Products Description
Sodium hydrosulfite (chemical formula Na₂S₂O₄) is a white powder, mainly used in the textile industry. It helps with dyeing, washing, printing, and color removal, and can also bleach fabrics like silk, wool, and nylon.
Cas: 7775-14-6
Apperance: White crystalline powder
EINECS: 231-890-0
Technical Parameter
| Item | STANDARD | |||
| Hydrosulphite Purity | 74% |
85% |
88% |
90% |
| Water insoluble | 0.3 max | 0.3 max | 0.1 max | 0.1 max |
| Sodium thiosulfate: Na2S2O3 | 1.4 max | 1.5 max | 1.3 max | 1.0 max |
| Sodium metabisulfite: Na2S2O5 | 5-7 | 5-7 | 5-7 | 5-7 |
| Sodium bisulfite:NaHSO3 | 0.5 max | 0.5 max | 0.5 max | 0.5 max |
| Sodium carbonate: Na2CO3 | 0.6-2 max | 0.6-2 max | 0.6-2 max | 0.6-2 max |
| Sodium formate: HCOONa | 0.5 max | 0.8 max | 0.5 max | 0.5 max |
Application
Sodium Hydrosulfite (Na₂S₂O₄) is a powerful bleaching and reducing agent. Main used in the following aspects :
Textiles: For dyeing, cleaning, printing & bleaching fabrics (silk/wool/nylon), keeping colors bright
Food: Safely bleaches gelatin, sugar, preserves - no heavy metals
Other: Bleaches soap, oils, bamboo; reduces dyes & drugs
Paper: Ideal for wood pulp bleaching
Package
50kgs iron drums , 21.6MT/20'FCL
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