Copper(II) arsenate: Difference between revisions
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'''Copper arsenate''' (Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O, or Cu<sub>5</sub>H<sub>2</sub>(AsO<sub>4</sub>)<sub>4</sub>.2H<sub>2</sub>O), also called '''copper orthoarsenate''' |
'''Copper arsenate''' (Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O, or Cu<sub>5</sub>H<sub>2</sub>(AsO<sub>4</sub>)<sub>4</sub>.2H<sub>2</sub>O), 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. Its [[CAS number]] is {{CASREF|CAS=7778-41-8}} or {{CASREF|CAS=10103-61-4}}. |
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==Uses== |
==Uses== |
Revision as of 00:32, 6 January 2014
Names | |
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IUPAC name
Copper(II) arsenate
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Other names
Copper arsenate
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
PubChem CID
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CompTox Dashboard (EPA)
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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 | 1100 °C |
insoluble | |
Solubility | soluble in ammonia, dilute acids |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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. Its CAS number is or .
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.[1] Copper arsenate tetrahydrate, Cu3(AsO4)2.4H2O, occurs naturally as the mineral rollandite.[2]
Related compounds
Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number olivenite. It is used as an insecticide, fungicide, and miticide. Its use is banned in Thailand since 2001.[1]
. It is found naturally as the mineralSee also
- Lead arsenate
- Calcium arsenate
- Paris Green (copper acetoarsenite)
- Chromated copper arsenate
- Scheele's Green (copper arsenite)
External links
References
- ^ Hawthorne, F. C. (1986). "Lammerite, Cu3(AsO4)2, a modulated close-packed structure" (PDF). 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.