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