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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]
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specification
name of index
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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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