| Gold(III) hydroxide[1] | |
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Gold(3+) trihydroxide[2] |
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Other names
λ3-Auranetriol Auric acid |
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| Identifiers | |
| CAS number | 1303-52-2 |
| PubChem | 11536100 |
| ChemSpider | 21170948 |
| EC number | 215-120-0 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | AuH3O3 |
| Molar mass | 247.9886 g mol-1 |
| Exact mass | 247.974770571 g mol-1 |
| Appearance | Vivid, dark yellow crystals |
| Structure | |
| Molecular shape | Trigonal dihedral at Au |
| Hazards | |
| MSDS | Oxford |
| EU classification | Xi |
| R-phrases | R36/37/38 |
| S-phrases | S26, S37/39 |
| Related compounds | |
| Related compounds | Gold(III) chloride |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Gold(III) hydroxide, gold trihydroxide, or gold hydroxide is an inorganic compound, a hydroxide of gold, with formula Au(OH)3. It is also called auric acid with formula H3AuO3. It is easily dehydrated above 140 °C to gold(III) oxide. Salts of auric acid are termed aurates.
Gold hydroxide is used in medicine, porcelain making, gold plating, and daguerrotypes. Gold hydroxide deposited on suitable carriers can be used for preparation of gold catalysts.[3]
Gold hydroxide is a product of electrochemical corrosion of gold metalization subjected to moisture and positive electric potential; it is one of the corrosion failure modes of microelectronics. Voluminous gold hydroxide is produced from gold metalization; after the layer grows thick it may spall, and the conductive particles may cause short circuits or leakage paths. Decrease of thickness of gold layer may also lead to increase of its electrical resistance.[4]
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