| Product Name | Sodium Hydrosulphite |
| CAS NO | 7775-14-6 |
| HS Code | 2831101000 |
| EINECS NO | 231-890-0 |
| Formular | Na2S2O4 |
Sodium Hydrosulphite Specification
ITEM | STANDARD |
Sodium Hydrosulphite | 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 |
Sodium Hydrosulphite Application
1) It is for vat dyes staining the reducing agent, reducing hair bleaching agents, vat dyes printing auxiliaries, silk scouring
and bleaching agent, dyeing agents and objects of the peel color dye vat cleaning agent in the textile industry.
2,) It is used as a mechanical pulp, mechanical pulp mill hot and deinking pulp bleaching
agent in pulp and paper industry.
3) It is used as sugar, candy, candied fruit, caramel, cookies, fans, etc. Bleach and food preservation agent in the food industry.
4) As a bleaching agent is widely used to restore the kaolin bleaching; Fur whitening bleaching and restore; Bamboo products
and straw products such as bleach.
5) It is used as a reducing agent in chemical industry.
