Products are mainly used in sewage treatment, water supply and drainage purification, industrial wastewater treatment, alumina production in the metallurgical industry, inorganic salt, organic chemicals, pesticides, chlor-alkali production in the chemical industry, printing and dyeing in the textile industry, viscose fiber production, and light industry In papermaking and other fields, it is used in the dye industry to produce sulfur dyes, in the tannery industry it is used to hydrolyze hides and skins to remove hair, in the textile industry it is used to denitrify man-made fibers and reduce nitrates, and as a mordant for dyeing cotton fabrics. Used in the manufacture of sulfur dyes, leather depilatories, metal smelting, photography, rayon denitration, etc.
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