GOLD(I) CYANIDE Chemical Properties

Melting point:

~50°C

Density 

7,12 g/cm³

solubility 

insoluble in H2O, ethanol, ethyl ether,dilute acid solutions

form 

Powder

Specific Gravity

7.14

color 

Yellow

Water Solubility 

Slightly soluble in water.

Sensitive 

Moisture Sensitive

Merck 

14,4516

Exposure limits

NIOSH: IDLH 25 mg/m3

CAS DataBase Reference

506-65-0(CAS DataBase Reference)

EPA Substance Registry System

Gold cyanide (Au(CN)) (506-65-0)

Safety Information

Hazard Codes 

T+,N

Risk Statements 

26/27/28-32-50/53

Safety Statements 

7-28-29-60-61-45

RIDADR 

1588

WGK Germany 

3

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

28433000

MSDS

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GOLD(I) CYANIDE Usage And Synthesis

Chemical Properties

yellow powder(s); hexagonal; odorless; iridescent in sunlight; slowly decomposes in presence of moisture [MER06]

Physical properties

Yellow hexagonal crystals; odorless; density 7.14 g/cm³; decomposes slowly in the presence of moisture or decomposes on heating; insoluble in water, alcohol and ether; also insoluble in dilute acids; soluble in aqueous solutions of potassium-, or sodium cyanide, ammonia, and aqua regia.

Uses

Electrolyte in the electroplating industry

Preparation

Gold(I) cyanide may be prepared by boiling sodium aurus cyanide, Na[Au(CN)₂] with hydrochloric acid:Na[Au(CN)2] + HCl AuCN + HCN + NaCl
The complex cyanide, Na[Au(CN)₂] is made by dissolving gold in a dilute solution of sodium cyanide in the presence of air; or by dissolution of a gold anode in a solution of sodium cyanide during electrolysis. The solution is evaporated to separate the complex, Na[Au(CN)₂], which is purified by recrystallization from water. Potassium cyanide may be used instead of sodium cyanide to prepare gold(I) cyanide.

Hazard

Toxic material.

Purification Methods

The lemon yellow powder is sparingly soluble in H2O and EtOH but soluble in aqueous NH3. It is obtained by heating H[Au(CN)2] at 110o. Wash it well with H2O and EtOH and dry it at 110o. It has an IR band at max 2239 cm -1 typical for C stretching vibration. [Glemser & Sauer Handbook of Preparative Inorg anic Chemistry (Ed. Brauer) Academic Press Vol II p 1064 1965.] CARE: may evolve HCN.

GOLD(I) CYANIDE(506-65-0)Related Product Information

• ZINC CYANIDE
• Silver cyanide
• Barium molybdate
• GOLD
• Gold(III) cyanide trihydrate
• POTASSIUM GOLD CYANIDE,GOLD POTASSIUM CYANIDE,POTASSIUM GOLD(+1)CYANIDE,POTASSIUM GOLD(I) CYANIDE
• GOLD(I) CYANIDE
• Potassium gold(III) cyanide
• SODIUM GOLD CYANIDE,GOLD SODIUM CYANIDE
• sodium tetrakis(cyano-C)aurate
• Potassium dicyanoaurate