My father worked at Brookes Medical Center (Brookes AFB, SAN Antonio). They were running Hydrazine tests for NASA as it was to be used for control Jets on the different space missions. It was used on the space shuttle for a while and was the reason people couldn't approach it after landing for a period of time. Very toxic. Interesting findings: If you place a finger in Hydrazine liquid or residue you can taste it almost immediately because its penetrates the skin. Whether burnt or unburnt it still retains its toxicity. Will kill (very unpleasent) as fast as 10 minutes depending on exposure. Was outlawed many years ago in drag racing but some people still try to sneak it in the fuel mix. The flame is a greenish yellow. Side note, theres been some cases where poison was mixed in hydrazine and the poison acted very quickly.