... ISO certificate; export 20 billion tons per year, SSA Sodium sulphate 99% -Qingdao central Chemical Co.,LtdThe following is ... the specification for you :*Advantage : Our company production of sodium sulphate powder with high purity, impuritiesless features, by the majority ... , %:84 MIN.PH6-8*Usage : Widely used in sodium sulfide, sodium silicate and other chemical product manufacturing ; used in the ...