Beryllium fluoride

Beryllium fluoride
Names
	IUPAC name Beryllium fluoride
	Other names Beryllium difluoride; Difluoroberyllane
Identifiers
CAS Number	7787-49-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:49499 ;
ChemSpider	22992 ;
ECHA InfoCard	100.029.198
PubChem CID	24589;
RTECS number	DS2800000;
UNII	499FU9DQ5C ;
CompTox Dashboard (EPA)	DTXSID50873983 ;
	InChI InChI=1S/Be.2FH/h;21H/q+2;;/p-2 Key: JZKFIPKXQBZXMW-UHFFFAOYSA-L ; InChI=1/Be.2FH/h;21H/q+2;;/p-2 Key: JZKFIPKXQBZXMW-NUQVWONBAD;
	SMILES [Be+2].[F-].[F-];
Properties
Chemical formula	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)
Boiling point	1,169 °C (2,136 °F; 1,442 K)
Solubility in water	very soluble
Solubility	sparingly soluble in alcohol
Structure
Crystal structure	Trigonal, α-quartz
Space group	P3121 (No. 152), Pearson symbol hP9
Lattice constant	a = 473.29 pm, c = 517.88 pm
Molecular shape	Linear
Thermochemistry
Heat capacity (C)	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⦵)	-941 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H305, H311, H314, H315, H319, H330, H335, H372, H411
Precautionary statements	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)	90 mg/kg (oral, rat); 100 mg/kg (oral, mouse)
	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)
REL (Recommended)	Ca C 0.0005 mg/m3 (as Be)
IDLH (Immediate danger)	Ca [4 mg/m3 (as Be)]
Safety data sheet (SDS)	InChem MSDS
Related compounds
Other anions	Beryllium chloride; Beryllium bromide; Beryllium iodide
Other cations	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). verify (what is ?) Infobox references

Beryllium fluoride is the inorganic compound with the formula Be F₂. 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.

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