- 1. Specifications of Sodium Hydrosulphite :
Item | 90% | 88% | 85% | food grade |
Na2S2 O4 | ≥ 90% | ≥ 88% | ≥ 85% | ≥ 85% |
(Fe) | ≤ 20ppm | ≤ 20ppm | ≤ 20ppm | ≤ 20ppm |
(Zn) | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm |
Clarity | Clarify | Clarify | Clarify | Clarify |
EDTA | - | - | - | Qualified |
(As) | - | - | - | ≤ 1ppm |
Other heavy metals(pb) | - | - | - | ≤ 1ppm |
HCHO | - | - | - | ≤ 0.05% |
water insoluble matter | ≤ 0.05% | ≤ 0.05% | ≤ 0.05% | - |
- 2. Characteristics of Sodium Hydrosulphite :
1)Appearance white free-flowing crystal powder
2)Smell:flavourless or smell of sulfur dioxide
- 3. Uses of Sodium Hydrosulphite:
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.
3It 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.
- 4. Package of Sodium Hydrosulphite :
50kg/Iron Drum, 21.6MT/20'FCL
