Mercury (II) cyanide

Structural formula
General
Surname	Mercury (II) cyanide
other names	Mercury cyanide
Molecular formula	Hg (CN) 2
Brief description	colorless and odorless solid
External identifiers / databases
EC number	209-741-6
ECHA InfoCard	100.008.857
PubChem	11591
Wikidata	Q257127
properties
Molar mass	252.62 g mol −1
Physical state	firmly
density	4.0 g cm −3
Melting point	320 ° C (decomposes into mercury , hydrogen cyanide and dicyan )
solubility	soluble in water
safety instructions
H and P phrases	H: 300 + 310 + 330-373-410
	EUH: 032
	P: 260-280-301 + 310 + 330-302 + 352-310-304 + 340 + 310-403 + 233
MAK	0.1 mg m −3
Toxicological data	26 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Mercury (II) cyanide is a chemical compound with the molecular formula Hg (CN) ₂ .

presentation

Mercury (II) cyanide is formed when mercury (II) oxide is dissolved in hydrocyanic acid , when mercury oxide is boiled with Berlin blue or when sulfuric acid mercury oxide with yellow blood liquor salt is boiled .

classification

UN number : 1636

properties

Mercury (II) cyanide forms colorless and odorless crystals that dissolve in water and some polar organic solvents . The extremely low dissociation into mercury (II) and cyanide ions in aqueous solution is interesting . The compound is very toxic .

safety instructions

Mercury cyanide is highly toxic. The compound is much more dangerous than other cyanides in terms of Hg ²⁺ ions. It simultaneously loads the organism with mercury ions and cyanide ions. It must be kept away from any acids in tightly sealed containers, otherwise the highly toxic hydrogen cyanide is formed.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Entry on mercury cyanide in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .

↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entries on organic compounds of mercury with the exception of those specified elsewhere in this Annex and salts of hydrogen cyanide with the exception of complex cyanides such as ferrocyanides, ferricyanides and mercuric oxycyanide and those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on March 18, 2017. Manufacturers or distributors can expand the harmonized classification and labeling .

↑ Entry on mercury (II) cyanide in the ChemIDplus database of the United States National Library of Medicine (NLM)

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on mercury cyanide in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .