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Place of Origin
HS-CODE
28-
Package & Delivery Lead Time
Detailed 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 ℃ (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.
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