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| Gold hydroxide Basic information |
| Gold hydroxide Chemical Properties |
| Melting point | decomposes at ~100℃ [LID94] | | form | Powder | | Water Solubility | Insoluble in water. | | Sensitive | Light Sensitive | | Merck | 14,4523 | | Solubility Product Constant (Ksp) | pKsp: 45.26 | | Stability: | Stability May decompose upon exposure to light. Incompatible with strong oxidizing agents. | | CAS DataBase Reference | 1303-52-2(CAS DataBase Reference) | | EPA Substance Registry System | Gold hydroxide (Au(OH)3) (1303-52-2) |
| Gold hydroxide Usage And Synthesis |
| Chemical Properties | solid | | Physical properties | Brown powder; decomposes at 100°C; insoluble in water; soluble in acid. | | Uses | In gold-plating solutions; for decorating porcelains. | | Uses | Synthesis of gold hydroxide complexes with N-heterocyclic carbene has been reported. A variety of perfluoroaryls, N-heterocyclic and alkynyl compounds may be synthesized by reacting gold(III) hydroxide with C–H and N–H compounds and arylboronic acids. Potassium aurate may be prepared by heating auric hydroxide with conc. KOH. 3 | | Production Methods | Gold(III) hydroxide is precipitated by mixing aqueous solutions of potassium auric chloride and sodium carbonate:2KAuCl4 + 3Na2CO3 + 3H2O → 2Au(OH)3 + 6NaCl + 2KCl + 3CO2 The product usually contains about three molecules of water of crystallization. It may alternatively be prepared by adding caustic soda solution to sodium auric cyanide: NaAu(CN)4 + 3NaOH → Au(OH)3 + 4NaCN. |
| Gold hydroxide Preparation Products And Raw materials |
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