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. 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.

Trimethylbenzenes
name	Hemellitene	Pseudocumene	Mesitylene
other names	1,2,3-Trimethylbenzene vic.-Trimethylbenzene	1,2,4-Trimethylbenzene asym.-Trimethylbenzene	1,3,5-Trimethylbenzene sym.-Trimethylbenzene
structural formula
CAS-number	526-73-8	95-63-6	108-67-8