Synonyms: 1,3,4-Thiadiazole-2-thiol,5-methylamino- (6CI); 1,3,4-Thiadiazolidine-2-thione, 5-(methylimino)- (8CI);2-(Methylamino)-5-mercapto-1,3,4-thiadiazole;2-(N-Methylamino)-5-mercapto-1,3,4-thiadiazole;2-Mercapto-5-methylamino-1,3,4-thiadiazole;5-Methylamino-1,3,4-thiadiazole-2(3H)-thione;5-Methylamino-2-mercapto-1,3,4-thiadiazole; NSC 184818