... 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 ... such as antidote for poisoning. In addition, in the textile, leather, non-ferrous metallurgy, enamel, also has application ...