8 Year Exporter Benzo Fast Black G Cas 6428-31-5 - Calcium Hydrosulphite – LEADING
8 Year Exporter Benzo Fast Black G Cas 6428-31-5 - Calcium Hydrosulphite – LEADING Detail:
Sodium hydrosulphite
General name: Sodium hydrosulphite
Molecular formula: Na2S2O4
Appearance:white free-flow crystal powders
Smell:flavourless or smell of sulfur dioxide
Packing:50kg net iron drums with double inner polybags.
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, 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.
6. Sodium hydrosulfite food additive grade is used in foodstuffs, as bleaching agent and preservative dried fruits, dried vegetable, vermicelli, glucose, sugar, rock sugar, caramel, candy, liquid glucose, bamboo shoots, mushrooms and canned mushrooms.
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 |
Product detail pictures:

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Our company promises all buyers of the first-class products and solutions as well as most satisfying post-sale support. We warmly welcome our regular and new shoppers to join us for 8 Year Exporter Benzo Fast Black G Cas 6428-31-5 - Calcium Hydrosulphite – LEADING , The product will supply to all over the world, such as: Paraguay, Buenos Aires, Guatemala, Welcome to visit our company and factory, there are various products displayed in our showroom that will meet your expectation, meanwhile, if you are convenient to visit our website, our sales staff will try their efforts to provide you the best service

The factory technical staff gave us a lot of good advice in the cooperation process, this is very good, we are very grateful.
