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Potassium carbonate

Potassium  carbonate

Molecular formula: K2CO3
Molecular weight: 138.21
CAS NO: 584-08-7
[Character] White powder or granule, relative density of 2.428, melting point of 891℃, easy to deliquesce, soluble in water solution and alkaline, insoluble in ethanol and ether.
[To use] Used as an analytical reagent, such as a reference reagent, silicate flux, carbon dioxide gas absorbent, and preparation of potassium salt.
[Standard]

Specification

Name of index

Analytically pure-AR Chemically pure-CP
Content(K2CO3) /% ≥99.0 ≥98.0
Clarity test Qualified Qualified
Loss on drying 1.0 2.0
Water insolubles ≤0.005 ≤0.03
Chloride(Cl) ≤0.003 ≤0.01
Sulfur compounds(SO4) ≤0.003 ≤0.01
Total nitrogen(N) ≤0.001 ≤0.01
Phosphate and silicate(SiO3) ≤0.005 ≤0.02
Sodium(Na) ≤0.05 ≤0.1
Magnesium(Mg) ≤0.002 ≤0.005
铜(Cu) ≤0.0005 ≤0.001
Calcium(Ca) ≤0.002 ≤0.02
Ferrum(Fe) ≤0.0005 ≤0.002
Lead(Pb) ≤0.0005 ≤0.001

[Packing] Plastic inside and outside woven, kraft paper bag or cardboard bucket, net weight 25kg.

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