... ,the beautiful seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali ... Skype:areilyu Mobile:0086-18205329887 Website: http://www.centralqd.comSpecification and details: ITEMSTANDARDsodium sulphate (Na2SO4), %:99.0 MIN.water insolubles ... %<0.00150.008moisture, %<0.100.30whiteness, % min8680 The specification of Sodium Sulphate Anhyrous99%