CHEMICAL AND PHYSICAL PROPERTIES
Physical Description | Boron trifluoride is a colorless gas with a pungent odor. It is toxic by inhalation. It is soluble in water and slowly hydrolyzed by cold water to give off hydrofluoric acid, a corrosive material. Its vapors are heavier than air. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing. |
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Color/Form | Colorless gas |
Odor | Pungent, suffocating odor |
Boiling Point | -148 °F at 760 mmHg (NIOSH, 2023) |
Melting Point | -196.1 °F (EPA, 1998) |
Solubility | 106 % (in cold H2O) (NIOSH, 2023) |
Density | 1.6 (EPA, 1998) - Denser than water; will sink |
Vapor Density | 2.4 (EPA, 1998) - Heavier than air; will sink (Relative to Air) |
Vapor Pressure | 760 mmHg at -149.26 °F Liquid (EPA, 1998) |
Stability/Shelf Life | Boron trifluoride ... is stable in dry atmospheres. |
Decomposition | Dangerous; when heated to decomposition or upon contact with water or steam, will produce toxic and corrosive fumes of /hydrogen fluoride/. |
Viscosity | 0.0171 m Pa.s (gas) at 25 °C |
Corrosivity | Boron trifluoride will attack some forms of plastics, rubber, and coatings |
Heat of Vaporization | 19.33 kJ/mol at -101 °C |
Surface Tension | 17.2 mN/m at -100 °C |
Ionization Potential | 15.50 eV |
Polymerization | The substance will polymerize unsaturated compounds. |
Odor Threshold | Odor Threshold Low: 1.5 [ppm] Odor threshold from AIHA |
Other Experimental Properties | Forms dense white fumes in moist air; ... reacts with incandescence when heated with alkali metals or alkaline earth metals except magnesium |
Chemical Classes | Toxic Gases & Vapors -> Corrosive Gases |
COMPUTED DESCRIPTORS
Molecular Weight | 67.81 g/mol |
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Hydrogen Bond Donor Count | 0 |
Hydrogen Bond Acceptor Count | 3 |
Rotatable Bond Count | 0 |
Exact Mass | 68.0045147 g/mol |
Monoisotopic Mass | 68.0045147 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 trifluoride is a colorless gas with a pungent odor. It is toxic by inhalation. It is soluble in water and slowly hydrolyzed by cold water to give off hydrofluoric acid, a corrosive material. Its vapors are heavier than air. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing.