Back فلوريد البيريليوم Arabic فلوئورید بریلیوم AZB Fluorid berylnatý Czech Berylliumfluorid Danish Berylliumfluorid German Φθοριούχο βηρύλλιο Greek بریلیم فلوئورید Persian Berylliumfluoridi Finnish Fluorure de béryllium French बेरिलियम फ्लोराइड Hindi
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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 |
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.
- ^ "Beryllium Fluoride". American Elements. Retrieved 10 July 2023.
- ^ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.
- ^ Wright, Albert F.; Fitch, Andrew N.; Wright, Adrian C. (1988). "The preparation and structure of the α- and β-quartz polymorphs of beryllium fluoride". Journal of Solid State Chemistry. 73 (2): 298. Bibcode:1988JSSCh..73..298W. doi:10.1016/0022-4596(88)90113-2.
- ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
- ^ "Beryllium compounds (as Be)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ "Beryllium Difluoride". PubChem. National Institute of Health. Retrieved October 13, 2017.