Yep! Hydrazine is used to power the Emergency Power Unit (EPU) in the event of a partial or complete loss of engine power. The EPU provides emergency hydraulic and electrical power to essential systems. It does this using a mixture of bleed air (from the engine turbine section) and/or hydrazine. The hydrazine is only used should the engine have failed to the point that it can not supply sufficient bleed air to power the EPU.

Hydrazine has no smell and is extremely carcinogenic. So, the Hydrazine used has ammonia added to it to make it detectable by scent. This way technicians can easily identify a leak, know that they have been exposed, evacuate the area and quarantine themselves.

N2H4 is called hydrazine. It is also called diamine.

Hydrazine is a form of matter, not energy.

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Hydrazine. Keep up the hard work!