Dibutyl phthalate, also known as dibutyl phthalate or dibutyl phthalate, English: Dibutylphthalate, is a colorless transparent oily liquid with a specific gravity of 1.045 (21°C) and a boiling point of 340°C, insoluble in water, water-soluble and volatile The properties are very low, but it is easily soluble in organic solvents such as ethanol, ether, acetone and benzene, and is also miscible with most hydrocarbons. Dibutyl phthalate (DBP), dioctyl phthalate (DOP) and diisobutyl phthalate (DIBP) are the three most common plasticizers, which are plastics, synthetic rubber and artificial leather, etc. commonly used plasticizers. It is obtained by thermal esterification of phthalic anhydride and n-butanol.

Colorless transparent oily liquid with slightly aromatic odor. Soluble in common organic solvents and hydrocarbons.