Barium iodide

Barium iodide
Names
	IUPAC name Barium iodide
	Other names Barium iodide, anhydrous
Identifiers
CAS Number	13718-50-8 (anhydrous) ; 7787-33-9 (dihydrate) ; 13477-15-1 (hexahydrate) ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	75507 ;
ECHA InfoCard	100.033.873
EC Number	237-276-9;
PubChem CID	83684;
UNII	WKC4T7680A ;
CompTox Dashboard (EPA)	DTXSID2065597 ;
	InChI InChI=1S/Ba.2HI/h;21H/q+2;;/p-2 Key: SGUXGJPBTNFBAD-UHFFFAOYSA-L ; InChI=1/Ba.2HI/h;21H/q+2;;/p-2 Key: SGUXGJPBTNFBAD-NUQVWONBAS;
	SMILES I[Ba]I; [Ba+2].[I-].[I-];
Properties
Chemical formula	BaI2 (anhydrous) ; BaI2·2H2O (dihydrate)
Molar mass	391.136 g/mol (anhydrous) ; 427.167 g/mol (dihydrate)
Appearance	White orthorhombic crystals (anhydrous) colorless crystals (dihydrate)
Odor	odorless
Density	5.15 g/cm3 (anhydrous); 4.916 g/cm3 (dihydrate)
Melting point	711 °C (1,312 °F; 984 K) (anhydrous) ; decomposes at 740 °C (dihydrate)
Solubility in water	166.7 g/100 mL (0 °C) ; 221 g/100 mL (20 °C) ; 246.6 g/100 mL (70 °C)
Solubility	soluble in ethanol, acetone
Magnetic susceptibility (χ)	−124.0·10−6 cm3/mol
Structure
Crystal structure	PbCl2-type (Orthorhombic oP12)
Space group	Pnma (No. 62)
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−602.1 kJ·mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
Related compounds
Other anions	barium fluoride; barium chloride; barium bromide
Other cations	beryllium iodide; magnesium iodide; calcium iodide; strontium 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

Barium iodide is an inorganic compound with the formula BaI₂. The compound exists as an anhydrous and a hydrate (BaI₂(H₂O)₂), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone.