Description
Molecular Formula: H2O5S2.2Na
Molecular Weight: 192.12
Structural Formula:
Specification:
Items
Specifications
Melting Point
>300°C(lit.)
Density
1.48
Solubility
540g/l (20°C)
Specific Gravity
1.48
PH
3.5-5(50Chemicalbookg/l,H2O,20℃)
Odor
Sulfur
Water Solubility
540g/L(20ºC)
Sensitivity
Air & moisture sentive
Stability
Stable. Incompatible with strong oxidants and acids. Contact with strong acids will release toxic gases. May be sensitive to moisture and air.
Items | Specifications |
Melting Point | >300°C(lit.) |
Density | 1.48 |
Solubility | 540g/l (20°C) |
Specific Gravity | 1.48 |
PH | 3.5-5(50Chemicalbookg/l,H2O,20℃) |
Odor | Sulfur |
Water Solubility | 540g/L(20ºC) |
Sensitivity | Air & moisture sentive |
Stability | Stable. Incompatible with strong oxidants and acids. Contact with strong acids will release toxic gases. May be sensitive to moisture and air. |
Function:
1. Sodium pyrosulfite has strong reducibility and can react with oxidizing substances such as oxygen.
2. Sulfur dioxide can be released under certain conditions, and sulfur dioxide has a bleaching effect.
3. The sulfur dioxide and sulfite components produced by its decomposition have antibacterial effects.
Application:
1. Used in juice, preserves, cans, wine, beer and other food to prevent food spoilage.
2. It can be used for bleaching of flour, starch, sugar and other food raw materials, and can also be used for color protection in the processing and preservation of light-colored vegetables.
3. It has a loose function, which can make bread, biscuits and other baked goods expand and soft, improve the taste.
4. It has a good antioxidant and fresh-keeping effect on seafood and fruits and vegetables, and can maintain the color, fragrance and nutrition of food.
5. In the chemical synthesis reaction, sodium pyrosulfite is often used as a reducing agent, and can also be used to produce chemical products such as insurance powder, sulfadimethylpyrimidine and caprolactam.
6. It is an important raw material for the preparation of sulfurous oxide sodium, sulfur dioxide and sulfuric acid.
7. Can be widely used in bleaching various types of pulp and paper, such as wood pulp, waste paper, etc.
8. Used as rubber coagulant, dechlorination agent after cotton bleaching,
9. Used for leather treatment, improve the quality and use value of leather.
10. Used as antioxidants, preservatives and excipients in drug production, it can be used to produce some antibiotics and vitamins and other drugs, and can also be used to produce chloroform, phenylpropanone and benzaldehyde.
11. In electroplating wastewater treatment, it can be used to treat wastewater containing hexavalent chromium.
