Trimethylbenzenes

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	hemellitene	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

References

"Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 13". The National Center for Biotechnology Information. ncbi.nlm.nih.gov. Retrieved 7 September 2016.
"Trimethylbenzene - all isomers". The Scottish Environment Protection Agency. apps.sepa.org.uk. Retrieved 7 September 2016.
"1,3,5-Trimethylbenzene". Sigma-Aldrich Co. LLC. sigmaaldrich.com. Retrieved 7 September 2016.

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[1] "Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 13". The National Center for Biotechnology Information. ncbi.nlm.nih.gov. Retrieved 7 September 2016.

[2] "Trimethylbenzene - all isomers". The Scottish Environment Protection Agency. apps.sepa.org.uk. Retrieved 7 September 2016.

[3] "1,3,5-Trimethylbenzene". Sigma-Aldrich Co. LLC. sigmaaldrich.com. Retrieved 7 September 2016.