Boron Tribromide
Structural Formula Vector Image
Title: Boron Tribromide
CAS Registry Number: 10294-33-4
Molecular Formula: BBr3
Molecular Weight: 250.52
Percent Composition: B 4.32%, Br 95.69%
Literature References: Prepn: Gamble, Inorg. Synth. 3, 27 (1950); Becher in Handbook of Preparative Inorganic Chemistry Vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 781. Review of boron halides: Massey, Adv. Inorg. Chem. Radiochem. 10, 1-152 (1967). Review of toxicology and human exposure: Toxicological Profile for Boron (PB93-110674, 1992) 110 pp. Brief review of synthetic applications: E. G. Doyagüez, Synlett 2005, 1636-1637.
Properties: Colorless, fuming liquid; dec by water or alcohol. mp -46.0°; bp 90°. d0 2.698. Vapor pressure data: Barber et al., J. Chem. Eng. Data 9, 137 (1964). Store under dry inert atmosphere. Reacts violently with water, alcohols.
Melting point: mp -46.0°
Boiling point: bp 90°
Density: d0 2.698
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, respiratory system; skin and eye burns; dyspnea, pulmonary edema. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 32.
Use: Manuf of diborane; ultra high purity boron. Reagent for cleavage of ethers, amines, thiols; addition of allenes and alkynes.

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