... refined saltISO 9001-2008 Package: 25kg, 50kg, 1mtWhite cubic crystal or crystal powder.Wildly used in soda,chilorine,NaOH,melting,leatherand so ... .021SO4%0.45F(mg/kg)4.8Ba ≤15.00 IndexPurified Industrial(usage) SaltTop gradeA gradeNacl(%) >=99.1098.5water(%)<=0.300.50Water ... .250.40(SO4)2-,(%)<=0.300.50 Natural refined salt industrial grade