Name:

Appearance:

White Free Flowing Fine Crystal or Powder

Specification:

Industrial grade

      1) Purity (calculated with Na2S2O5): 95%

      2) Iron (Fe): 0.005%

      3) SO2: 65%

      4) PH value: 4.0-4.6

      5)Water insoluble matter: 0.05%

Foodstuff grade

     1) Purity (calculated with Na2S2O5): 95%

     2) Iron (Fe): 0.0005%

     3) Arsenic (As): 0.0002%

     4) pH value: 4.0-4.6

     5) Water insoluble matter: 0.05%

     6) Heavy metal (Cal. in Pb): 0.002%

Package:

25kg, 50kg pp woven bag with plastic lining, or 1000kg per package

Usage:

1.Dye printing mordant.
 

2.Textile antichlor after being bleached.

3.Reducing agent and sulfonating agent for chemical     and medical use.
 

4.Bamboo, wood, paper fiber bleaching agent, non-ferrous metal ore dressing agent, waste water treating , rubber freezing agent.