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Copper(II) arsenate

IUPAC name Copper(II) arsenate
Other names Copper arsenate
Identifiers
CAS number	7778-41-8 ^Y
PubChem	26065
ChemSpider	24279^Y
Jmol-3D images	Image 1
SMILES [Cu+2].[Cu+2].[Cu+2].[O-][As]([O-])(=O)[O-].[O-][As]([O-])([O-])=O
InChI InChI=1S/2AsH3O4.3Cu/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6^Y Key: RKYSWCFUYJGIQA-UHFFFAOYSA-H^Y InChI=1/2AsH3O4.3Cu/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RKYSWCFUYJGIQA-CYFPFDDLAM
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
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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 [7778-41-8] or [10103-61-4].

1 Uses
2 Natural occurrences
3 Related compounds
4 See also
5 External links
6 References

Uses [edit]

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 [edit]

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]

Related compounds [edit]

Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO₄) is a basic variant with CAS number [16102-92-4]. 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.[1]

External links [edit]

Wikimedia Commons has media related to: Copper(II) arsenate

National Pollutant Inventory - Copper and compounds fact sheet

References [edit]

^ Hawthorne, F. C. (1986). "Lammerite, Cu₃(AsO₄)₂, a modulated close-packed structure". American Mineralogist 71: 206–209.
^ Sarp, H.; Černý, R. (2000). "Rollandite, Cu₃(AsO₄)₂·4H₂O, a new mineral". Eur. J. Mineral. 12: 1045–1050. doi:10.1127/0935-1221/2000/0012-1045.

v t e Copper compounds

Cu(0,I)	Cu₅Si

Cu(I)	CuBr CuCN CuCl CuF CuH CuI Cu₂C₂ Cu₂Cr₂O₅ Cu₂O Cu₂S Cu₃(PO₄)₂ Cu₃P

Cu(II)	Cu(BF₄)₂ CuBr₂ CuC₂ Cu(CN)₂ CuCO₃ CuCl₂ CuF₂ Cu(NO₃)₂ CuN₆ CuO Cu(OH)₂ CuI₂ CuS CuSO₄ Cu₃(AsO₄)₂

Cu(III)	K₃CuF₆ Cu₂O₃

Cu(IV)	Cs₂CuF₆

v t e Pest control: insecticides

Carbamates	Aldicarb Bendiocarb Carbaryl Carbofuran Ethienocarb Fenobucarb Oxamyl Methomyl Propoxur

Inorganic compounds	Aluminium phosphide Boric acid Chromated copper arsenate Copper(II) arsenate Copper(I) cyanide Diatomaceous earth Lead hydrogen arsenate Paris Green Scheele's Green

Organochlorides	Aldrin Beta-HCH Carbon tetrachloride Chlordane Cyclodiene 1,2-DCB 1,4-DCB 1,1-DCE 1,2-DCE DDD DDE DDT Dicofol Dieldrin Endosulfan Endrin Heptachlor Kepone Lindane Methoxychlor Mirex Tetradifon Toxaphene

Organophosphorus	Acephate Azamethiphos Azinphos-methyl Bensulide Chlorethoxyfos Chlorfenvinphos Chlorpyrifos Chlorpyrifos-methyl Coumaphos Demeton-S-methyl Diazinon Dicrotophos Diisopropyl fluorophosphate Dimethoate Dioxathion Disulfoton Ethion Ethoprop Fenamiphos Fenitrothion Fenthion Fosthiazate Isoxathion Malathion Methamidophos Methidathion Mevinphos Monocrotophos Naled Omethoate Oxydemeton-methyl Parathion Parathion-methyl Phenthoate Phorate Phosalone Phosmet Phoxim Pirimiphos-methyl Quinalphos Temefos Tebupirimfos Terbufos Tetrachlorvinphos Tribufos Trichlorfon

Pyrethroids	Allethrins Bifenthrin Bioallethrin Cyfluthrin Cyhalothrin Cypermethrin Cyphenothrin Deltamethrin Empenthrin Esfenvalerate Etofenprox Fenvalerate Flumethrin Imiprothrin Metofluthrin Permethrin Phenothrin Prallethrin Pyrethrin (I, II; chrysanthemic acid) Pyrethrum Resmethrin Silafluofen Tefluthrin Tetramethrin Tralomethrin Transfluthrin

Neonicotinoids	Acetamiprid Clothianidin Dinotefuran Imidacloprid Nitenpyram Nithiazine Thiacloprid Thiamethoxam

Insect growth regulators	Benzoylureas Flufenoxuron Lufenuron Diflubenzuron Methoprene Hydroprene

Other chemicals	Amitraz Azadirachtin Chlordimeform Chlorfenapyr Cyromazine Fenazaquin Fenoxycarb Fipronil Hydramethylnon Indoxacarb Limonene Pyridaben Pyriprole Pyriproxyfen Ryanodine Sesamex Spinosad Sulfluramid Tebufenozide Tebufenpyrad Veracevine Xanthone

Metabolites	Oxon Malaoxon Paraoxon TCPy

Biopesticides	Bacillus thuringiensis Baculovirus Beauveria bassiana Beauveria brongniartii Metarhizium acridum Metarhizium anisopliae Nomuraea rileyi Lecanicillium lecanii Paecilomyces fumosoroseus Paenibacillus popilliae Purpureocillium lilacinum

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Copper(II) arsenate

Contents

Uses [edit]

Natural occurrences [edit]

Related compounds [edit]

See also [edit]

External links [edit]

References [edit]

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