Barium fluoride CAS 7787-32-8

Introduction：Basic information about Barium fluoride CAS 7787-32-8, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

Barium fluoride Basic information

• Product Name: Barium fluoride
• Synonyms: BARIUM FLUORIDE, 99.99%, EXTRA PURE;Barium fluoride, 99%, pure;Barium fluoride, extra pure;Barium fluoride, Puratronic, 99.99% (metals basis);Barium Fluoride, Puratronic (Metals Basis);Barium(II) fluoride 99.99+%;BARIUM FLUORIDE 99.99 SUPRAPUR;Barium fluoride 99.99% trace metals basis
• CAS: 7787-32-8
• MF: BaF2
• MW: 175.32
• EINECS: 232-108-0
• Product Categories: Barium Salts;Ultra-High Purity Materials;Ba;Barium;Chemical Synthesis;Inorganic Salts;Materials Science;Metal and Ceramic Science;Synthetic Reagents;metal halide;Fluoride;Industrial/Fine Chemicals;Inorganic Chemicals;Barium Salts;BariumMetal and Ceramic Science;Inorganic Salts;Inorganics;Salts;Synthetic Reagents;Crystal Grade Inorganics
• Mol File: 7787-32-8.mol

Barium fluoride Chemical Properties

Melting point	1354 °C
Boiling point	2260 °C(lit.)
density	4.89 g/mL at 25 °C(lit.)
vapor pressure	0Pa at 20℃
refractive index	1.4741
Fp	2260°C
storage temp.	Store at +5°C to +30°C.
solubility	1.2g/l
form	random crystals
color	White
Specific Gravity	4.89
Water Solubility	1.6 g/L (20 ºC)
Crystal Structure	CaF2 type
Sensitive	Hygroscopic
Merck	14,974
crystal system	Cube
Solubility Product Constant (Ksp)	pKsp: 6.74
Space group	Fm3m
Lattice constant	a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.62 0.62 0.62 90 90 90 0.238
Exposure limits	ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Dielectric constant	7.3600000000000003
Stability:	Stable. Incompatible with acids.
InChI	1S/Ba.2FH/h;2*1H/q+2;;/p-2
InChIKey	OYLGJCQECKOTOL-UHFFFAOYSA-L
SMILES	F[Ba]F
CAS DataBase Reference	7787-32-8(CAS DataBase Reference)
NIST Chemistry Reference	Barium fluoride(7787-32-8)
EPA Substance Registry System	Barium fluoride (BaF2) (7787-32-8)

Safety Information

• Hazard Codes: Xn,T
• Risk Statements: 20/22
• Safety Statements: 28-28A
• RIDADR: UN 2811 6.1/PG 3
• WGK Germany: 1
• RTECS: CQ9100000
• Hazard Note: Toxic
• TSCA: TSCA listed
• HazardClass: 6.1
• PackingGroup: III
• HS Code: 28261990
• Storage Class: 13 - Non Combustible Solids
• Hazard Classifications: Acute Tox. 4 Inhalation Acute Tox. 4 Oral
• Toxicity: LD50 orally in Rabbit: 250 mg/kg

Barium fluoride Usage And Synthesis

Description

Barium fluoride (chemical formula: BaF2) is a inorganic salt consisting of barium and fluorine. It appears as a transparent crystal and is presented in the mineral frankdicksonite in nature.

Barium fluoride has many applications. It can be used for the manufacturing of optical components such as lenses as well as the windows of infrared spectroscopy. It can also be used as scintillators for detection of X-rays, Gamma rays and other high energy particles. In aluminium-metallurgy, it is used as additive in aluminium refining process. It can also be used as a flux and opacifying agent during the enamel and glazing first production. Moreover, it is also applied in the production of welding agents. Barium fluoride is made through the reaction between barium carbonate with ammonium fluoride.

References

https://www.webelements.com/compounds/barium/barium_difluoride.html
https://en.wikipedia.org/wiki/Barium_fluoride
http://www.solvay.com/en/markets-and-products/featured-products/Barium-fluoride.html

Description

Barium fluoride appears as colourless, odourless crystals/white powder and is slightlysoluble in water but soluble in ethanol and methanol. When heated, barium fluoridedecomposes and emits toxic fumes of fluorine and barium. Barium fluoride is used asa preopacifying agent and in enamel and glazing frits production. Its other use is in theproduction of welding agents (an additive to some fluxes, a component of coatings forwelding rods and in welding powders). It is also used in metallurgy as a molten bath forrefining aluminium.

Chemical Properties

Barium fluoride, BaF2, is a white crystal or powder.Under the microscope crystals may be clear and colorless. Barium fluoride is used commercially in combination with other fluorides for arc welding (qv) electrode fluxes.

Physical properties

Barium fluoride (BaF2), also known as barium(II)fluoride, is a solid which can also be a transparentcrystal. Its molecular weight is 175.34 g/mol. It occursin nature as the mineral “Frankdicksonite”. It occurs asa white powder with a melting point of 1290 and a boiling point of 2259°C. It is slightly soluble in water(0.159 at 0.0°C and 0.162 g/100 ml of water at 20°C). The solid generally assumes the fluorite structure, butwhen subjected to high pressure, changes to the PbCl2structure. In the vapor phase, the BaF2 molecule isnonlinear with an F–Ba–F angle of approximately 108°C.

Uses

Barium Fluoride is used in ceramic flux, carbon brushes for electrical equipment, glass making, in the manufacture of other fluorides, crystals for spectroscopy, electronics and dry-film lubricants. Barium Fluoride is used in spectroscopic components. Barium Fluoride is often suitable for applications in the passive IR band (8 to 14 ?m) and is often used as a viewport window for thermography.

Uses

As a flux and opacifier in vitreous enamels; in the manufacture of carbon brushes for DC motors and generators; in heat-treating metals; in embalming; in glass manufacture.

Production Methods

A single crystal of Barium fluoride is grown from the melt solution by the Kyropoulos method and the Stockbarger method.

Application

Barium fluoride is used as the transmission window in λ: 150 nm–10 mm and as the Reststrahlen filter in λ: 30–60 mm.

Flammability and Explosibility

Non flammable

Safety Profile

A poison by ingestionand intraperitoneal routes. Moderately toxicby subcutaneous route. An experimentalteratogen. See also FLUORIDES andBARIUM COMPOUNDS (soluble). Whenheated to decomposition it emits toxicfumes of F-.

Solubility in water

Barium fluoride is soluble in water with the solubility of 0.17 g/100 g H₂O (10 ℃). It is also soluble in acid and ammonium chloride.

Purification Methods

Wash it well with distilled H2O and dry it in a vacuum. Its solubility in H2O is 1.6g (10o), 1.6g (20o) and 1.62g (30o) per L, and is soluble in mineral acids and aqueous NH4Cl. It may be stored in glass bottles. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 234 1963.]

Structure and conformation

The space lattice of Barium fluoride (BaF2) belongs to the cubic system, and its calcium fluoride structure has a lattice constant of a=0.6187 nm and Ba–F=0.268 nm.

Barium fluoride Preparation Products And Raw materials

• Raw materials: Hydrogen fluoride-->Barium carbonate