Sodium sulfide for the manufacture of sulfur dyes, leather hair Removal agents, metal smelting, photography, such as rayon and Denitrification. Widely used in leather, paper, mineral processing, Dye, organic intermediates, printing and dyeing, pharmaceutical, MSG, Artificial fiber, special engineering plastic, polyphenylene sulfide, Poly base rubber, also used in manufacturing sodium hydrosulfide, And more sodium sulfide, sodium thiosulfate, etc., in the military Industry also has some uses.