Nickel (II) cyanide

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Structural formula
Ni2 + ion   2Cyanide ion
General
Surname Nickel (II) cyanide
other names

Nickel cyanide

Molecular formula Ni (CN) 2
Brief description

light green powder (tetrahydrate)

External identifiers / databases
CAS number
  • 557-19-7
  • 13477-95-7 (tetrahydrate)
EC number 209-160-8
ECHA InfoCard 100.008.329
PubChem 11184
Wikidata Q1985587
properties
Molar mass 110.7 g mol −1
Physical state

firmly

Melting point

200 ° C (tetrahydrate, dehydration)

solubility

almost insoluble in water

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 317-334-350-372-410
EUH: 032
P: 201-285-302 + 352
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel (II) cyanide is a toxic chemical compound of the metal nickel and belongs to the group of cyanides ( salts of hydrogen cyanide ).

Extraction and presentation

Precipitation of nickel (II) cyanide from a nickel (II) sulphate solution with potassium cyanide

Nickel (II) cyanide is formed as a greenish-white precipitate when potassium cyanide is added to nickel salt solutions (e.g. nickel sulfate ).


If there is an excess of potassium cyanide, the complex salt potassium tetracyanonickelate (II) K 2 [Ni (CN) 4 ] (CAS no .: 14220-17-8) is formed.

properties

Nickel (II) cyanide, when hydrated, is in the form of flake or greenish powder, in its amorphous form it is a yellow powder.

use

Nickel (II) cyanide is used in metallurgy and electroplating (for nickel plating).

safety instructions

Like many nickel compounds, nickel cyanide is classified as toxic and carcinogenic.

Individual evidence

  1. ↑ a b c d e f data sheet Nickel (II) cyanide tetrahydrate from AlfaAesar, accessed on December 7, 2019 ( PDF )(JavaScript required) .
  2. ↑ Entry on nickel cyanide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on November 22, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
  3. ^ Holleman-Wiberg: Textbook of Inorganic Chemistry. verb. u. strong adult Edition. Walter de Gruyter, Berlin 1985, ISBN 3-11-007511-3 , p. 1155.