1,2,4-Trimethylbenzene

1,2,4-Trimethylbenzene
IUPAC name 1,2,4-Trimethylbenzene
Other names Pseudocumene, Asymmetrical trimethylbenzene, psi-cumene
Identifiers
CAS number	95-63-6 Y
ChemSpider	6977 Y
KEGG	C14533 Y
ChEBI	CHEBI:34039 Y
Jmol-3D images	Image 1
SMILES c1c(ccc(c1C)C)C
InChI InChI=1S/C9H12/c1-7-4-5-8(2)9(3)6-7/h4-6H,1-3H3 Y Key: GWHJZXXIDMPWGX-UHFFFAOYSA-N Y InChI=1/C9H12/c1-7-4-5-8(2)9(3)6-7/h4-6H,1-3H3 Key: GWHJZXXIDMPWGX-UHFFFAOYAF
Properties
Molecular formula	C9H12
Molar mass	120.19 g/mol
Density	0.8761 g/cm³
Melting point	-43.78 °C
Boiling point	169-171 °C
Hazards
MSDS	Oxford MSDS
EU classification	Harmful (Xn); Dangerous for the environment (N)
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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.

Uses

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.

External links

• EPA Chemical Fact Sheet