FACTOID #53: If you thought Antarctica was inhospitable, think again - its land area is only ninety-eight percent ice. Reassuringly, the other 2% is categorised as "barren rock".
Dimethyl terephthalate is an organicchemical used in the production of polyesters, including polyethylene terephthalate. It consists of a benzene ring with methyl ester groups attached to the first and fourth carbon. Organic has several meanings and related topics. ... A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions. ... Close-up of a polyester shirt SEM picture of a bend in a high surface area polyester fiber with a seven-lobed cross section Polyester is a category of polymers, or, more specifically condensation polymers, which contain the ester functional group in their main chain. ... Polyethylene terephthalate (aka. ... Benzene, C6H6, PhH, or benzol is a colorless and flammable liquid with a pleasant, sweet smell. ...
Transesterification is used in the synthesis of polyester, in which diesters undergo transesterification with diols to form macromolecules.
For example, dimethylterephthalate and ethylene glycol react to form polyethylene terephthalate and methanol, which is evaporated to drive the reaction forward.
The reverse reaction (methanolysis) is also an example of transesterification, and has been used to recycle polyesters into individual monomers (see plastic recycling).
Dimethylterephthalate is one of the basic monomers used in the synthesis of polyester fibers.
Groups of 50 rats of each sex and 50 mice of each sex were administered dimethylterephthalate at one of two doses, either 2,500 or 5,000 ppm, for 103 weeks, then observed for 2 additional weeks.
Administration of dimethylterephthalate had no appreciable effect on the mean body weights of the rats and mice of either sex.
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