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| Isobutane | |
|---|---|
| General | |
| Systematic name | Isobutane 2-Methylpropane |
| Molecular formula | C4H10 |
| SMILES | C(C)CC |
| Molar mass | 58.08 g/mol |
| Appearance | colorless gas |
| CAS number | * |
| Properties | |
| Density and phase | 2.51 g/l, gas (15 °C, 1 atm) |
| Solubility in water | Insoluble |
| Melting point | −159.6 °C (113.6 K) |
| Boiling point | −11.7 °C (261.5 K) |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Highly flammable (F+) |
| NFPA 704 | |
| R-phrases | |
| S-phrases | , , |
| Flash point | flammable gas |
| Autoignition temperature | 460 °C |
| Explosive limits | 1.8–8.4% |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Related alkanes | Isopentane Neopentane |
| Related compounds | Butane |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Chemical infobox | |
Isobutane, also known as methylpropane or 2-methylpropane, is an alkane, isomeric with butane. Recent concerns with depletion of the ozone layer by freon gases have led to increased use of isobutane as a gas for refrigeration systems, especially in domestic refrigerators and freezers, and as a propellant in aerosol sprays. When used as a refrigerant or a propellant, isobutane is also known as R600a.
Nomenclature
Isobutane is the name recommended by the International Union of Pure and Applied Chemistry (IUPAC) in its 1993 Recommendations for the Nomenclature of Organic Chemistry.
See also
Reference
External links
- IUPAC Nomenclature of Organic Chemistry (online version of the "Blue Book")
- Molview from bluerhinos.co.uk See Isobutane in 3D
- Data from Air Liquide
"Isobutane"