... monohydrate, diamide hydrate, aqueous hydrazine, hydrazine hydroxide, hydrazinium hydroxide Use: Molecular formula: N2H4.H2O CAS No: 7803-57-8 ( ... to 100% hydrazine in air. Read safety data sheet fully before use.ToxicologyToxic, and may be fatal, if inhaled, swallowed or ... working area. Prepare a risk assessment and COSHH statement before starting work.Safety phrases (The meaning of any safety ...