Profile: Tianjin Ruister International Trade Co., Ltd. is a specialized manufacturer of sodium sulphide and anhydrous sodium sulphate. Our products include sodium hydrosulfide, formic acid, sodium formate, sodium hydroxide, sodium bicarbonate, soda carbonate, oxalic acid, citric acid, manganese carbonate, calcium chloride, sodium sulphite, sodium metabisulfite and sodium bisulphite. Sodium hydrosulfide is a colorless needle-like crystal. It is used in the synthesis of organic intermediates and in the preparation of auxiliary agent of sulfur dyes. It is used in the leather industry for the removal of hair from hides. It is the raw material to produce ammonium sulphate and ethanethiol in the waste treatment. Formic acid is a colorless liquid with pungent odor, miscible with water and alcohol solvents. It is mainly applied in the pharmaceutical, pesticide, chemical, leather, rubber, steel, and paper industries. Sodium formate is a white crystalline powder, with slight hygroscopic and slight formic acid odor. It dissolves in water, and lightly dissolves in ethanol. It can be used as formic acid, oxalic acid, sodium hydrosulfite, and leather tanning agent. We export our products to various countries worldwide.