Nickel(II) iodide

Nickel(II) iodide
	Hexahydrate
Names
	IUPAC name Nickel(II) iodide
	Other names Nickelous iodide
Identifiers
CAS Number	13462-90-3 ;
3D model (JSmol)	Interactive image; hexahydrate: Interactive image;
ChemSpider	24252; hexahydrate: 32816205;
ECHA InfoCard	100.033.319
EC Number	236-666-6;
PubChem CID	26038; hexahydrate: 138962054;
UNII	AQ9OJ30HDD ;
CompTox Dashboard (EPA)	DTXSID1065479 ;
	InChI Key: BFSQJYRFLQUZKX-UHFFFAOYSA-L; InChI=1S/2HI.Ni/h21H;/q;;+2/p-2; hexahydrate: InChI=1S/2HI.Ni.6H2O/h21H;;6*1H2/q;;+2;;;;;;/p-2 Key: IBSOYFJDSVROOT-UHFFFAOYSA-L;
	SMILES [Ni](I)I; hexahydrate: I[Ni]I.O.O.O.O.O.O;
Properties
Chemical formula	I2Ni
Molar mass	312.5023 g·mol−1
Appearance	iron-black solid (anhydrous) ; bluish-green solid (hexahydrate)
Density	5.384 g/cm3
Melting point	780 °C (1,440 °F; 1,050 K) (anhydrous) ; 43 °C (hexahydrate, loses water)
Solubility in water	124.2 g/100 mL (0 °C) ; 188.2 g/100 mL (100 °C)
Solubility	alcohols
Magnetic susceptibility (χ)	+3875.0·10−6 cm3/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H317, H334, H341, H350i, H360D, H372, H410
Precautionary statements	P203, P233, P260, P264, P270, P271, P272, P273, P280, P284, P302+P352, P304+P340, P318, P319, P321, P333+P317, P342+P316, P362+P364, P391, P403, P405, P501 Preview warning: Omit Rules: keep P260, omit P261
Related compounds
Other anions	Nickel(II) chloride; Nickel(II) bromide; Nickel(II) fluoride;
Other cations	Cobalt iodide; Copper iodide;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Nickel(II) iodide is an inorganic compound with the formula NiI₂. This paramagnetic black solid dissolves readily in water to give bluish-green solutions, from which crystallizes the aquo complex [Ni(H₂O)₆]I₂ (image above). This bluish-green colour is typical of hydrated nickel(II) compounds. Nickel iodides find some applications in homogeneous catalysis.