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HomeProduct name listGold hydroxide

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
Gold hydroxide Structural

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

In gold-plating solutions; for decorating porcelains.

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

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)
ghs
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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