[S] Yellow powder
Sulfur 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. Click here to learn about different types of sulfur.
[NaC7H5O3] Ultra-fine, white powder
Sodium salicylate is used as a fuel in whistle composition.
Air-milled, USP grade powder. 99.68% pure (.002% heavy metals; 0.5% water; 0.15ml sulfite or thiosulfate). 99.0% purity.