1.It is used as bleaching agent, mordant, reducing agent, rubber coagulant, and also used in organic synthesis, pharmacy, spices, etc
2.It is used as chromatographic analysis reagent, antiseptic and reducing agent, dye and pharmaceutical industry
3.Sodium pyrosulfite has stronger reducibility than sulfite, and its effect is similar to that of sodium sulfite. Our country stipulates that it can be used for candied fruits, biscuits, sugar, crystal sugar, malt sugar, candy, glucose, liquid glucose, bamboo shoots, mushrooms and canned mushrooms, with the maximum use amount of 0.45g/kg. The residue (calculated by SO2) of candied fruits, bamboo shoots, mushrooms and canned mushrooms, grapes and blackcurrant concentrated juice is less than 0.05/kg; The residue of biscuits, sugar, vermicelli and other varieties is less than 0.1g/kg; The residual amount of liquid glucose shall not exceed 0.2g/kg.
4.Food industry is used as bleach, antiseptic, loose agent, antioxidant, color fixative and fresh-keeping agent.
5.The pharmaceutical industry is used to produce chloroform, phenylsulfone and benzaldehyde. The rubber industry is used as a coagulant. The printing and dyeing industry is used as a dechlorination agent after bleaching of cotton cloth and a cotton scouring auxiliary. The leather industry is used for leather treatment, which can make the leather soft, plump, tough, waterproof, folding resistant, wear-resistant and other properties. Chemical industry is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc. The photosensitive industry is used as developer, etc.
6.For analysis. preservative. Reducing agent. Antioxidant

Dongdu Biology is a company that develops and sells high-end chemicals. Our company aims to provide all-round and professional technical solutions and products and services for domestic and foreign customers in line with the principle that professionals do professional things; The company has its own independent research and development team, perfect experimental facilities and advanced testing instruments, and at the same time, it is equipped with complete production equipment for product extraction, separation, synthesis, fermentation and strict quality control system to ensure the stability of product quality from all aspects.

The company has 10, 000-level and 100, 000-level purification workshop that meet GMP standards, and fully automatic production equipment. The high quality and reasonable cost of our products have won warm welcome from many customers. From material procurement, production process to product testing, we have established a strict quality standard inspection system. Every link from packaging, delivery, shipment to transportation has been inspected at different levels. Pursuing excellent quality is the core driving force of our development, and serving customers wholeheartedly is our eternal purpose!

Division I provides customized packaging, customized production and other personalized customized services, and supports various modes of transportation such as land, sea and air, and strives to bring customers a quality cooperation experience. Our products are popular in North and South America, Europe and Southeast Asia. We look forward to cooperating with new and old customers.