... smelting, surface treatment etc. Sodium Sulfate AnhydrousSynonyms: Disodium sulfate; sodium sulfate anhydrous; sulfuric acid, disodium salt; sodium sulfate; Speed-dry, sodium sulphate anhydrousMolecular formula ... (as Mg), %:0.15 MAX.chlorides(Cl) , %:0.35 MAX.iron(Fe) , %:0.002 MAX.moisture , %:0.20 MAX.Whiteness, %:82 ...