Industrial grade, sodium bisulfite

Model 
 020-RZ 
 Content 
 99.5% (%) 
 Manufacturer / origin 
 Tianjin 
 Use level 
 Industrial 
 Granularity 
 80 (mesh) 
 Implementation of quality standards 
 IS 248-1971 
 CAS Number 
 7631-90-5 
 Brand 
 RZ 






 Guangzhou supply: sodium bisulfite 

 Chinese alias: weight sodium sulfite, sodium sulfite acid 

 Formula: NaHSO3 Molecular weight: 104.06 Properties: White monoclinic crystal. Sulfur dioxide odor. The relative density of 1.48. Easily exposed to air oxidation. Soluble in water, slightly soluble in ethanol. The aqueous solution (1%) of the pH value of 4.0 ~ 5.5 thermal decomposition, showing strong reduction. 

 Name of index 

 Industrial level 

 Industrial two 

 Purity (SO2 dollars),% ≥ 

 60.0 

 58.0 

 pH (5% solution) 

 4.0 to 4.5 

 4.65 to 5.5 

 Water insoluble,% ≤ 

 0.02 

 0.05 

 Iron (Fe),% ≤ 

 0.01 

 0.02 

 Heavy metals (as Pb)% ≤ 

 0.02 

 0.1 

 Main purposes: for organic cotton and bleaching. Dye, paper, leather, chemical synthesis industry as reducing agent. Pharmaceutical industry for the production of intermediates dipyrone and aminopyrine. Food-grade products as bleaching agents, preservatives, antioxidants. 

 [For details, please call 13925125836 Yang Lu Zi] CAS No. 7631-90-5 IS 248-1971