Diethyl Phthalate (DEP) for over 30 years. We manufacture DEP for different industries such as perfumery and cosmetics. We ensure high quality standards by consistently meeting all technical and quality specifications of Diethyl Phthalate required by various our customers. Diethyl Phthalate (DEP) is a member of the group of phthalic acid esters known as phthalates. DEP is a clear, colorless and odorless liquid.