-arsenate-constituent-ions-2D.png) | |
| Names | |
|---|---|
| IUPAC name Copper(II) arsenate | |
| Other names Copper arsenate | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| UNII | |
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| Properties | |
| Cu3(AsO4)2 | |
| Molar mass | 468.48 g/mol |
| Appearance | blue or bluish green powder |
| Density | 5.2 g/cm3 |
| Melting point | 1,100 °C (2,010 °F; 1,370 K) |
| insoluble | |
Solubility product (Ksp) | 7.95×10−36[1] |
| Solubility | soluble inammonia, diluteacids |
| Hazards | |
| NIOSH (US health exposure limits): | |
PEL (Permissible) | TWA 1 mg/m3 (as Cu)[2] |
REL (Recommended) | TWA 1 mg/m3 (as Cu)[2] |
IDLH (Immediate danger) | TWA 100 mg/m3 (as Cu)[2] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Copper arsenate (Cu3(AsO4)2·4H2O, or Cu5H2(AsO4)4·2H2O), also calledcopper orthoarsenate,tricopper arsenate,cupric arsenate, ortricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueousammonium and dilute acids.
Copper arsenate is aninsecticide used in agriculture. It is also used as aherbicide,fungicide, and arodenticide. It is also used as a poison inslug baits.
Copper arsenate can also be a misnomer forcopper arsenite, especially when meant as apigment.
Anhydrous copper arsenate, Cu3(AsO4)2, is found in nature as the minerallammerite.[3] Copper arsenate tetrahydrate, Cu3(AsO4)2·4H2O, occurs naturally as the mineralrollandite.[4]
Copper arsenate hydroxide orbasic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number 16102-92-4.[5] It is found naturally as the mineralolivenite. It is used as an insecticide, fungicide, andmiticide. Its use is banned in Thailand since 2001.[6]
