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Potassium ferricyanide
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Potassium Metabisulfite
Sodium metabisulfite
45%potassium sulfite
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50%Potassium thiosulfate
 
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Potassium Metabisulfite

Synonyms:  Potassium metabisulphite; Potassium metabisulfite; Potassium pyrosulfite; Potassium pyrosulphite; 
                       potassium disulfite 
Molecular formula: K2S2O5
Molecular weight: 222.326               
CAS No.: 16731-55-8               EINECS No.: 240-795-3               H.S.Code: 28322000
Properties: White crystals with strong sulphur dioxide smell, soluble in water, In aqueous solution, it is in the form of potassium bisulfite (KHSO3), which exerts a strong reducing effect. Solutions of this nature are rapidly oxidized on standing in air.

FOOD GRADE  /  REAGENT GRADE

Items

Specifications

Unit

Food grade E224 /  FCC

Reagent grade

    Purity  [  K2S2O

g/100 g

97.2  min.

98.0  min.

    SO2      

g/100 g

56.0  min.

    K2S2O3

g/100 g

0.1  max.

    Na

g/100 g

2  max.

    Cl-

g / kg

0.5  max.

0.005  max.

    PH value [ 10% solution ]

3.8 - 4.8

    Heavy metal  [ as per Pb  ] 

mg / kg

10  max.

10  max.

    As

mg / kg

1  max.

1  max.

    Cu  

mg / kg

1  max.

    Fe 

mg / kg

5  max.

5  max.

    Hg 

mg / kg

0.1  max.

    Pb

mg / kg

1  max.

    Se

mg / kg

1  max.

    Zn

mg / kg

1  max.

    K2SO3 + K2SO4

remainder

Note: special specifications are available for customers with special requirements

Application: Mainly used in  foodstuffs industry as a preservative , for the treatment of wine after fermentation has ended. for the removal of moulds from freshly selected grapes before pressing. also used in  pharmaceutic materials, photochem, bleaching, etc.
Packing:  In kraft paper bags / LDPE bags of 25 kgs net,  or in 1 kg Aluminium foil bags / 2.5 kgs bottles etc.
Transportation & storage:  It can not be exposured in open air or under the sunlight,  must be stored under ventilating, drying,  never mix stored with gasoline, acids, oxidants and other inflammable substances etc. 

   
   

 

 
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