Hydrazine

Hydrazine is a consumable resource used primarily as rocket fuel in Astroneer. It is one of the key propulsion materials in the game, powering spacecraft travel through the Hydrazine Thruster and also serving as an ingredient in other crafting recipes. Although it now functions as an independent resource, it still retains the older canister-style model in some contexts.

Hydrazine is closely tied to long-distance movement. One canister is equal to 8 fuel units, and a Hydrazine Thruster can mount up to 3 canisters for a total of 24 fuel units. Using the thruster costs 1 fuel unit to take off and 1 fuel unit for interplanetary travel, while landing does not consume fuel. Outside of a spacecraft, a canister can fire a Hydrazine Thruster for 12.7 seconds. It can also fuel a single Hydrazine Jet Pack for 133 seconds in total, and a VTOL for 266 seconds in total.

Hydrazine is also used in chemistry and manufacturing. A partially used canister can still be used to make graphene in the Chemistry Lab, even if it appears unlit in the lab interface. The resource is therefore useful even after it has been partially consumed for travel. In addition, Hydrazine has a crafting presence beyond propulsion, though the available source recipes are not listed here.

A few practical notes make Hydrazine safer and more efficient to use:

• Hydrazine used to be stored in a Canister like Soil, but it became an independent resource in the Crafting Update.
• A Medium Fluid & Soil Canister can be filled directly from 24 Hydrazine canisters. When emptied into it, the Hydrazine Canister disappears, and a new one is created again when the container is set to enable output.
• Hydrazine is based on the real-world inorganic compound N2H4, which has historically been used as rocket fuel or as part of rocket fuel mixtures.
• Explosive plants on Atrox can destroy Hydrazine carried in a backpack or attached to a thruster when landing with a shuttle, which can leave the player unable to continue traveling.
• Hydrazine explodes in a larger radius than some other explosive materials, but it must be triggered by a nearby explosion or placed into an active explosive setup to detonate.

Its combination of travel utility, crafting use, and explosive risk makes Hydrazine one of the most important and potentially dangerous resources to manage carefully.