| Identification | Back Directory | [Name]
Beryllium fluoride | [CAS]
7787-49-7 | [Synonyms]
BeF2
BERYLLIUM FLUORIDE
Beryllium difluoride
Beryllium fluoride,97%
berylliumfluoride(bef2)
berylliumfluoride[bef2]
Beryllium fluoride 99.5%
Beryllium fluoride,98.5+%
Beryllium fluoride (BeF2)
Beryllium fluoride(Be2F4)
Berylliumfluoride,99.9%(metalsbasis)
Berylliumfluoride,32.5-33.5%aq.soln.,99.9%(metalsbasis) | [EINECS(EC#)]
232-118-5 | [Molecular Formula]
BeF2 | [MDL Number]
MFCD00014194 | [MOL File]
7787-49-7.mol | [Molecular Weight]
47.01 |
| Chemical Properties | Back Directory | [Appearance]
white powder | [Melting point ]
545 °C
| [Boiling point ]
1169°C (estimate) | [density ]
1,986 g/cm3 | [solubility ]
very soluble in H2O; slightly soluble in ethanol | [form ]
Powder | [color ]
White | [Water Solubility ]
very soluble H2O [MER06]; slightly soluble alcohol [HAW93] | [EPA Substance Registry System]
Beryllium difluoride (7787-49-7) |
| Hazard Information | Back Directory | [Chemical Properties]
white powder | [Definition]
ChEBI: The fluoride salt of beryllium (+2 oxidation state). In the solid state it exists as a glass, with four-coordinate Be2+ tetrahedral centres and two-coordinate fluoride centres. As a gas it adopts a linear triatomic structure and in the
liquid state a fluctuating tetrahedral structure. In protein crystallography it is used as a mimic of phosphate. | [Uses]
manufacture of Be and Be alloys; manufacture of glass; in nuclear reactors. | [General Description]
Odorless white solid. Denser than water. | [Air & Water Reactions]
Water soluble. | [Reactivity Profile]
Beryllium fluoride is incompatible with the following: Acids, caustics, chlorinated hydrocarbons, oxidizers, magnesium, molten lithium . | [Health Hazard]
Any dramatic weight loss should be considered as possible first indication of beryllium disease. Inhalation causes irritation of nose, throat, and lungs, severe pneumonitis, and/or pulmonary edema. Ingestion causes fatigue, weakness, loss of appetite. Contact with eyes causes severe irritation and burns. Contact with skin causes dermatitis and non-healing ulcers. | [Fire Hazard]
Special Hazards of Combustion Products: Toxic and irritating vapor of unburned material may form in fire. | [Hazard]
A known carcinogen. Toxic by inhalation and ingestion. | [Description]
Beryllium fluoride has the formula, BeF2, and is
a hygroscopic, amorphous solid with a melting point
of 800°C. It is soluble in water and is used in beryllium
metallurgy in which the metal, Be, is employed as an
alloy. Solid crystalline BeF2 has a silica-like structure with
beryllium in a four-coordinate position. | [Physical properties]
Glassy solid; tetragonal crystal system; hygroscopic; density 2.1 g/cm3; melts BERYLLIUM FLUORIDE 101 at 552°C; vaporizes at 1,169°C; very soluble in water; sparingly soluble in alcohol. | [Preparation]
Beryllium fluoride is made by thermal decomposition of ammonium beryllium fluoride at 900 to 950°C. | [Safety Profile]
Confirmed carcinogen withexperimental carcinogenic and tumorigenic data byinhalation. Poison by ingestion, subcutaneous,intravenous, and intraperitoneal routes. Incompatible with Mg. When heated to decomposition, itemits very toxic fumes of BeO and F |
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