![]() | |
![]() | |
![]() | |
Names | |
---|---|
Systematic IUPAC name
Beryllium iodide | |
Identifiers | |
3D model (JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.029.199 |
PubChem CID
|
|
UNII | |
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
BeI2 | |
Molar mass | 262.82112 g·mol−1 |
Appearance | colorless needle-like crystals |
Density | 4.325 g/cm3 |
Melting point | 480 °C (896 °F; 753 K) |
Boiling point | 590 °C (1,094 °F; 863 K)[1] |
reacts with water[1][citation needed] | |
Solubility | Slightly soluble in CS2 Soluble in ethanol, diethyl ether[2] |
Structure | |
orthorhombic | |
Thermochemistry | |
Heat capacity (C)
|
71.14 J/(mol·K) |
Std molar
entropy (S⦵298) |
130 J/(mol·K) |
Std enthalpy of
formation (ΔfH⦵298) |
−192.62 kJ/mol |
Gibbs free energy (ΔfG⦵)
|
−210 kJ/mol |
Std enthalpy of
combustion (ΔcH⦵298) |
19 kJ/mol |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
|
see Berylliosis |
NFPA 704 (fire diamond) | |
NIOSH (US health exposure limits): | |
PEL (Permissible)
|
TWA 0.002 mg/m3 C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[3] |
REL (Recommended)
|
Ca C 0.0005 mg/m3 (as Be)[3] |
IDLH (Immediate danger)
|
Ca [4 mg/m3 (as Be)][3] |
Related compounds | |
Other anions
|
|
Other cations
|
|
Related compounds
|
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Beryllium iodide is an inorganic compound with the chemical formula BeI2. It is a hygroscopic white solid. The Be2+ cation, which is relevant to salt-like BeI2, is characterized by the highest known charge density (Z/r = 6.45), making it one of the hardest cations and a very strong Lewis acid.[4]