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7637-07-2

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Basic Information
CAS No.: 7637-07-2
Name: Borane, trifluoro-
Article Data: 392
Cas Database
Molecular Structure:
Molecular Structure of 7637-07-2 (Borane, trifluoro-)
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:
Risk Codes: R11;R14;R24/25;R26;R35;R39/23/24/25   
Safety:
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):
                     
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: ToxicT,VeryT+,CorrosiveC,FlammableF
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.