Calcium iodide

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.^[1] It is also used in cat food as a source of iodine.

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