[S] Yellow powder
Flour (not the same as "flowers"). Used as a fuel, usually in compositions with nitrate oxidizers; as a component of black powder (serving as both a binder and fuel); in rocket propellants as the oxidizer for zinc. Ours is 99.9% pure and has a very low acid content.
PLEASE NOTE THAT ALL CHEMICALS ARE SHIPPED IN A HEAVY DUTY PLASTIC BAG.