... , PDV salt ISO 9001-2008 Salt, Refined salt, PDV salt6.2 sq km exploitable underground salt areaExploitble storage of 200,000 ... .021SO4%0.45F(mg/kg)4.8Ba ≤15.00 IndexPurified Industrial(usage) SaltTop gradeA gradeNacl(%) >=99.1098.5water(%)<=0.300.50Water ... insoluble (%)<=0.050.10Ca+, Mg+,(%)<=0.250.40(SO4)2-,(%)<=0.300.50 PDV Salt,rock salt,industrial grade,Nacl,99.1%min