CHEMICAL AND PHYSICAL PROPERTIES
Physical Description | 2-butene appears as a colorless liquefied petroleum gas. Asphyxiate gas. Flammability limits in air 1.8-9.7% by volume. |
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Color/Form | Colorless gas |
Odor | Slightly aromatic odor |
Boiling Point | 3.73 °C at 760 mm Hg /cis-2-Butene/ |
Melting Point | -139.3 °C /cis-2-Butene/ |
Flash Point | -19.99 °C (-3.98 °F) - closed cup |
Solubility | Very soluble in ethanol and ether. Soluble in benzene. /cis- and trans-2-Butene/ |
Density | 0.6042 g/cu cm at 20/4 °C |
Vapor Density | 1.93 (Air = 1) |
Vapor Pressure | 1600 mm Hg at 25 °C /cis-2-Butene/ |
LogP | log Kow = 1.85 (mixture of 70% cis- and 30% trans-2-Butene) |
Henry's Law Constant | Henry's Law constant= 0.224 atm-cu m/mole at 25 °C |
Stability/Shelf Life | Stable under recommended storage conditions. |
Autoignition Temperature | 324 °C (615 °F) |
Decomposition | When heated to decomposition it emits acrid smoke and irritating vapors. |
Viscosity | 0.00763 mPa |
Heat of Combustion | -2708 kJ/mol |
Heat of Vaporization | 21.37 kJ/mol |
Surface Tension | 0.0132 dyn/cm at 25 °C |
Odor Threshold | 2700 mg/cu m |
Refractive Index | Index of refraction: 1.3848 at 25 °C/D |
Kovats Retention Index | 406.42 408.4 408 412.3 414 410.2 410 410 405 412 412 410 411 406 405 412 406.1 409 406 408 408 406 383 411 417 |
Other Experimental Properties | Hydroxyl radical reaction rate constant = 6.00X10-11 cu cm/mole-sec at 25 °C (isomer average) |
Chemical Classes | UVCB |
SAFETY INFORMATION
Signal word | Danger |
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Pictogram(s) |
Flame Flammables GHS02 |
GHS Hazard Statements |
H220:Flammable gases H280:Gases under pressure |
Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P410+P403:Protect from sunlight. Store in a well-ventilated place. |
COMPUTED DESCRIPTORS
Molecular Weight | 56.11 g/mol |
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XLogP3 | 2.3 |
Hydrogen Bond Donor Count | 0 |
Hydrogen Bond Acceptor Count | 0 |
Rotatable Bond Count | 0 |
Exact Mass | 56.062600255 g/mol |
Monoisotopic Mass | 56.062600255 g/mol |
Topological Polar Surface Area | 0 Ų |
Heavy Atom Count | 4 |
Formal Charge | 0 |
Complexity | 15.2 |
Isotope Atom Count | 0 |
Defined Atom Stereocenter Count | 0 |
Undefined Atom Stereocenter Count | 0 |
Defined Bond Stereocenter Count | 1 |
Undefined Bond Stereocenter Count | 0 |
Covalently-Bonded Unit Count | 1 |
Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
2-butene appears as a colorless liquefied petroleum gas. Asphyxiate gas. Flammability limits in air 1.8-9.7% by volume.