Dibutyl phthalate, also known as dibutyl phthalate or dibutyl phthalate, is a colorless, transparent, oily liquid with a specific gravity of 1.045 (21°C) and a boiling point of 340°C. It is insoluble in water, and has low water solubility and volatility, but is easily soluble in organic solvents such as ethanol, ether, acetone and benzene, and can also be miscible with most hydrocarbons. Dibutyl phthalate (DBP), dioctyl phthalate (DOP) and diisobutyl phthalate (DIBP) are the three most common plasticizers, and are commonly used plasticizers for plastics, synthetic rubber and artificial leather. It is made by heating esterification of phthalic anhydride and n-butanol.