Sodium hydrosulfite 85%88%90% 1.CAS No.: 7775-14-6 2.MF: Na2S2O4 3.Appearance: White Crystal Powder 4.50kgs in iron drums

Sodium hydrosulfite 85%88%90%

1) We are second biggest manufacturer in China 2) Producing Method: Sodium Formate Process

3)Specifications:

Items	Index
	Tech Grade			Food Grade
Na2S2O4, %  ≥	85%	88%	90%	85%
Fe, ppm  ≤	20	20	20	---
Zn, ppm  ≤	1	1	1	1
As, ppm ≤	---	---	---	1
Heavy Metal(as Pb), ppm  ≤	---	---	---	1
Water Insolubles, % ≤	0.4	0.4	0.05	0.05

4)Package: 50kgs iron drums with double inner polybags

5).Usage:(1). Widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, 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.

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Sodium Hydrosulfite 85%88%90%