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| CAS No.: | 7637-07-2 | |||
|---|---|---|---|---|
| Name: | Boron trifluoride | |||
| Article Data: | 392 | |||
| Molecular Structure: | ||||
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| Formula: | BF3 | |||
| Molecular Weight: | 67.8062 | |||
| Synonyms: | Boronfluoride (BF3) (8CI); ANCA 1040; Boron fluoride; Boron trifluoride;Trifluoroborane; Trifluoroboron | |||
| EINECS: | 231-569-5 | |||
| Density: | 0.87 | |||
| Melting Point: | -20 C | |||
| Boiling Point: | 59 C at 4.00 hPa | |||
| Flash Point: | 4 ºC | |||
| Solubility: | Hydrolysis | clear to pale yellow liquid | ||
| Hazard Symbols: |
 
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| Risk Codes: | R11;R14;R24/25;R26;R35;R39/23/24/25 | |||
| Transport Information: | UN 1008 | |||
| PSA: | 0.00000 | |||
| LogP: | 0.87980 | |||
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Chemistry
Molecular Formula: BF3
Molar mass: 67.8062 g/mol
EINECS: 206-766-4
Density: 0.90 g/mL at 20 °C
Flash Point: 4 °F
Index of Refraction: 1.38
Boiling Point: -100 °C(lit.)
Melting point: -127 °C(lit.)
Sensitive: Moisture Sensitive
Appearance: Colourless gas with a pungent odor
Water solubility: Soluble in water and slowly hydrolyzed by cold water to give hydrofluoric acid
Structure of Boron trifluoride (CAS NO.7637-07-2):
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Product categories of Boron trifluoride (CAS NO.7637-07-2): Pharmaceutical Intermediates;Inorganics;Compressed and Liquefied Gases;Electronic Chemicals;Fluorides;Compressed and Liquefied Gases;Compressed and Liquefied Gases;Catalysis and Inorganic Chemistry;Lewis Acids;Synthetic Reagents
Uses
Boron trifluoride (CAS NO.7637-07-2) has been applied as dopant in ion implantation and initiates polymerisation reactions of unsaturated compounds. It is p-type dopant for epitaxially grown silicon and can be used as a catalyst in some isomerization, alkylation, esterification, condensation, Mukaiyama aldol addition, and other reactions. It could be used in sensitive neutron detectors in ionization chambers and devices to monitor radiation levels in the Earth's atmosphere and as a flux for soldering magnesium .Another, it is used to prepare diborane.
Production
Boron trifluoride (CAS NO.7637-07-2) is manufactured by the reaction of boron oxides with hydrogen fluoride:
B2O3 + 6 HF → 2 BF3 + 3 H2O
On a laboratory scale, it is produced by the thermal decomposition of diazonium salts:
PhN2BF4 → PhF + BF3 + N2
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| dog | LC | inhalation | > 1000ppm/3H (1000ppm) | LUNGS, THORAX, OR RESPIRATION: STRUCTURAL OR FUNCTIONAL CHANGE IN TRACHEA OR BRONCHI LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION | National Technical Information Service. Vol. OTS0546539, |
| guinea pig | LC50 | inhalation | 109mg/m3/4H (109mg/m3) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BLOOD: HEMORRHAGE LUNGS, THORAX, OR RESPIRATION: CYANOSIS | Farmakologiya i Toksikologiya Vol. 35, Pg. 369, 1972. |
| mouse | LC50 | inhalation | 3460mg/m3/2H (3460mg/m3) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: CYANOSIS BLOOD: HEMORRHAGE | Farmakologiya i Toksikologiya Vol. 35, Pg. 369, 1972. |
| rat | LC50 | inhalation | 1180mg/m3/4H (1180mg/m3) | "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 27, 1982. |
Consensus Reports
Reported in EPA TSCA Inventory. EPA Extremely Hazardous Substances List.
Safety Profile
A poison by inhalation. A strong irritant. See also BORON COMPOUNDS and FLUORIDES. A nonflammable gas. Dangerous; when heated to decomposition or upon contact with water or steam, will produce toxic and corrosive fumes of F−. Incompatible with alkali metals, alkaline earth metals (except Mg), alkyl nitrates, and CaO.
Hazard Note: Corrosive/Toxic
Hazard Codes: 
T,
T+,
C,
F
Risk Statements:
R10:Flammable.
R11:Highly flammable.
R14 :Reacts violently with water.
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed.
R26:Very toxic by inhalation.
R35:Causes severe burns.
R39:Danger of very serious irreversible effects.
R41:Risk of serious damage to the eyes.
R67:Vapours may cause drowsiness and dizziness.
Safety Statements:
S8:Keep container dry.
S16:Keep away from sources of ignition.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S28:After contact with skin, wash immediately with plenty of soap-suds.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
Standards and Recommendations
OSHA PEL: CL 1 ppm
ACGIH TLV: CL 1 ppm
DFG MAK: 1 ppm (3 mg/m3)
NIOSH REL: (Boron Trifluoride) No Exposure Limit
DOT Classification: 2.3; Label: Poison Gas
Specification
Boron trifluoride ,its cas register number is 7637-07-2. It also can be called Trifluoro Boron ; Trifluoro-borane and Fluorure de bore . It is a useful Lewis acid and a versatile building block for other boron compounds. This pungent colourless toxic gas forms white fumes in moist air.Upon contact with water, steam or when heated to decomposition, Boron trifluoride will produce toxic fluoride fumes. Incompatible with alkyl nitrates, calcium oxide. Reaction with alkali metals or alkaline earth metals (except magnesium) will cause incandescence.