Specifications

Test Item	Standard Specification （25℃）
Purity	≥98%
Water insoluble%	≤0.03%
Fe%	≤0.003%
PH	7-9
Nacl%	≤0.2%
sulphide%	≤0.003%
Appearance	Colorless crystal or white powder

Packing And Storage

1. Packing:   25kg /bag , or according to the customers' demand.

2. Storage:   Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and handle with care.

Application

1.  Fixing agent in photography

2.  Reducing agent for dichromate in tanning

3.  Neutralizing agent for nitrogen-containing tail gas

4.  Mordant, bleaching agent for wheat straw and wool

5.  Dechlorinating agent for pulp bleaching.

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