Dimethyl terephthalate, often abbreviated as DMT and identified by the formula C10H10O4, is a white crystalline ester widely used in the production of polyester resins and related chemical intermediates. In processing equipment, exposure to this compound may affect O-rings, rubber seals, gaskets, and certain plastic components, so compatibility evaluation is recommended to minimize swelling or degradation. Although considered relatively low in acute toxicity, contact can cause skin and respiratory irritation. Proper storage and safe handling practices are important.

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