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| ==See also== | ==See also== | ||
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| *] | *] | ||
| ⚫ | *] (copper acetoarsenite) | ||
| *] | *] | ||
| ⚫ | *] | ||
| ⚫ | *] (copper acetoarsenite) | ||
| *] (copper arsenite) | *] (copper arsenite) | ||
Latest revision as of 19:37, 19 January 2024
Not to be confused with Copper arsenite.-arsenate-constituent-ions-2D.png)
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| Names | |
|---|---|
| IUPAC name Copper(II) arsenate | |
| Other names Copper arsenate | |
| Identifiers | |
| CAS Number | |
| 3D model (JSmol) | |
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InChI
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SMILES
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| Properties | |
| Chemical formula | Cu3(AsO4)2 |
| Molar mass | 468.48 g/mol |
| Appearance | blue or bluish green powder |
| Density | 5.2 g/cm |
| Melting point | 1,100 °C (2,010 °F; 1,370 K) |
| Solubility in water | insoluble |
| Solubility product (Ksp) | 7.95×10 |
| Solubility | soluble in ammonia, dilute acids |
| Hazards | |
| NIOSH (US health exposure limits): | |
| PEL (Permissible) | TWA 1 mg/m (as Cu) |
| REL (Recommended) | TWA 1 mg/m (as Cu) |
| IDLH (Immediate danger) | TWA 100 mg/m (as Cu) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
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Infobox references
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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 7778-41-8 or 10103-61-4.
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. Copper arsenate tetrahydrate, Cu3(AsO4)2·4H2O, occurs naturally as the mineral rollandite.
Related compounds
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.
See also
- Calcium arsenate
- Chromated copper arsenate
- Lead arsenate
- Paris Green (copper acetoarsenite)
- Scheele's Green (copper arsenite)
References
- John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
- ^ NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
- 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.
- "Banned pesticides (Sorted by common name)". Archived from the original on 2005-11-22. Retrieved 2006-01-14.
External links
| Copper compounds | |
|---|---|
| Cu(0,I) | |
| Cu(I) | |
| Cu(I,II) | |
| Cu(II) | |
| Cu(III) | |
| Cu(IV) | |