... a white crystalline powder; 3. Assay:NLT99.0%; Name: 2,5-Dimercapto-1,3,4-Thiadiazole; CAS:1072-71-5;Synonyms:1,3, ... 4-Thiadiazole-2,5-dithiol; 1,3,4-Thiadiazolidine-2,5-dithione; Bismuthiol; BismuthiolI; DMTD; 1,3 ... ,4-thiadiazol-dithiol-(2,5); 2,5-Dimercapto-1,3,4-thiodiazole; BismuthonI; Dimercaptothiadiazole; ...