Gold hydroxide
- CAS NO.：1303-52-2
- Empirical Formula: AuH3O3
- Molecular Weight: 247.99
- MDL number: MFCD00046173
- EINECS: 215-120-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-08-17 21:30:02
What is Gold hydroxide?
Chemical properties
solid
Physical properties
Brown powder; decomposes at 100°C; insoluble in water; soluble in acid.
The Uses of Gold hydroxide
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
The Uses of Gold hydroxide
In gold-plating solutions; for decorating porcelains.
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.
Properties of Gold hydroxide
| Melting point: | decomposes at ~100℃ [LID94] |
| solubility | insoluble in H2O; soluble in acid solutions |
| form | Powder |
| color | brown |
| 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) |
Safety information for Gold hydroxide
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Gold hydroxide
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