- Dimethyl terephthalate (DMT) is an organic compound with the formula C6H4(CO2CH3)2. It is the diester formed from terephthalic acid and methanol. It is a white solid that melts to give a distillable colourless liquid.
- DMT is used in the production of polyesters, including polyethylene terephthalate (PET) and polytrimethylene terephthalate.
- It is a building block for an assortment of products from X-ray and video films to polyester fibers and electrical capacitors.
- Dimethyl terephthalate is recovered from polymer mixtures containing polymers of terephthalic acid & glycol & a chloride polymer, by adding base to neutralize the hydrochloric acid formed by the degradation of the chloride polymer.