IRIS Toxicological Review of Trimethylbenzenes (External Review Draft)
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Trimethylbenzenes (TMB) are a mixture of three isomers: 1,2,3-, 1,2,4- and 1,3,5-TMB. TMBs are produced during petroleum refining, and 1,2,4-TMB makes up approximately 40% of a certain petroleum product (the C9 fraction) which is used as a component of gasoline. Because of this, vehicle emissions are a major source of TMBs. Other uses of TMBs include solvents in research and industry, dyestuff intermediate, paint thinner, and as a UV oxidation stabilizer for plastics.
|Feb 2012||EPA hosted an interagency science consultation meeting on the review of the draft Toxicological Review of Trimethylbenzenes.|
|May 2012||EPA sent an abbreviated version of the toxicological review containing only information on 1,2,3-trimethylbenzene for Interagency Science Consultation at the recommendation of reviewers.|
|Jun 2012||EPA released the external peer review draft of the trimethylbenzenes assessment for public review and comment. [Federal Register Notice June 29, 2012]|
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