Synonyms: D2-1,3,4-Thiadiazoline-5-thione,2-mercapto-4-phenyl- (6CI,8CI); 2-Mercapto-4-phenyl-1,3,4-thiadiazole-5-thione;2-Mercapto-4-phenyl-1,3,4-thiadiazoline-5-thione; 3-Phenylbismuthol;5-Mercapto-3-phenyl-1,3,4-thiadazole-2-thione;5-Mercapto-3-phenyl-1,3,4-thiadiazole-2-thione;5-Mercapto-3-phenyl-1,3,4-thiadiazoline-2-thione; Bismuthiol II