Title: Gold Monocyanide

CAS Registry Number: 506-65-0

Additional Names: Aurous cyanide; gold cyanide

Molecular Formula: CAuN

Molecular Weight: 222.98

Percent Composition: C 5.39%, Au 88.33%, N 6.28%

Line Formula: AuCN

Literature References: May be prepd by decompn of Na[Au(CN)2] with HCl: Wogrinz, Metalloberflaeche 8, B162 (1954).

Properties: Yellow, odorless powder; iridescent in sunlight; slowly dec in presence of moisture. When warmed with HCl, HCN is evolved. When ignited, dec into metal Au and CN. d420 7.14. Hexagonal when cryst. Practically insol in water, alcohol, ether, dil acids; sol in ammonia, soln of NaCN; dissolved by aqua regia. On warming with concd H2SO4 half of the gold separates as metal.

Density: d420 7.14

CAUTION: May liberate HCN.