Gold hydroxide

Details:

Product Name: Gold hydroxide
Synonyms: goldhydroxide(au(oh)3);Gold trihydroxide;GOLD(III) HYDROXIDE;GOLD HYDROXIDE;Gold(III) hydroxide, 99.9%;GOLD (III) HYDROXIDE, 99.9% (CL < 100PPM);Gold(III) hydroxide, Au 79% min;gold trihydrate
CAS: 1303-52-2
MF: AuH3O3
MW: 247.99
EINECS: 215-120-0
Product Categories: Gold Salts;Metal and Ceramic Science;Salts
Mol File: 1303-52-2.mol
Gold hydroxide Structure
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)
Safety Information
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-37/39
WGK Germany  3
TSCA  Yes

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.
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.