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It is one new kind environmental-protection agent which is can be used as exchange of Sodium Hydrosulfite. It widely applies to reduction dyes and sulfur dyes dyeing, wool and silk bleaching, disperse dyes reducing cleaning, dye vat cleaning and so on. And also used in paper making industry as bleaching agent, deinking, waste paper deink, etc. And then used to organic synthesis in synthetic fiber industry, additive of polythene sensitizer of photographical emulsion, noble metal recycling and separates, etc. There is no pollution during the operation.