| 2,2,4-Trimethylpentane | |
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| IUPAC name |
2,2,4-Trimethylpentane
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| Other names | Isooctane |
| Identifiers | |
| CAS number | 540-84-1  |
| RTECS number | SA3320000 |
| SMILES |
CC(C)(C)CC(C)C
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| Properties | |
| Molecular formula | C8H18 |
| Molar mass | 114.23 g mol−1 |
| Appearance | colorless liquid |
| Density | 688 kg/m3, liquid |
| Melting point |
-107.38 °C, 166 K, -161 °F |
| Boiling point |
99.3 °C, 372 K, 211 °F |
| Solubility in water | Immiscible |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
−259 kJ/mol |
| Std enthalpy of combustion ΔcH |
−5461 kJ/mol |
| Standard molar entropy S |
328 J·K−1·mol−1 |
| Hazards | |
| MSDS | MSDS |
| EU classification | Flammable (F) Harmful (Xn) Dangerous for the environment (N) |
| R-phrases | R11 R38 R50/53 R65 R67 |
| S-phrases | (S2) S9 S16 S29 S33 S60 S61 S62 |
| Flash point | 4.5 °C |
| Autoignition temperature |
417 °C |
| Explosive limits | 1.1–6.0% |
| Related compounds | |
| Related alkanes | Heptane Octane |
| Related compounds | Hexadecane |
| (what is this?) (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
2,2,4-Trimethylpentane, also known as isooctane or iso-octane, is an octane isomer which defines the 100 point on the octane rating scale (the zero point is n-heptane). It is an important component of gasoline.
Isooctane is produced on a massive scale in the petroleum industry, usually as a mixture with related hydrocarbons. The alkylation process alkylates isobutane with isobutylene using a strong acid catalyst. In the NExOCTANE process, isobutylene is dimerized into isooctene and then hydrogenated to isooctane.[1]
See also
References
External links
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