Invista Sales And Service India Pvt. Ltd. Supplies Dimethyl Terephthalate - DMT in White Color. Invista Sales And Service India Pvt. Ltd. Offers polymers and fibers, primarily for nylon, spandex and polyester applications. Dimethyl Terephthalate - DMT in White Color is crystalline solid of unusual purity at room temperature. Dimethyl Terephthalate - DMT in White Color is an ester of the para-positioned dibasic acid which provides a form that reacts readily and is easy to handle. Because of these features DMT is the principal raw material for the polyester fiber and film industries.