Usage:

　　1、Bleaching agents, preservatives, leavening agents, antioxidants and food preservation in the food industry. Also used in pharmaceutical synthesis. As a reducing agent in the production of dehydrated vegetables.

　　2、As a preservative and a cosmetic antioxidant for hair dyes'and cosmetics. Used to block the oxidation of dyes in hair dyes. It is also used in other cosmetics and food industries.