Dimethyl phthalate is an organic compound with a molecular formula of C10H10O4 and a molecular weight of 194.19. It is a colorless, transparent, slightly yellow oily liquid with a slight aromatic aroma. It is miscible with general organic solvents such as ethanol and ether, but insoluble in water and petroleum ether.

Used as a gas chromatography stationary phase; This product is a plasticizer with strong solubility in various resins, which can dissolve with various cellulose resins, rubber, and vinyl resins. It has good film-forming, adhesive, and waterproof properties. Often used in conjunction with diethyl phthalate for the production of cellulose acetate films, varnishes, transparent papers, and molding powders. A small amount is used in the production of nitrocellulose. It can also be used as a plasticizer for nitrile rubber. This product can also be used as a solvent for mosquito repellent oil (crude oil), polyvinyl fluoride coating, methyl ethyl ketone peroxide, and DDT.