CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Isobutylene is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its own vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. Its vapors are heavier than air and a flame can flash back to the source of leak very easily. The leak can either be a liquid or vapor leak. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. It is used in the production of isooctane, a high octane aviation gasoline. |
|---|---|
| Color/Form | Colorless gas |
| Odor | Coal gas odor |
| Boiling Point | 19.6 °F at 760 mmHg (NTP, 1992) |
| Melting Point | -220.5 °F (NTP, 1992) |
| Flash Point | -105 °F (NTP, 1992) |
| Solubility | Insoluble (NTP, 1992) |
| Density | 0.59 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density | 1.9 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 1 mmHg at -157.2 °F ; 5 mmHg at -141.7 °F (NTP, 1992) |
| LogP | log Kow = 2.34 |
| Henry's Law Constant | Henry's Law constant = 0.218 atm cu-m/mol at 25 °C |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Autoignition Temperature | 869 °F (USCG, 1999) |
| Decomposition | Hazardous decomposition products formed under fire conditions: Carbon oxides |
| Refractive Index | Index of refraction: 1.3926 at 25 °C |
| Kovats Retention Index | 384 392 391 391 390 390 380 390 385 370 384 390 383 384.2 384.9 387 388 388 386 383 390 400 |
| Other Experimental Properties | Polymerizes easily and reacts with numerous materials |
| Chemical Classes | Other Classes -> Aliphatics, Unsaturated |
COMPUTED DESCRIPTORS
| Molecular Weight | 56.11 g/mol |
|---|---|
| XLogP3 | 2.1 |
| 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 | 23 |
| 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
Isobutylene is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its own vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. Its vapors are heavier than air and a flame can flash back to the source of leak very easily. The leak can either be a liquid or vapor leak. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. It is used in the production of isooctane, a high octane aviation gasoline.