Copper(II) arsenate

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Copper(II) arsenate
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Template:Longitem Cu3(AsO4)2
Molar mass 468.48 g/mol
Appearance blue or bluish green powder
Density 5.2 g/cm3
Melting point Template:Chembox CalcTemperatures
Template:Longitem 7.95Template:E[1]
Solubility soluble in ammonia, dilute acids

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Copper arsenate (Cu3(AsO4)2·4H2O, or Cu5H2(AsO4)4·2H2O), also called copper orthoarsenate, tricopper arsenate, cupric arsenate, or tricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous ammonium and dilute acids.

Uses

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.

Natural occurrences

Anhydrous copper arsenate, Cu3(AsO4)2, is found in nature as the mineral lammerite.[2] Copper arsenate tetrahydrate, Cu3(AsO4)2·4H2O, occurs naturally as the mineral rollandite.[3]

Related compounds

Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number 16102-92-4.[4] 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.[5]

See also

References

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External links

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