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Potassium metabisulfite

CAS No: 16731-55-8

EINECS No.:240-795-3

molecular weight:222.32

M. F.:K2S2O5

Character:White or colorless crystals, or a white crystalline powder or granules. Typically it has sulfur odor, relative density (d145) 2.300. Decomposition at150℃.Gradually oxidized to sulphate in air. Produces sulfur dioxide gas in acid. Soluble in water, insoluble in alcohol, insoluble in ether. PH 1% aqueous solution is 3.4 to 4.5.  strong reduction.

 

Specification:

Items

Unit

Standards

K2S2O5

g/100g

≥93.0

Pb

mg/kg

≤2

Se

mg/kg

≤5

Fe

mg/kg

≤10

As

mg/kg

≤2

Heavy Metal(in Pb terms)

mg/kg

≤5

Application

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 weel as the non-cyanide silver plating.

Package: 25kg/bag

Storage : keep the goods in dry and cool place

 

 

Hotsale:
0086-731-85518151

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