Sankyo Kasei Co., Ltd.

We started our business over 100 years ago in Japan, for the manufacture of sodium sulfide by the charcoal reduction of sodium sulfate. Sulfur inorganics still make up 25% of our sales and we are the one and only supplier of colorless pure crystalline sodium sulfide in the world, which is used for the manufacture of advanced optical materials.Against the background of inorganic sulfur chemis...