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Skeletal formula Ball-and-stick model
CAS number 95-63-6 YesY
ChemSpider 6977 YesY
KEGG C14533 YesY
ChEBI CHEBI:34039 YesY
Jmol-3D images Image 1
Molecular formula C9H12
Molar mass 120.19 g/mol
Appearance Clear, colorless liquid
Density 0.8761 g/cm3
Melting point −43.78 °C (−46.80 °F; 229.37 K)
Boiling point 169 to 171 °C (336 to 340 °F; 442 to 444 K)
MSDS Sigma-Aldrich MSDS
EU classification Harmful (Xn); Dangerous for the environment (N)
Flash point 44.4 °C (111.9 °F; 317.5 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

1,2,4-Trimethylbenzene is a colorless liquid with chemical formula C9H12. It is a flammable aromatic hydrocarbon with a strong odor. It occurs naturally in coal tar and petroleum (about 3%). It is nearly insoluble in water but well-soluble in ethanol, diethyl ether, and benzene.

Industrially, it is isolated from the C9 aromatic hydrocarbon fraction during petroleum distillation. Approximately 40% of this fraction is 1,2,4-trimethylbenzene.


1,2,4-Trimethylbenzene dissolved in mineral oil is used as a liquid scintillator. It is also used as a sterilizing agent and in the manufacture of dyes, perfumes, and resins. Another major use is as a gasoline additive.[2]


  1. ^ Merck Index, 11th Edition, 7929
  2. ^ "Chemical Summary for 1,2,4-Trimethylbenzene" (text). United States Environmental Protection Agency. 1994-08-01. Retrieved 2008-01-28. 

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