... % Max0.0050.005--AppearanceYellowish FlakeYellowish Flake Synonyms: Sodium Hydrosulphide ,Sodium Hydrogen Sulphide, Sodium Hydrogen Sulfide, Sodium Sulfhydrate, Sodium Bisulphide.Predominance:mainly used by mill run, pesticide ... from being deliquescent. Separated from acids, acidic materials, oxidizing agents. Sodium Hydrosulphide for Mining