Dibutyl phthalate is an organic compound with the chemical formula C16H22O4. It can be used as a plasticizer for polyvinyl acetate, alkyd resin, nitrocellulose, ethyl cellulose, chloroprene rubber, and nitrile rubber.

Dibutyl phthalate is a plasticizer with strong solubility for a variety of resins. It is mainly used in polyvinyl chloride processing to give the product good softness. Due to its relatively low price and good processability, it is widely used in China, almost equivalent to DOP. However, its volatility and water extraction are relatively large, so the durability of the product is poor, and its use should be gradually restricted. It can also be used to make paints, adhesives, artificial leather, printing inks, safety glass, celluloid, dyes, pesticides, fragrance solvents, fabric lubricants, etc.