| Customization: | Available |
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| CAS No.: | 7757-83-7 |
| Formula: | Na2o3s |
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Sodium sulfite is commonly known as sulfur oxide powder, there are two kinds of sodium sulfite and sodium sulfite heptahydrate. Anhydrous sodium sulfite is white powder; Sodium sulfite heptahydrate is colorless or slightly yellow crystal, easily soluble in water, the aqueous solution is alkaline, easy to weather in the air and be oxidized to sodium sulfate. Sodium sulfite is widely used in industrial and civil fields. It is one of the important pulping methods in the paper industry to cook plant fiber with sodium sulfite cooking solution at a certain temperature and pressure, and the paper industry is also the industry that consumes the most sodium sulfite products. Sodium sulfite is widely used to remove dissolved oxygen from water because of its low price, convenient source and fast reaction rate with oxygen. Sodium sulfite is used for leather treatment, can make leather soft, full, tough, waterproof, anti-folding, wear and other properties. Sodium sulfite is a widely used food additive permitted by the state, which can be used as bleach, preservative, loose agent, antioxidant, color protection and fresh-keeping agent for food processing.Sodium sulfite is an inhibitor of polyphenol oxidase (PPO) activity, which can effectively protect the Browning of fruits and vegetables.
| Item Item | Superior Grade | First Grade | Qualified Grade |
| Sodium Sulfite (Na2SO3) Content (%) | ≥97.0 | ≥96.0 | ≥93.0 |
| Iron (Fe) Content (%) | ≤0.003 | ≤0.005 | ≤0.02 |
| Insoluble Matter in Water (%) | ≤0.05 | ≤0.10 | ≤0.20 |
| Heavy Metals (as Pb) (%) | ≤0.001 | ≤0.002 | ≤0.005 |
| Appearance | White crystals or powder | White crystals or powder | White crystals or powder |
1. Chemical Reagents
• Analytical Reagent: In analytical chemistry, sodium sulfite is used as a standard reagent for qualitative and quantitative analysis.
• Synthetic Raw Material: It is used to synthesize other chemicals, such as sodium metabisulfite.
2. Photography and Sensitizing Industry
• Developer: Sodium sulfite is used as a developer in the production of photographic and sensitizing materials, where it reduces silver salts
3. Other Applications
• Rubber Industry: In rubber production, sodium sulfite acts as a vulcanizing agent, enhancing the elasticity and wear resistance of rubber.
• Leather Industry: It is used in leather processing to prevent oxidation and deterioration of leather.
Packaging
25kg/Ton Bag, PP+PE Bag
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