a new kind of environmental-protection agent which can be used as exchange of Sodium Hydrosulfite.used 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