1.Purity:90%, 93% , 96%
4.Appearance: white crystal powder
5.HS CODE: 28321000
6.Mol wt : 126.04
Sodium sulfite is packed in net weight 25kg plstic woven bag with plastic inner bag. or as customers' request 25tons/20'FCL.
Bleaching agent for paper pulps, Waste water treatment, Bleaching agent for mining industry, Colors stripper and deoxidization, Auxiliaryn Chemical in tanning process
1. It is used in the production of sulfur dyes in the dye industry, and is the raw material of sulfur blue .
2. also is used as a stain aid for dissolving sulfur dyes in the printing and dyeing industry .
3. for the hydrolysis of raw hide hair removal in the leather industry ,but also for the preparation of sodium polysulfide to speed up the dry skin soft water to help .
4. It is used as cooking agent in paper industry .
5. as rayon denitration and reduction of nitrate content in the textile industry .
6. Also it is the raw material of sodium thiosulfate ,sodium polysulfide ,sulfur dyes and other materials.
|The first type||The second type|
|Premium grade||First grade||Qualified product||Premium grade||First grade|
|Content （Na2S)% ≥||60.0||60.0||60.0||60.0||60.0|
|Na2SO3 % ≤||1.0||-||-||-||-|
|Fe% ≤ ||0.0020||0.0030||0.0050||0.015||0.030|
|Water insoluble matter% ≤||0.05||0.05||0.05||0.15||0.20|