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Chemical compound From Wikipedia, the free encyclopedia
Sodium tetrachloroaurate is an inorganic compound with the chemical formula NaAuCl4. It is composed of the ions Na+ and AuCl4−. It exists in the anhydrous and dihydrate states. At room temperature, it exists as a golden-orange solid. The anhydrous and dihydrate forms are available commercially.[1]
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Names | |
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IUPAC name
Sodium tetrachloroaurate (III) | |
Other names
Sodium gold chloride, yellow gold chloride | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.035.659 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
NaAuCl4 | |
Molar mass | 361.756 g/mol |
Appearance | Orange powder |
Density | 3.81 g cm−3[2] |
anhydrous: 139g/100ml (10°C) 151g/100ml (20°C) 900g/100ml (60°C)[3] | |
Solubility | Sparingly soluble in diethyl ether,[4] soluble in alcohol, ether[3] |
Hazards[5] | |
GHS labelling: | |
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Danger | |
H315, H319, H335 | |
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P330, P332+P313, P333+P313, P337+P313, P363, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The conventional method of preparation of sodium tetrachloroaurate involves the addition of tetrachloroauric acid solution to sodium chloride or sodium carbonate to form a mixture. The mixture is stirred at 100 °C, and then subjected to evaporation, cooling, crystallization, and drying to obtain the orange crystals of sodium tetrachloroaurate.[4][6]
However, more efficient preparation methods have been discovered recently. These are the addition of gold with sodium oxy-halogen salts and hydrochloric acid.[6]
It is used in a wide range of applications. For example, it is used as a catalyst for the hydrochlorination of acetylene, or the oxidation of sulfides.[4]
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