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dihexyl phthalate

Product name dihexyl phthalate
GOST no data
CAS 84-75-3

Dihexyl phthalate (DHP, 1,2-benzenedicarboxylic acid, dihexyl ester phthalic acid) is clear oily liquid with slight odour. Soluble in petroleum ether, benzene, chloroform; almost insoluble in water.


Dihexyl phthalate is produced by esterification of phthalic anhydride with n-hexanol in presence of benzenesulfonic acid as a catalyst. Then mixture is neutralized with water alkali hydroxides or carbonates; the excess n-hexanol is recovered and recycled by treatment with superheated steam; dihexyl phthalate is purified by activated charcoal.


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

Manufacturer(s) JSC Chemplast
Chemical structure of dihexyl phthalate

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