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An aromatic hydrocarbon, C9H12, occurring in petroleum and coal tar or synthesized from acetone and used as a solvent and synthetic intermediate.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(mɪˈsɪtɪˌliːn; ˈmɛsɪtɪˌliːn)
(Elements & Compounds) a colourless liquid that occurs in crude petroleum; 1,3,5-trimethylbenzene. Formula: C6H3(CH3)3
[C19: from mesityl, from mesite, from New Latin mesita, from Greek mesitēs mediator + -ene]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Copolymer Pluronic P123 was used in this approach as a soft template, while a hard template requested was mesoporous silica, various organic molecules such as diamine benzene, 1,3,5-trimethylbenzene were sources of carbon.
Then, 0.023 g of ammonium fluoride and 3 g of 1,3,5-trimethylbenzene were added.
The odor evaluation and the simultaneous identification via GC/MS-O allowed to identify 2-propanone, m,p-xylene, o-xylene, delta-3-carene, 1,2,3-trimethylbenzene, 1,3,5-trimethylbenzene, and ethyltoluene as the odor-active VOCs responsible for the overall perceived odor.
Their experiments showed toluene, m-xylene, p-xylene, and 1,3,5-trimethylbenzene ignite only at temperatures above 900 K and 16 bar, while o-xylene, ethylbenzene, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene, n-propylbenzene, 2-ethyltoluene, and n-butylbenzene ignite at much lower temperatures and pressures.
Compound 1,3,5-trimethylbenzene, which has shorter half-life time (12 h) than styrene, is still present in the vicinity of petrochemical and chemical industrial sites; it is an important solvent used in coatings, cleaners, pesticides, and inks.
Pollutant category Pollutants Inert (nonaromatic, Cyclopentane, methylcyclopentane, nonalkane) methylcyclohexane, sulfur, EC, CO, N[O.sub.2] Polar (nonaldehyde) Acetic acid, 2-butanone, organic carbon Aromatic Benzene, toluene, ethylbenzene, m-xylene and p-xylene, o-xylene, n-propylbenzene, p-ethyltoluene, m-ethyltoluene, 1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene and sec-butylbenzene Aldehyde Benzaldehyde, heptanal, hexanal, octanal Alkane 2,2,4-Trimethylpentane, 2,2-dimethylbutane, 2,3,4-trimethylpentane, 2,3-dimethylbutane.
Values of density ([rho]), molar volume ([V.sub.m]), theoretical and experimental speed of sound ([] and [u.sub.exp]), percent deviation in speed of sound (%[DELTA]u) and isentropic compressibility ([[beta].sub.s]) for six binary mixtures; tetrahydrofuran (THF) + 1,2,4-trimethyl benzene (TMB), tetrahydrofuran (THF) + 1,2,3-trimethyl benzene (TMB), tetrachloromethane (TCM) + 1,2,4-trimethyl benzene (TMB), tetrachloromethane (TCM) + 1,3,5-trimethylbenzene, dimethyl sulfoxide (DMSO) + 1,2,4-trimethyl benzene + dimethyl sulfoxide (DMSO) + 1,3,5-trimethyl benzene at 298.5 K are presented in tables 2-7.