2,2,4-Trimethylpentane

2,2,4-Trimethylpentane

Names
Preferred IUPAC name 2,2,4-Trimethylpentane
Other names Isooctane Iso-octane
Identifiers
CAS Number	540-84-1
3D model (JSmol)	Interactive image
ECHA InfoCard	100.007.964
CompTox Dashboard (EPA)	DTXSID7024370
SMILES CC(C)CC(C)(C)C
Properties
Chemical formula	C8H18
Molar mass	114.23 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

2,2,4-Trimethylpentane, also known by the common name isooctane or iso-octane, is an organic compound. It is one of the isomers of octane, an alkane with chemical formula C₈H₁₆. It is used to define the octane rating scale used for measuring gasoline: pure 2,2,4-trimethylpentane has an octane rating of 100.

Name

"Isooctane" is not a systematic name. For lighter hydrocarbons, "iso" is used to mean the isomer of an alkane that has a single branch at the end of the main carbon chain. For octane, this isomer is 2-methylheptane.