Calcium iodide

Calcium iodide
Names
	IUPAC name calcium iodide
Identifiers
CAS Number	10102-68-8 ; 13640-62-5 (tetrahydrate) ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	59629 ;
ECHA InfoCard	100.030.238
EC Number	233-276-8;
PubChem CID	66244;
RTECS number	EV1300000;
UNII	8EKI9QEE2H ;
CompTox Dashboard (EPA)	DTXSID2064945 ;
	InChI InChI=1S/Ca.2HI/h;21H/q+2;;/p-2 Key: UNMYWSMUMWPJLR-UHFFFAOYSA-L ; InChI=1/Ca.2HI/h;21H/q+2;;/p-2 Key: UNMYWSMUMWPJLR-NUQVWONBAC;
	SMILES I[Ca]I; [Ca+2].[I-].[I-];
Properties
Chemical formula	CaI2
Molar mass	293.887 g/mol (anhydrous) ; 365.95 g/mol (tetrahydrate)
Appearance	white solid
Density	3.956 g/cm3 (anhydrous)
Melting point	779 °C (1,434 °F; 1,052 K) (anhydrous)
Boiling point	1,100 °C (2,010 °F; 1,370 K)
Solubility in water	64.6 g/100 mL (0 °C) ; 66 g/100 mL (20 °C) ; 81 g/100 mL (100 °C)
Solubility	soluble in acetone and alcohols
Magnetic susceptibility (χ)	-109.0·10−6 cm3/mol
Structure
Crystal structure	Rhombohedral, hP3
Space group	P-3m1, No. 164
Coordination geometry	octahedral
Hazards
NFPA 704 (fire diamond)	2 0 1
Related compounds
Other anions	calcium fluoride; calcium chloride; calcium bromide
Other cations	beryllium iodide; magnesium iodide; strontium iodide; barium 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

Calcium iodide (chemical formula CaI₂) is the ionic compound of calcium and iodine. This colourless deliquescent solid is a salt that is highly soluble in water. Its properties are similar to those for related salts, such as calcium chloride. It is used in photography. It is also used in cat food as a source of iodine.

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