Sodium Sulphite Anhydrous

Product Identification

• CAS No. : 7757-83-7
• EINECS No. : 231-821-4
• H.S. Code : 2832.100000
• Formula : Na2SO3
• Molecular Weight : 126.04
• Toxicity : Oral mouse LD50: 820 mg/kg
• Synonyms : Sodium Sulfite Anhydrous; Disodium Sulfite; Natrii Sulphis; Natrium Sulfurosum;
• Natriumsulfit (German); Sulfurous Acid, Disodium Salt;

Physical And Chemical Properties

• Physical State : White crystalline powder
• Melting Point : Decomposes
• Specific Gravity : 2.633
• Solubility in water : good
• PH : 9
• Vapor Density : 4.35
• NFPA Ratings : Health: 1 Flammability: 0 Reactivity: 0
• Stability : Stable under ordinary conditions

Applications

• Pharmaceutical industry for the production of chloroform, benzene, styrene sulfone, formaldehyde.
• Rubber industry as a coagulant.
• Bleached cotton printing and dyeing industry as the dechlorination agent, cotton scouring agent. It can prevent the partial oxidation of cotton cloth fiber and influence the fiber strength.
•   Leather tanning industry for processing make the leather soft, plump, tough, waterproof, bending, wear and other properties.
• The chemical industry for the production of vanillin hydroxyl, hydroxylamine hydrochloride and so on.
• Photographic Industry as a developer, etc.
• The food industry as a bleaching agent, preservatives, leavening agent, antioxidant, color agents and the insurance agent. as reducer in producing dehydration vegetables.
• Electronics industry for the manufacture of photosensitive resistance.
• Paper-making, Electronic, Water-treatment for electroplating wastewater, drinking water, etc.

Specification

• Testing Items / Quality Standard Type (1) / Quality Standard Type (2)
• Appearance : White crystalline powder / White crystalline powder
• Purity NA2SO3 : 97% Min / 93% Min
• Water Insoluble : 0.02% Max / 0.03% Max
• Fe : 0.003% Max / 0.005% Max
• Free Alkali, as NA2CO3 : 0.1% Max / 0.4% Max
• Sulphates, as NA2SO4 : 2.5% Max / -
• Chlorides, as NACL : 0.1% Max / -

Transportation

• Storage : Stored in cool and dry place, avoid moisture and heat
• Packing : In 25kgs /50kgs /1000kgs net p.p. woven bags

Other Trade Information

• Min. Order Quantity : 25 MTS
• Supply Capacity : 22,000Mts /Year
• Loading Capacity : 27Mts/1080Bags (1x20'FCL)
• Port of Loading : Huangpu / Hengyang / Tianjin, China
• Fresh Stocks : Yes
• Ref. Price : USD305.- ~ USD520.- /MT FOB Huangpu / Tianjin, China
• Shipment Time : Within 2-3 weeks upon receipt of advance payment or L/C .
• Payment Terms : T/T, L/C ( Sight / 90days ), D/P, Western Union
• Origin : Hunan, Tianjin
• Sample Availability : Yes
• Main Export Markets : India, Indonesia, Thailand, Pakistan, Bangladesh, Iran, Argentina, Turkey