Gold (III) hydroxide

Structural formula
General
Surname	Gold (III) hydroxide
other names	Gold hydroxide; Gold trihydroxide;
Molecular formula	Au (OH) 3
Brief description	brown solid
External identifiers / databases
EC number	215-120-0
ECHA InfoCard	100,013,746
PubChem	11536100
Wikidata	Q2623166
properties
Molar mass	247.99 g mol −1
Physical state	firmly
Melting point	> 160 ° C (decomposition)
solubility	practically insoluble in water; soluble in sodium cyanide; soluble in acids;
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Gold (III) hydroxide is an inorganic chemical compound of gold from the group of hydroxides .

Extraction and presentation

Gold (III) hydroxide can be obtained by reacting gold (III) chloride solutions with alkali hydroxides.

The compound can also be obtained by reacting gold (III) chloride with potassium carbonate in hot water.

{\ displaystyle {\ ce {2AuCl3 + 3K2CO3 + 6H2O -> 2Au (OH) 3 + 3H2O + 3CO2 + 6KCl}}}

properties

Gold (III) hydroxide is a brown solid that is practically insoluble in water. It decomposes quickly in sunlight, otherwise slowly with gold deposition.

use

Gold (III) hydroxide is used in medicine, in porcelain manufacture, for gilding and in daguerreotypes . It is also used to make gold catalysts.

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet Gold (III) hydroxide, from Sigma-Aldrich , accessed on March 12, 2018 ( PDF ).
↑ ^a ^b ^c ^d Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 191 ( limited preview in Google Book search).
↑ ^a ^b ^c data sheet gold (III) hydroxide, Au 79% min from AlfaAesar, accessed on March 12, 2018 ( PDF )(JavaScript required) .
↑ Daisuke Kawamoto, Hiroaki Ando, Hironori Ohashi, Yasuhiro Kobayashi, Tetsuo Honma, Tamao Ishida, Makoto Tokunaga, Yoshihiro Okaue, Satoshi Utsunomiya, Takushi Yokoyama: Structure of a Gold (III) Hydroxide and Determination of Its Solubility. In: Bulletin of the Chemical Society of Japan. 89, 2016, p. 1385, doi : 10.1246 / bcsj.20160228 .
^ William M. Haynes: CRC Handbook of Chemistry and Physics, 97th Edition . CRC Press, 2016, ISBN 978-1-4987-5429-3 , pp. 97 ( limited preview in Google Book search).
↑ Mironov, Igor. (2005). Properties of Gold (III) Hydroxide and Aquahydroxogold (III) Complexes in Aqueous Solution . Russian Journal of Inorganic Chemistry. 50.1115.
↑ Boyle: Gold History and Genesis of Deposits . Springer Science & Business Media, 2012, ISBN 978-1-4613-1969-6 , pp. 139 ( limited preview in Google Book search).

[Sigma-1] ↑ ^a ^b ^c ^d ^e data sheet Gold (III) hydroxide, from Sigma-Aldrich , accessed on March 12, 2018 ( PDF ).

[Dale_L._Perry-2] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 191 ( limited preview in Google Book search).

[Alfa-3] ta sheet gold (III) hydroxide, Au 79% min from AlfaAesar, accessed on March 12, 2018 ( PDF )(JavaScript required) .

[DOI10.1246/bcsj.20160228-4] Daisuke Kawamoto, Hiroaki Ando, Hironori Ohashi, Yasuhiro Kobayashi, Tetsuo Honma, Tamao Ishida, Makoto Tokunaga, Yoshihiro Okaue, Satoshi Utsunomiya, Takushi Yokoyama: Structure of a Gold (III) Hydroxide and Determination of Its Solubility. In: Bulletin of the Chemical Society of Japan. 89, 2016, p. 1385, doi : 10.1246 / bcsj.20160228 .

[William_M._Haynes-5] William M. Haynes: CRC Handbook of Chemistry and Physics, 97th Edition . CRC Press, 2016, ISBN 978-1-4987-5429-3 , pp. 97 ( limited preview in Google Book search).

[6] Mironov, Igor. (2005). Properties of Gold (III) Hydroxide and Aquahydroxogold (III) Complexes in Aqueous Solution . Russian Journal of Inorganic Chemistry. 50.1115.

[Boyle-7] Boyle: Gold History and Genesis of Deposits . Springer Science & Business Media, 2012, ISBN 978-1-4613-1969-6 , pp. 139 ( limited preview in Google Book search).