Cobalt(II) iodide

Cobalt(II) iodide
Names
	IUPAC name Cobalt(II) iodide
	Other names cobaltous iodide, cobalt diiodide
Identifiers
CAS Number	15238-00-3 (HCl) ; 52595-03-6 (hexahydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	76542 ;
ECHA InfoCard	100.035.697
EC Number	239-283-2;
PubChem CID	419951;
UNII	RTJ1W9DF34 ;
CompTox Dashboard (EPA)	DTXSID301014304 DTXSID00329389, DTXSID301014304 ;
	InChI InChI=1S/Co.2HI/h;21H/q+2;;/p-2 Key: AVWLPUQJODERGA-UHFFFAOYSA-L ; InChI=1/Co.2HI/h;21H/q+2;;/p-2 Key: AVWLPUQJODERGA-NUQVWONBAD;
	SMILES [Co+2].[I-].[I-];
Properties
Chemical formula	CoI2
Molar mass	312.7421 g/mol (anhydrous) ; 420.83 g/mol (hexahydrate)
Appearance	α-form: black hexagonal crystal; β-form: yellow powder
Density	α-form: 5.584 g/cm3; β-form: 5.45 g/cm3 ; hexahydrate: 2.79 g/cm3
Melting point	α-form: 515-520 °C under vacuum; β-form: converts to α-form at 400 °C
Boiling point	570 °C (1,058 °F; 843 K)
Solubility in water	67.0 g/100 mL
Magnetic susceptibility (χ)	+10,760·10−6 cm3/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H315, H319, H332, H335
NFPA 704 (fire diamond)	3 0 1
Related compounds
Other anions	Cobalt(II) fluoride; Cobalt(II) chloride; Cobalt(II) bromide
Other cations	Nickel(II) iodide; Copper(I) 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

Cobalt(II) iodide or cobaltous iodide are the inorganic compounds with the formula Co I₂ and the hexahydrate CoI₂(H₂O)₆. These salts are the principal iodides of cobalt.