Dibutyl Phthalate

Around 11 billion pounds of Dibutyl phthalate are produced each year globally to meet demands. Dibutyl phthalate is produced by reacting n-butanol with phthalic anhydride while in the presence of a concentrated sulphuric acid catalyst. The Dibutyl phthalate is recovered and purified by use of vacuum distillation or through a bed of activated charcoal.


Dibutyl phthalate is often added to polyvinyl chloride as a plasticizer in order to improve it material characteristics. Dibutyl phthalate does not polymerize when added to PVC and allows for PVC molecules to slide along one another without tangling. The ability to avoid the polymers from becoming entangled will increase the flexibility of the PVC, making it more suitable for a number of applications. Vinyl fabrics and raincoats are examples of how Dibutyl phthalate will increase the flexibility of PVC.
Dibutyl phthalate is entirely composed of carbon, oxygen and hydrogen making it ideal for combustion reactions. Dibutyl phthalate is used as a stabilizer within solid rocket propellant as Dibutyl phthalate readily contributes molecules to sustain the combustion reaction at elevated temperatures.


Download – Dibutyl Phthalate Spec from TCC

Shipping Information

TCC’s Dibutyl phthalate is available for shipping throughout the continental United States with one (1) week lead time. Please call (401) 360-2800 for details. Dibutyl phthalate is a liquid packed in bulk (rail, tanktruck, Isotank), totes (IBC tanks), and drums. Special packaging available on request.


Dibutyl phthalate is a colorless and oily liquid at standard condition. Dibutyl phthalate is stable at increased temperatures due to its low vapor pressure and will not boil until 340°C. Dibutyl phthalate’s stability at high temperatures has led it to be commonly used as a plasticizer in polyvinyl chloride (PVC) to increase flexibility and softness. Dibutyl phthalate is soluble in many organic solvents such as ethanol, ether, and benzene but only slightly soluble in water. Additional uses of Dibutyl phthalate include car interiors, vinyl fabrics, elastomers, lacquers, adhesives and solid rocket propellant.

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