1,3-Diamino-2-thiourea 2231-57-4 Carbohydrazide, thio- Carbonothioic dihydrazide Hydrazinecarbohydrazonothioic acid NSC689 TCH THIOCARBOHYDRAZIDE Thiocarbazide Thiocarbonic dihydrazide Thiocarbonohydrazide Usaf ek-7372 WLN: ZMYUS&MZ