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dibutyl phthalate

Product name dibutyl phthalate
GOST 8728-88
CAS 74-84-2

Dibutyl phthalate (DBP, dibutyl ether of o-phthalic acid) - clear oily liquid with slight odour. It is miscible with ethanol, diethyl ether, acetone, benzene; almost insoluble in water.


Dibutyl phthalate is produced by esterification of phthalic anhydride with n-butanol in presence of benzenesulfonic acid as a catalyst at 120-140°C. Then mixture is neutralized with water alkali hydroxides or carbonates; the excess butanol is recovered and recycled by treatment with superheated steam; dibutyl phthalate is purified by activated charcoal.


Dibutyl phthalate is used as plasticizer for PVC (polyvinylchloride), rubbers and cellulose esters.

Manufacturer(s) JSC Chemplast
JSC Kuskovsky chemical plant
JSC Uralchemplast
Chemical structure of dibutyl phthalate

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