Sodium pyrosulfite (Na2S2O5) is an inorganic compound, white or yellow crystal, with a strong pungent odor, soluble in water, aqueous solution is acidic, and contact with strong acid releases sulfur dioxide and generates the corresponding salts. In the air for a long time, it is oxidized into sodium sulfate, so sodium metabisulfite can not be long.

Used in food industry as bleach, preservative, loose agent, antioxidant, color protection and fresh-keeping agent. According to China's GB2760-86 provisions: as a preservative used in fruit wine, the maximum usage of 0.25g/kg; Used as bleach in glucose, sugar, bamboo shoots, mushrooms, etc., shall not exceed 0.45g/kg; The residual amount (SO2) shall not exceed 0.025g/kg in bamboo shoots and mushrooms, 0.05g/kg in fruit wine and sugar, and 0.1g/kg in other varieties.

The pharmaceutical industry is used to produce chloroform, phenylpropanone and benzaldehyde. Rubber industry used as a coagulant.

Printing and dyeing industry used as dechlorination agent after cotton bleaching, cotton cooking auxiliary. Leather industry for leather processing, can make leather soft, full, tough, waterproof, anti-folding, wear and other properties.

Chemical industry for the production of hydroxyvanillin, hydroxyamine hydrochloride and so on. Photosensitive industry used as developer, etc.

Xi'an Jianyuan Chemical Co., Ltd. is specializing in Raw Materials of Chemical, Pharmaceutical and Food industries over than 5 years in China. Our business covers more than 100 countries in America, Europe, Middle East and other areas.

We can offer raw materials with great quality, competitive price, complete certifications, and related usage guidance. We integrated the best factory resources in China, and established long-term cooperative relationships.

We can guarantee the goods can be delivered to customers smoothly and fastly. We established good cooperation with SF Express, ZTO Freight, DHL, FedEx, Maersk, MSC and other domestic and international logistics companies.

Whether pre-sale, in-sale, or after-sale, we can provide our customers with the information and support they need most. We're responsible to the business of our customers.

Our tenet is to achieve our customers, support customers to grow and strengthen their business.

Looking forward to cooperating with the customers from all over the world!

Q1. Can I have a sample order for your product?
A: Yes, we welcome sample order to test and check quality.

Q2. What about the lead time?
A: Usually need 3-5 days, mass production time usually needs 1-2 weeks. The exact lead time need to be confirmed according to exact product and quantity.

Q3. How do you ship the goods?
A: For small quantity, we can ship by DHL, UPS, FedEx or TNT to make it fastest to arrive. For big quantity, we can ship by air, sea, train according to exact situation. We also support DDP shipping.

Q4. How to proceed an order?
A: 1.let us know your requirements or application.