... .6Insoluble in water % Max0.05 ALIAS: Sodium Hydrosulphide ,Sodium Hydrogen Sulphide, Sodium Hydrogen Sulfide, Sodium Sulfhydrate, Sodium Bisulphide.Predominance:mainly used by mill run, ... not easy to be intenerated,especially less iron , sodium sulfide, sodium carbonate, Insolubles impurity in water.dip-dying in ... . Separated from acids, acidic materials, oxidizing agents. Sodium hydrosulfide flake