D 1717 (OTTO) Dioctyl terephthalate, 96% Cas 6422-86-2 - used in the fabrication of conductive films. D 1717 (OTTO) Dioctyl terephthalate, 96% Cas 6422-86-2 - used as a plasticizer with polyvinyl chloride (PVC) to form solutions for artificial intravessel plaque.