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Potassium carbonate

Product Name: Potassium carbonate

CAS No.: 584-08-7

EINECS No.: 209-529-3

Molecular formula: CK2O3

Molecular weight: 138.21

Properties: Monoclinic crystals, white powder, fine granular crystals or round beads. The relative density is 2.428, and the melting point is 891°C. It is easily soluble in water, and its aqueous solution is alkaline. Insoluble in ethanol and ether. It has strong hygroscopicity, easy to agglomerate, and can easily absorb carbon dioxide into potassium bicarbonate in long-term contact with air.

Executive standard: industrial potassium carbonate (GB/T 1587-2016)

Index name Unit Top grade CPT grade First grade Qualified product
Content (K2CO3) % ≥ 99.0 99.0 98.5 96.0
Chloride (as KCl) % ≤ 0.01 0.03 0.10 0.20
Sulfur compounds ( calculated as K2SO4) % ≤ 0.01 0.04 0.10 0.15
iron % ≤ 0.001 0.001 0.003 0.010
Water insoluble matter % ≤ 0.02 0.04 0.05 0.10
Ignition loss % ≤ 0.6 0.8 1.00 1.00

Specification: Food Additive Potassium Carbonate (HG2452-93)

Index name Unit standard value
Potassium carbonate (K2CO3) % ≥ 99.0
Chloride (as KCl) % ≤ 0.01
Sulfur compounds ( calculated as K2SO4) % ≤ 0.01
Iron % ≤ 0.001
Water insoluble matter % ≤ 0.02
Ignition loss % ≤ 0.6
Arsenic % ≤ 0.0003
Heavy metals (as lead) % ≤ 0.002
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