| Potassium arsenate | |
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Potassium dihydrogen arsenate |
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Other names
Potassium arsenate |
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| Identifiers | |
| CAS number | 7784-41-0 |
| RTECS number | CG1100000 |
| Properties | |
| Molecular formula | KH2AsO4 |
| Molar mass | 180.033 g/mol |
| Appearance | colourless solid |
| Density | 2.867 g/cm3 |
| Melting point |
280 °C |
| Solubility in water | slightly soluble |
| Refractive index (nD) | 1.5723 |
| Hazards | |
| Main hazards | toxic |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Potassium arsenate is the chemical compound with the formula KH2AsO4. Other salts are also called potassium arsenate, including K2HAsO4 and K3AsO4. Each of these species is derived from arsenic acid:
These species are closely related to the corresponding potassium phosphates. The anions H2AsO4−, HAsO42−, and AsO43− feature tetrahedral AsO4 with two, one, or no H atoms attached to the oxygen atom(s), respectively.
Although this and related arsenic salts have been prescribed for health purposes, such compounds are highly toxic.
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