Physical and chemical properties:
Sodium Hydrosulfite (Sodium Dithionite) is white crystalline powder, no odor or slightly Sulfur Dioxide odor, easily soluble in water, water solution is not stable, insoluble in alcohol.
Relative density (water = 1):2.3-2.4.
Bulk density: 0.9-1.2.
Auto-ignition temperature: 250 ℃.
| Appearance: | White crystal powder | White crystal powder |
| Strength: | ≥88.0% | 88.5% |
| Water insolubles: | ≤0.5% | 0.03% |
| Heavy metal content: | ≤1% | 0.3% |
| Na2Co3: | 1.0-5.0% | 2.9% |
| Fe: | ≤20ppm | 12ppm |
Application:
Sodium Hydrosulfite is widely used in the textile industry, used as a reducing agent for vat dye dyeing, reducing bleaching agent, vat dye printing auxiliaries, silk refining and bleaching agent, dye stripping agent and dye vat cleaning agent. It is used as a bleaching agent for mechanical pulp, thermal grinding mechanical pulp and deinked pulp in the paper industry. It is the most suitable bleaching agent for wood pulp papermaking. As a reducing bleaching agent, Sodium Hydrosulfite is widely used in bleaching of kaolin, bleaching and reducing whitening of fur, bleaching of bamboo products and straw products, etc. Used in mineral processing, thiourea and sulfide synthesis. It is used as a reducing agent in the chemical industry.
Physical and chemical properties:
Sodium Hydrosulfite (Sodium Dithionite) is white crystalline powder, no odor or slightly Sulfur Dioxide odor, easily soluble in water, water solution is not stable, insoluble in alcohol.
Relative density (water = 1):2.3-2.4.
Bulk density: 0.9-1.2.
Auto-ignition temperature: 250 ℃.
| Appearance: | White crystal powder | White crystal powder |
| Strength: | ≥88.0% | 88.5% |
| Water insolubles: | ≤0.5% | 0.03% |
| Heavy metal content: | ≤1% | 0.3% |
| Na2Co3: | 1.0-5.0% | 2.9% |
| Fe: | ≤20ppm | 12ppm |
Application:
Sodium Hydrosulfite is widely used in the textile industry, used as a reducing agent for vat dye dyeing, reducing bleaching agent, vat dye printing auxiliaries, silk refining and bleaching agent, dye stripping agent and dye vat cleaning agent. It is used as a bleaching agent for mechanical pulp, thermal grinding mechanical pulp and deinked pulp in the paper industry. It is the most suitable bleaching agent for wood pulp papermaking. As a reducing bleaching agent, Sodium Hydrosulfite is widely used in bleaching of kaolin, bleaching and reducing whitening of fur, bleaching of bamboo products and straw products, etc. Used in mineral processing, thiourea and sulfide synthesis. It is used as a reducing agent in the chemical industry.
