Shandong Libaode Chemical Co., Ltd.

Potassium metabisulfite

• Category :

  Agrochemicals

• Synonyms :

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

• CAS NO :

  16731-55-8

• EC NO :

  240-795-3

• Molecular Formula :

  H₂KO₅S₂

• Molecular Weight :

  185.2412

• Main Specifications :

• InChI :

  InChI=1/K.H2O5S2/c;1-6(2)7(3,4)5/h;(H,1,2)(H,3,4,5)

• Product description :

  executive standard: european food grade  potassium metabisulfite E224
  molecular formula: K₂S₂O₅=222.326
  molecular weight: 222.33
  CAS Number: 16731-55-8
  Product characteristics: The Product was colorless crystal or white crystalline powder with the relative density of 2.34 .The melting point was 150-190^oC(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

  Product usage
  the product was used for the preparation of photographic developing solution, which was also used as food bleaching agents, preservatives, antioxidants .In addition, it could be used to retain freshness of wine, fruit juice, beer clarifying agent, fruits and vegetables, meat , grapes, as well as the non-cyanide silver plating.
  
  Product package:
  25 kg per bag, composite bag lined with plastic bag, or by user's request.

• Molecular Structure :