... (Na2SO4), %:99.0 MIN.water insolubles , %:0.05 MAX.Ca + Mg (as Mg), %:0.05 MAX.chlorides(Cl) , %:0.1 MAX.iron(Fe) , %:0.002 MAX.moisture , %:0.20 MAX.Whiteness, %:86 MIN ... . ItemValueType IType IIGrade AGrade Asodium sulfate content, Na2SO4 %>99.198.3water insoluble substance %<0.040 ...