| 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] | [Specific Heat Capacity]
Cp(crystal):1.10189J/(g·K),at 25℃ | [crystal system]
Six sides | [Space group]
P6222 | [Lattice constant]
| a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.481 | 0.481 | 0.524 | 90 | 90 | 120 | 0.1048 |
| [InChI]
InChI=1S/Be.2FH/h;2*1H/q+2;;/p-2 | [InChIKey]
JZKFIPKXQBZXMW-UHFFFAOYSA-L | [SMILES]
[Be](F)F | [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. | [Manufacturing Process]
First, beryllium hydroxide is dissolved in an ammonium hydrogen fluoride solution. The resulting ammonium tetrafluoroberyllate is dissociated to a small extent in the solution that the pH can be varied over a wide range without precipitating beryllium hydroxide. Impurities can thus be precipitated relatively easily as hydroxides. Aluminum is precipitated as hydroxide by increasing the pH to 8.3. Chromium and manganese are precipitated by oxidation with lead dioxide, and manganese is precipitated by oxidation with lead dioxide and manganese dioxide. Copper, nickel, and lead are precipitated as sulfides. Ammonium tetrafluoroberyllate is freely soluble in water. When concentrated by evaporation, it crystallizes without water or hydration. Above 130 ?C, it dissociates into ammonium fluoride and beryllium fluoride. Between 900 and 1100 ?C, ammonium tetrafluoroberyllate dissociates into gaseous beryllium fluoride and gaseous ammonium fluoride. The latter can be recycled into the process as ammonium hydrogen fluoride by dissolving it in aqueous hydrogen fluoride. Cooling produces beryllium fluoride as vitreous grains.
| [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 |
|
| Company Name: |
Energy Chemical
|
| Telephone: |
400-0056266 |
| Website: |
www.energy-chemical.com |
| Company Name: |
Rhawn Reagent
|
| Telephone: |
400-400-1332688 18019345275 |
| Website: |
http://www.rhawn.cn |
|