Copper (II) arsenite

Structural formula
No drawing available
General
Surname	Copper (II) arsenite
other names	Copper arsenite (ambiguous) Copper-o-arsenite Scheeles green Copper orthoarsenite
Molecular formula	CuHAsO 3
Brief description	yellow-green solid
External identifiers / databases
CAS number 10290-12-7 EC number 233-644-8 ECHA InfoCard 100.030.573 PubChem 25130 Wikidata Q417286
properties
Molar mass	187.46 g mol −1
Physical state	firmly
Melting point	Decomposes on heating
solubility	almost insoluble in water
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 331-301-410 P: ?
MAK	no MAK, as carcinogenic
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Copper (II) arsenite is a mixture of copper salts of arsenic acid with the approximate chemical formula CuHAsO ₃ .

The mixture of normal and basic copper arsenites was first produced by Carl Wilhelm Scheele in 1775 from copper sulfate , arsenic and sodium carbonate or potassium carbonate . The discovery was published in 1778, but its manufacture was kept a secret. This led to different variants with the approximate composition CuHAsO ₃ or Cu ₃ (AsO ₃ ) ₂ · 3H ₂ O, of which an "improved" one was patented by Parker in England in 1812 as a Green patent. The substance was named Scheeles Green after its discoverer, but also as mineral green, Parisian green, Swedish green, Cuprum arsenicosum. This is a yellow-green solid that is practically insoluble in water and ethanol , but soluble in dilute acids and an aqueous ammonia solution . In addition to Schweinfurt green (copper (II) acetate arsenite), the substance was used as a green color pigment for a long time.

Individual evidence

1. ^ ^{A b c} Gmelin's Handbook of Inorganic Chemistry: Copper [B], system number 60, Verlag Chemie GmbH, Berlin
2. ↑ ^{a b c d} Entry on copper (II) arsenite in the GESTIS substance database of the IFA , accessed on February 16, 2017(JavaScript required) .
3. ↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry arsenic compounds, with the exception of those named in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
4. ↑ files.wordpress.com: A Tribute to the Memory of Carl Wilhelm Scheele (1742–1786) , by Professor Gunnar Svedberg, accessed on March 25, 2016
5. ↑ ^{a b} Entry on copper arsenates. In: Römpp Online . Georg Thieme Verlag, accessed on March 19, 2016.
6. ^ Hermann Hager, NA Frerichs, NA Arends, NA Zörnig, NA Rimbach, NA Mannheim, NA Hartwig, NA Bachem, NA Hilgers: Hager's Handbook of Pharmaceutical Practice For Pharmacists, Doctors, Druggists and Medical Officials . Springer-Verlag, 2013, ISBN 978-3-662-02106-4 , pp. 561 ( limited preview in Google Book search).
7. ↑ egranth.ac.in: Chemistry of INSECTICIDES, FUNGICIDES AND HERBICIDES BY DONALD EH FREAR ( Memento of March 26, 2016 in the Internet Archive ), Second Edition, September 1948, accessed on March 26, 2016
8. ↑ Ya-jie Zheng, Fa-xin Xiao, Yong Wang, Chun-hua Li, Wei Xu, Hong-sheng Jian, Yu-tian Ma: Industrial experiment of copper electrolyte purification by copper arsenite. In: Journal of Central South University of Technology. 15, 2008, p. 204, doi : 10.1007 / s11771-008-0039-2 .
9. ^ Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall: Pigment Compendium: A Dictionary of Historical Pigments . Routledge, 2007, ISBN 978-1-136-37386-2 , pp. 122 ( limited preview in Google Book search).
10. ^ PH List and L. Hörhammer in association with HJ Roth and W. Schmid: Hager's Handbook of Pharmaceutical Practice. Volume 4: Chemicals and Drugs (CI-G) . Springer-Verlag, 1973, ISBN 978-3-642-80620-9 , pp. 373 ( limited preview in Google Book search).