A colorless, fuming hydroscopic liquid (H2NNH2) with a flash point of 100°F and an ignition temperature of 518°F; it is highly toxic if ingested, inhaled, or absorbed through the skin, and explodes when exposed to heat or oxidizing materials
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}