Gold(III) hydroxide

Gold(III) hydroxide^[1]

Names
Systematic IUPAC name Gold(3+) trihydroxide[2]
Other names λ3-Auranetriol Auric acid Gold hydroxide Gold trihydroxide
Identifiers
CAS Registry Number	1303-52-2 Y
ChemSpider	21170948 N
EC number	215-120-0
InChI InChI=1S/Au.3H2O/h;3*1H2/q+3;;;/p-3 N Key: WDZVNNYQBQRJRX-UHFFFAOYSA-K N
Jmol-3D images	Image Image
PubChem	11536100
SMILES O[Au](O)O [OH-].[OH-].[OH-].[Au+3]
Properties
Chemical formula	AuH 3O 3
Molar mass	247.9886 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 Copper(II) hydroxide Gold(III) oxide
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 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. The decreased thickness of the gold layer may also lead to an increase in its electrical resistance, which can also lead to electrical failure.^[4]

References