Copper(II) arsenate: Difference between revisions
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{{distinguish|Copper arsenite}} |
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| CASNo = 7778-41-8 |
| CASNo = 7778-41-8 |
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| CASNo_Ref = {{cascite|correct|??}} |
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| UNII_Ref = {{fdacite|correct|FDA}} |
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| UNII = EV78GZO3YS |
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| PubChem = 26065 |
| PubChem = 26065 |
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| Solubility = insoluble |
| Solubility = insoluble |
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| SolubleOther = soluble in [[ammonia]], dilute [[acid]]s |
| SolubleOther = soluble in [[ammonia]], dilute [[acid]]s |
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| SolubilityProduct = 7.95{{e|−36}}<ref name="crc">{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1138561632 |pages=5–188|edition=99 |language=English}}</ref> |
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|Section7={{Chembox Hazards |
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'''Copper arsenate''' (Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub> |
'''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== |
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==Natural occurrences== |
==Natural occurrences== |
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Anhydrous copper arsenate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, is found in nature as the mineral '''lammerite'''.<ref>{{ cite journal | first1 = F. C. | last1 = Hawthorne | journal = [[American Mineralogist]] | volume = 71 | year = 1986 | pages = 206–209 | title = Lammerite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, a modulated close-packed structure | url = http://www.minsocam.org/ammin/AM71/AM71_206.pdf }}</ref> Copper arsenate tetrahydrate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub> |
Anhydrous copper arsenate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, is found in nature as the mineral '''lammerite'''.<ref>{{ cite journal | first1 = F. C. | last1 = Hawthorne | journal = [[American Mineralogist]] | volume = 71 | year = 1986 | pages = 206–209 | title = Lammerite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, a modulated close-packed structure | url = http://www.minsocam.org/ammin/AM71/AM71_206.pdf }}</ref> Copper arsenate tetrahydrate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, occurs naturally as the mineral '''rollandite'''.<ref>{{ cite journal | title = Rollandite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, a new mineral | first1 = H. | last1 = Sarp | first2 = R. | last2 = Černý | journal = Eur. J. Mineral. | volume = 12 | year = 2000 | pages = 1045–1050 | doi = 10.1127/0935-1221/2000/0012-1045 | url = https://archive-ouverte.unige.ch/unige:86439 }}</ref> |
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==Related compounds== |
==Related compounds== |
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'''Copper arsenate hydroxide''' or '''basic copper arsenate''' (Cu(OH)AsO<sub>4</sub>) is a basic variant with CAS number {{CASREF|CAS=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.<ref>{{cite web |url=http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm |title= |
'''Copper arsenate hydroxide''' or '''basic copper arsenate''' (Cu(OH)AsO<sub>4</sub>) is a basic variant with CAS number {{CASREF|CAS=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.<ref>{{cite web |url=http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm |title=Banned pesticides (Sorted by common name) |access-date=2006-01-14 |url-status=dead |archive-url=https://web.archive.org/web/20051122181117/http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm |archive-date=2005-11-22 }}</ref> |
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==See also== |
==See also== |
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⚫ | |||
*[[Calcium arsenate]] |
*[[Calcium arsenate]] |
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⚫ | |||
*[[Chromated copper arsenate]] |
*[[Chromated copper arsenate]] |
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⚫ | |||
⚫ | |||
*[[Scheele's Green]] (copper arsenite) |
*[[Scheele's Green]] (copper arsenite) |
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[[Category:Arsenates]] |
[[Category:Arsenates]] |
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[[Category:Copper compounds]] |
[[Category:Copper(II) compounds]] |
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[[Category:Inorganic insecticides]] |
[[Category:Inorganic insecticides]] |
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[[Category:Arsenical herbicides]] |
[[Category:Arsenical herbicides]] |
Latest revision as of 19:37, 19 January 2024
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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UNII | |
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 | 1,100 °C (2,010 °F; 1,370 K) |
insoluble | |
Solubility product (Ksp)
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7.95×10−36[1] |
Solubility | soluble in ammonia, dilute acids |
Hazards | |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 1 mg/m3 (as Cu)[2] |
REL (Recommended)
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TWA 1 mg/m3 (as Cu)[2] |
IDLH (Immediate danger)
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TWA 100 mg/m3 (as Cu)[2] |
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
[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.[3] Copper arsenate tetrahydrate, Cu3(AsO4)2·4H2O, occurs naturally as the mineral rollandite.[4]
Related compounds
[edit]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.[5]
. It is found naturally as the mineralSee also
[edit]- Calcium arsenate
- Chromated copper arsenate
- Lead arsenate
- Paris Green (copper acetoarsenite)
- Scheele's Green (copper arsenite)
References
[edit]- ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
- ^ a b c 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.