Sodium Pyrosulfite 7681-57-4

  • CAS No.: 7681-57-4
  • Type.: Others
  • Appearance: White or light yellow crystalline powder
  • Molecular Formula: Na2S2O5
  • Shelf Life: 2 Years
  • Min Order Quantity: 1 ton
  • Specification
  • Application
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Industrial Grade
Project Target Test Result
Content(As Na2S2O5) (≥)  97.0% 97.36%
SO2 (≥)  65.0% 65.91%
Iron(Fe) (≤)  0.002 0.0017%
As (≤)  0.0001% 0.0001%
Water Insoluble Matter (≤)  0.02% 0.01%
PB (≤) 0.0005% 0.00048%
PH 4-4.8 4.53
 
Food Grade
Project Target Test Result
Content(As Na2S2O5), % ≥96.5 97.06
Iron(Fe), % ≤0.003 0.0014
Arsenic (As), % ≤0.0001 <0.0001
Heavy Metal (Pb), % ≤0.0005 <0.0005
Water-Insoluble, % ≤0.05 0.03
(1) In food processing, Sodium Pyrosulfite is used as preservative, bleaching agent and loosening agent. Sodium Pyrosulfite can be used for canned preserves, biscuits, sugar, ice sugar, sugar, candy, glucose, liquid glucose, bamboo shoots, mushrooms and mushrooms.

(2) In pharmaceutical industry, Sodium Pyrosulfite is used for the production of chloroform, phenylpropanone and benzaldehyde.

(3) In rubber industry, Sodium Pyrosulfite is used as coagulant.

(4) In printing and dyeing industry, Sodium Pyrosulfite is used as a dechlorination agent for cotton cloth after bleaching, and a cotton textile finishing agent.

(5) In Leather processing and leather industry, Sodium Pyrosulfite can make leather soft, plump and tough, with waterproof, bending resistance, wear resistance and other properties.

(6) In chemical industry Sodium Pyrosulfite is used to produce hydroxyvanillin, hydroxylamine hydrochloride and so on.

(7) In photosensitive industries, Sodium Pyrosulfite is used as developing agents.
 
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