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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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