Binary chemical weapons mix two, separate, relatively non-toxic chemicals in flight to create a toxic chemical agent.
GB Binary
Methylphosphonyl difluoride (DF) is initially located in one canister, while a mixture (OPA) of isopropyl alcohol and isopropyl amine is located in a separate canister. When the weapon is fired (or otherwise delivered), a disk between the canisters ruptures, and the two components react in flight to produce GB.
GD Binary
Methylphosphonyl difluoride (DF) is initially located in one canister, while a mixture of pinacolyl alcohol and an amine is located in a separate canister. When the weapon is fired (or otherwise delivered), a disk between the canisters ruptures, and the two components react in flight to produce GD.
VX Binary
O-Ethyl O-2-diisopropylaminoethyl methylphosphonite (QL) is initially located in one canister, while elemental sulfur is located in a separate canister. When the weapon is fired (or otherwise delivered), a disk between the canisters ruptures, and the two components react in flight to produce VX.