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Chemical Reagents
Chromium(Ⅲ) potassium sulfate dodecahydrateCOA Report
  • CAS No.：7788-99-0
  • Molecular weight：499.40
  • Aliases：Alum chrome
  • Molecular formula：KCr(SO4)2·12H2O
  • EC No.：233-401-6
  • HS-No：28333000
Information
Specification category：
Product No. Product name specifications
1.01774.010 Chromium potassium sulfate dodecahydrate AR500g
1.01774.020 Chromium potassium sulfate dodecahydrate CP500g
1.01774.030 Chromium potassium sulfate dodecahydrate AR25kg
1.01774.040 Chromium potassium sulfate dodecahydrate CP25kg
1.01774.040 Chromium potassium sulfate dodecahydrate CP25kg
Characteristic： Appearance and properties: Deep violet,odorless solid.
pH value: 3(50g/L H2O,20℃)
Relative density: 1.83(water=1)(20℃)
Melting point(℃): 89
Concentration: Pure
Solubility: Soluble in water (4eq. cold water or 2eq. hot water) and dilute acid,insoluble in alcohol.
Technical indicators：
Item AR CP
Assay[KCr(SO4)·12H2O] ≥99.5% ≥99.0%
Insoluble matter in water ≤0.005% ≤0.01%
Chloride(Cl) ≤0.002% ≤0.005%
Ammonium salt(NH4) ≤0.01% ≤0.03%
Aluminum(Al) ≤0.02% ≤0.05%
Iron(Fe) ≤0.005% ≤0.02%
Heavy metals(as Pb) ≤0.002% ≤0.01%
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