6.2sq km exploitable underground salt area exploitble storage of 200000000 tons Salt, Refined salt, PDV salt ISO 9001-2008 Salt, Refined salt, PDV salt6.2 sq ... used in soda,chilorine,NaOH,melting,leatherand so on.Specification: white ≥85.4Size % ≥0.15∼0.85mm92Nacl≥99.14Water ≤0.03Water ... +, Mg+,(%)<=0.250.40(SO4)2-,(%)<=0.300.50 PDV Salt,rock salt,industrial grade,Nacl,99.1%min