Trivoris was a lethal nerve gas. One canister of Trivoris could cover a square kilometer, with one hundred percent lethality inside of ten minutes. The gas was neutralized by firazene, making it completely useless.
By 3643 BBY during the Cold War, defectors from the Republic's Havoc Squad, led by Harron Tavus, attempted to purchase canisters of Trivoris from the Black Sun within the Black Sun territory of Coruscant. The current commanding officer of Havoc Squad successfully neutralized the gas with Firazene.