Trimethylbenzene

The trimethylbenzenes constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with three methyl groups (–CH₃) as a substituent.^[1][2] Through their different arrangement, they form three structural isomers with the molecular formula C₉H₁₂. They also belong to the group of C₃-benzenes. The best-known isomer is mesitylene.^[3]

Trimethylbenzenes
Common name	hemimellitene	pseudocumene	mesitylene
Systematic names	1,2,3-trimethylbenzene vic.-trimethylbenzene	1,2,4-trimethylbenzene asym.-trimethylbenzene	1,3,5-trimethylbenzene sym.-trimethylbenzene
Structural formula
CAS Registry Number	526-73-8	95-63-6	108-67-8