Potassium metabisulfite

• Post Date:

  Jul 26,2017

• Expiry Date:

  Oct 24,2017

• Detailed Description:

  Cas No. :16731-55-8 Quantity: 20Metric Tons
  Specs:97%
  Payment Method: T/T AT ADVANCE
  Product characteristics: The Product was colorless crystal or white crystalline powder with the relative density of 2.34 .The melting point was 150-190 ℃ (decomposition). The product had a flavor of sulfur dioxide and soluble in water with acidic aqueous solution, it was not soluble in ethanol. Sulfur dioxide was released from acidic solution and oxidized to sulfate in the air.
  Technical index
  Test item Unit Specification Test method
  K2S2O5 g/100g ≥97.2 Acc.Fcc IV p.322
  SO2 g/100g ≥56.0 calculation
  K2S2O3 g/100g ≦ 0.1 ISO 3629-1996(E)
  Na g/100g ≦ 2 AAS
  Cl g/kg ≦ 0.5 IC
  pH-value(10%solution) - 3.8-4.8 RCA/Q-S-066
  heavy metal（measured by Pb） mg/kg ≦10 AAS
  As mg/kg ≦ 1 AAS
  Cu mg/kg ≦1 ICP-AES
  Fe mg/kg ≦5 ICP-AES
  Hg mg/kg ≦0.1 AAS(cold vapour)
  Pb mg/kg ≦1 ICP-AES
  Se mg/kg ≦1 AAS
  Zn mg/kg ≦ 1 ICP-AES
  K2SO3 +K2SO4 mg/kg excess material calculation
  

• CAS Registry Number:

  16731-55-8

• Synonyms:

  ;Disulfurous acid,potassium salt (1:2);dipotassium oxidosulfanesulfonate oxide;sulfanesulfonic acid, hydroxy-, oxide, monopotassium salt;

• Molecular Formula:

  H₂KO₅S₂

• Molecular Weight:

  185.2412

• Molecular Structure:

  

• Company:

  ZIBO CHANGCHENG CHEMICAL FACTORY     [ China ]        

• Contact:

  Wang Gang

• Tel:

  0533-4689683

• Fax:

  0533-4689683

• Email:

  zbccexport@yahoo.cn