| Copper(II) arsenate | |
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Copper(II) arsenate |
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Other names
Copper arsenate |
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| Identifiers | |
| CAS number | 7778-41-8 |
| PubChem | 26065 |
| ChemSpider | 24279 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | Cu3(AsO4)2 |
| Molar mass | 468.48 g/mol |
| Appearance | blue or bluish green powder |
| Density | 5.2 g/cm3 |
| Melting point |
1100 °C |
| Solubility in water | insoluble |
| Solubility | soluble in ammonia, dilute acids |
| Hazards | |
| EU Index | Not listed |
| (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 | |
Copper arsenate (Cu3(AsO4)2.4H2O, or Cu5H2(AsO4)4.2H2O), also called copper orthoarsenate or tricopper arsenate or tricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous ammonium and dilute acids. Its CAS number is [] or [].
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Copper arsenate is an insecticide used in agriculture. It is also used as a herbicide, fungicide, and a rodenticide. It is also used as a poison in slug baits.
Copper arsenate can also be a misnomer for copper arsenite, especially when meant as a pigment.
Anhydrous copper arsenate, Cu3(AsO4)2, is found in nature as the mineral lammerite.[1] Copper arsenate tetrahydrate, Cu3(AsO4)2.4H2O, occurs naturally as the mineral rollandite.[2]
Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number []. It is found naturally as the mineral olivenite. It is used as an insecticide, fungicide, and miticide. Its use is banned in Thailand since 2001.[1]
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