SZSE：002741
Chemical Reagents
Potassium metabisulfiteCOA Report
  • CAS No.：16731-55-8
  • Molecular weight：222.33
  • Aliases：Potassium disulfite,Potassium pyrosulfite
  • Molecular formula：K2S2O5
  • EC No.：240-795-3
  • HS-No：28322000
Information
Specification category：
Product No. Product name specifications
1.01890.010 Potassium metabisulfite AR500g
1.01890.020 Potassium metabisulfite CP500g
1.01890.040 Potassium metabisulfite Spec25kg
Characteristic： Appearance and properties: Colorless solid,slight spicy.
pH value: 3.5~5(400g/L H2O,20℃)
Melting point(℃): 190
Bulk density(kg/m3):1000~1200
Thermal decomposition temperature(℃): >150
Logarithm of octanol/water partition coefficient: -4.0
Solubility: Soluble in water(335g/L,20℃),insoluble in ethanol.
Technical indicators：
Item AR CP
Assay(K2S2O5) ≥95.0% ≥94.0%
Clarity of solution Pass Pass
Insoluble matter in water ≤0.005% ≤0.02%
Chloride(Cl) ≤0.005% ≤0.01%
Iron(Fe) ≤0.0005% ≤0.002%
Arsenic(As) ≤0.0001% ≤0.0003%
Heavy metals(as Pb) ≤0.001% ≤0.002%
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