What is tetramethylmethane?

Tetramethylmethane (TMM) is a hydrocarbon with the formula C5H12. It is a colorless liquid with a faint odor that is highly flammable and has a low boiling point of 30 °C. TMM is also known as tetramethylmethane, 2,2,3,3-tetramethylbutane, or isooctane.

TMM is used as a solvent and a fuel additive, particularly in gasoline. It has a high octane rating, making it useful in gasoline blending to prevent engine knock. TMM is also used as a reference compound for gas chromatography.

TMM is formed through the dimerization of isobutene, which is produced during the refining of crude oil or from the cracking of natural gas. It is a non-toxic and non-carcinogenic substance and is considered safe for human exposure at low concentrations. However, it can contribute to air pollution if released into the environment from combustion sources.