Sodium Hydrosulfite
CAS: 7775-14-6
MF: Na2O4S2
Specification:
|
Guidelines |
90% |
88% |
85% |
|
Na2S2O5 |
≥90% |
≥88% |
≥85% |
|
Fe |
≤20ppm |
≤20ppm |
≤20ppm |
|
Zinc (Zn) |
≤1ppm |
≤1ppm |
≤1ppm |
|
Other heavy metal
(With Pb to calculate) |
≤1ppm |
≤1ppm |
≤1ppm |
|
Matter which does not dissolve in water |
≤0.05% |
≤0.05% |
≤0.05% |
|
Storage time limit(month) |
12 |
12 |
12 |
Usage:
·Widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, textile
textile bleaching .
·It is also used in bleaching paper pulps , especially mechanical pulps, it’s the most fittable
bleaching agent in pulps.
·It is used in bleaching kaolin clay, fur bleaching and reductive whitening, bleaching of bamboo
products and straw products,
·It is used in mineral, the compound of thiourea and other sulphides.
·It is used as reducing agent in chemical industry.
·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.
