Product Short Description: DIETHYL PHTHALATE LR 99% Product Description: Diethyl phthalate uses Diethyl phthalate is used as a plasticizer in a wide variety of consumer products, including plastic packaging films, cosmetic formulations, and toiletries, as well as in medical treatment tubing. As a result of its use, human exposure to diethyl phthalate is expected to be signi- ficant.