Triamino Hydrazine
Background Information
Chemical Formula



Triamino Hydrazine is a fuel used by the UNSC. The root material, Hydrazine (Chemical formula N2H4), has been used as a rocket fuel since Earth's Second World War.

Triamino Hydrazine is compressed and stored in fuel tanks of T-PACKs. Though an efficient fuel, Triamino Hydrazine is extremely volatile, and if the tank is ruptured, it will cause a fatal loss of control for the wearer of the T-PACK.[1]

Hydrazine is also used as a fuel for propulsion pods on some civilian commercial freighters used by humans, such as the Horn of Plenty.[2]


  1. Halo: Ghosts of Onyx, page 50
  2. Halo: Contact Harvest, page 25