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diethyl phthalate

Product name diethyl phthalate
Synonyms phthalic acid diethyl ester
GOST no data
CAS 84-66-2

Diethyl phthalate (DEP, phthalic acid diethyl ester) is clear oily liquid. Soluble in ethanol, chloroform; almost insoluble in water.


Diethyl phthalate is produced by the reaction of phthalic anhydride with ethanol in the presence of concentrated sulphuric acid as a catalyst. After neutralization with water alkali metal hydroxides or carbonates, the excess ethanol is recovered and recycled and phthalates are purified by vacuum distillation.


  • Diethyl phthalate is used as plasticizer for cellulose esters, vinyl polymers, rubbers;
  • As a fixative in fragrances to improve the stability and other characteristics of the main ingredients;

  • Manufacturer(s) OJSC AROMASYNTHEZ
    Chemical structure of diethyl phthalate

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