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Names | |
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IUPAC name
Beryllium fluoride
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Other names
Beryllium difluoride
Difluoroberyllane | |
Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.029.198 |
PubChem CID
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RTECS number |
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
BeF2 | |
Molar mass | 47.01 g/mol hygroscopic |
Appearance | colorless, glassy lumps |
Density | 1.986 g/cm3 |
Melting point | 554 °C (1,029 °F; 827 K)[1] |
Boiling point | 1,169 °C (2,136 °F; 1,442 K)[2] |
very soluble | |
Solubility | sparingly soluble in alcohol |
Structure | |
Trigonal, α-quartz | |
P3121 (No. 152), Pearson symbol hP9[3] | |
a = 473.29 pm, c = 517.88 pm
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Linear | |
Thermochemistry | |
Heat capacity (C)
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1.102 J/K or 59 J/mol K |
Std molar
entropy (S⦵298) |
45 J/mol K |
Std enthalpy of
formation (ΔfH⦵298) |
-1028.2 kJ/g or -1010 kJ/mol |
Gibbs free energy (ΔfG⦵)
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-941 kJ/mol |
Hazards[6] | |
GHS labelling: | |
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Danger | |
H301, H305, H311, H314, H315, H319, H330, H335, H372, H411 | |
P201, P202, P260, P264, P270, P271, P273, P280, P281, P284, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P312, P314, P320, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501 | |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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90 mg/kg (oral, rat) 100 mg/kg (oral, mouse)[5] |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 0.002 mg/m3 C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[4] |
REL (Recommended)
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Ca C 0.0005 mg/m3 (as Be)[4] |
IDLH (Immediate danger)
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Ca [4 mg/m3 (as Be)][4] |
Safety data sheet (SDS) | InChem MSDS |
Related compounds | |
Other anions
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Beryllium chloride Beryllium bromide Beryllium iodide |
Other cations
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Magnesium fluoride Calcium fluoride Strontium fluoride Barium fluoride Radium fluoride |
Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Beryllium fluoride is the inorganic compound with the formula BeF2. This white solid is the principal precursor for the manufacture of beryllium metal. Its structure resembles that of quartz, but BeF2 is highly soluble in water.