CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Boron tribromide appears as a colorless, fuming liquid with a pungent odor. Boiling point 194 °F. Freezing point -51 °F. Very toxic by inhalation. Corrosive to metals and tissue. |
|---|---|
| Color/Form | Colorless, fuming liquid |
| Odor | Sharp, irritating odor |
| Boiling Point | 196 °F at 760 mmHg (USCG, 1999) |
| Melting Point | -51 °F (USCG, 1999) |
| Solubility | Decomposes (NIOSH, 2023) |
| Density | 2.645 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Density | Relative vapor density (air = 1): 8.6 |
| Vapor Pressure | 40 mmHg at 57 °F (NIOSH, 2023) |
| Stability/Shelf Life | Trialkylboranes are stable indefinitely when stored under an inert atmosphere. /Trialkylboranes/ |
| Decomposition | On decomposition, /one mole of/ boron tribromide would be expected to produce three moles of hydrogen bromide. |
| Viscosity | 0.731 cP at 75 °F (liquid) |
| Corrosivity | Strongly attacks metals and wood |
| Heat of Vaporization | 30.5 kJ/mol at 91 °C |
| Surface Tension | 29.1 dynes/cm = 0.0291 N/m at 22 °C |
| Ionization Potential | 9.70 eV |
| Refractive Index | INDEX OF REFRACTION: 1.5312 AT 16.3 °C/D |
| Other Experimental Properties | Decomposes on contact with alcohol. This produces toxic and corrosive fumes of hydrogen bromide. Reacts with water. This produces hydrogen bromide gas. |
| Chemical Classes | Toxic Gases & Vapors -> Other Toxic Gases & Vapors |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 250.53 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 0 |
| Exact Mass | 249.76227 g/mol |
| Monoisotopic Mass | 247.76432 g/mol |
| Topological Polar Surface Area | 0 Ų |
| Heavy Atom Count | 4 |
| Formal Charge | 0 |
| Complexity | 8 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Boron tribromide appears as a colorless, fuming liquid with a pungent odor. Boiling point 194 °F. Freezing point -51 °F. Very toxic by inhalation. Corrosive to metals and tissue.