Sodium Hydrosulfite

1.      Molecular formula: Na2S2O4

2.      Appearance: white free-flow crystal powders

3.      Standard:HG2074-2004, JISK1476-1995, HG/T2682-1995

4.      INDEX 90% 88% 85% FOOD ADDITIVE

5.      Packing£º15kg, 25kg ,50kg or 100kg net in iron drums with double inner polybags.

6.      Usage: 1. Widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, textile textile bleaching .

           2. It is also used in bleaching paper pulps , especially mechanical pulps, it’s the most fittable bleaching agent in pulps.

           3. It is used in bleaching kaolin clay, fur bleaching and reductive whitening, bleaching of bamboo products and straw products,

         4. It is used in mineral, the compound of thiourea and other sulphides.

5. It is used as reducing agent in chemical industry.

7. Specification: 

INDEX 90% 88% 85% FOOD ADDITIVE Na2S2O4 ≥90% ≥88% ≥85% ≥85% Fe ≤20ppm ≤20ppm ≤20ppm ≤20ppm Zinc£¨Zn£© ≤1ppm ≤1ppm ≤1ppm ≤1ppm Other heavy metal £¨calculated as Pb£© ≤1ppm ≤1ppm ≤1ppm ≤1ppm Water Insolubles ≤0.05% ≤0.05% ≤0.05% ≤0.05% Shelf Life(month) 12 12 12 12 £¨Analysis report£©: ITEM 90% 88% 85% FOOD ADDITIVE Na2S2O4 91.00% 89.50% 86.60% 86.96% Na2S2O5 6.39% 6.64% 6.82% 6.54% Na2CO3 1.10% 2.50% 5.70% 5.58% Na2S2O3 0.18% 0.20% 0.41% 0.38% Na2SO3 0.22% 0.21% 0.32% 0.36% Fe 14ppm 15ppm 16ppm 11ppm Water Insolubles 0.05% 0.04% 0.04% 0.01%

8. H. S. CODE: 28311000

9. CAS No.: 7775-14-6