, import, sale, and handling | Ministry of Health, Labour and Welfare |  | Poisonous and Deleterious Substances Control Act | 
| 2037 | 1,4-Dichlorobut-2-yne1,4-Dichloro-2-butyn, 1,4-Dichloro-2-butyne, 1,4-Dichloro-but-2-yne, 1,4-Dichlorobutyne, 2-Butyne, 1,4-dichloro-, Bis(chloromethyl)acetylene, Dichlorobutyne |  | Poisonous and Deleterious Substances Control Act | Deleterious Substances |  | Management of the storing amount; Locked storage; Showing “Deleterious substance, not for medical use” on containers and storage, restriction of manufacture, import, sale, and handling | Ministry of Health, Labour and Welfare |  | Poisonous and Deleterious Substances Control Act |