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Sodium Hyposulfite

Product Name: Sodium Hyposulfite
CAS No.: 7775-14-6
Molecular Weight: 174.108
Molecular Formula:Na2S2O4
Appearance: White Free-flow Crystal Powder

Specifications:

Index 90% GRADE 88% GRADE 85%
GRADE
Food additive GRADE
Na2S2O4 90% 88% 85% 85%
Water insolubles 0.05% 0.05% 0.05% /
Iron (Fe) 20ppm 20ppm 20ppm 20ppm
Appearance of Aqueous solution Clear Clear Clear clear
Zinc (Zn) 1ppm 1ppm 1ppm 1ppm
Arsenic(As)       1ppm
Other heavy metals (as Pb) 1ppm 1ppm 1ppm 1ppm
Format(as HCHO)  /  / 0.05%
Shelf life(months) 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%


Application:
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, its 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.
6. Sodium hydrosulfite food additive grade is used in foodstuffs, as bleaching agent and preservative in dried fruits, dried vegetable, vermicelli, glucose, sugar, rock sugar, caramel, candy, liquid glucose, bamboo shoots, mushrooms and canned mushrooms.

Usage:

vat dyeing, printing and stripping , reduction cleaning,
leaching textile materials such as silk, wool, nylon and other fibres
bleaching mechanical pulps ,thermo-mechanical pulps, deinked pulps
bleaching kaolin  
bleaching foodstuffs like sugar, honey , gelatin etc .
reducing agent for organic synthesis and pharmaceuticals

Packing:
15kg,20kg,25kg,50kg,100kg,200kg iron drum with double inner polythene bags; 500kg ,1200kg,1800kg intermediate bulk container (IBC)

 
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