... formula: NA2SO4CAS NO.: 7757-82-6EINECS NO.: 231-820-9HS CODE: 2833.110000Specification:ITEMSTANDARDsodium sulphate (Na2SO4), %:99.0 MIN.water insolubles ... (as Mg), %:0.15 MAX.chlorides(Cl) , %:0.35 MAX.iron(Fe) , %:0.002 MAX.moisture , %:0.20 MAX.Whiteness, %:82 ...