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dimethyl phthalate

Product name dimethyl phthalate
Synonyms dimethyl ester of o-phthalic acid
GOST 8728-88
CAS 131-11-3

Dimethyl phthalate is a colorless oily liquid; miscible with ethanol, benzene, diethyl ether, acetone, chloroform; almost insoluble in water.


Dimethyl phthalate is produced by the reaction of phthalic anhydride with methanol in the presence of concentrated sulfuric acid H2SO4 as a catalyst. After neutralization with water alkali metal hydroxides or carbonates, the excess methanol is recovered and recycled and phthalates are purified by vacuum distillation.


Dimethyl phthalate is used as plasticizer for cellulose esters, vinyl polymers, rubbers; due to low toxicity it used as component for repellents.

Manufacturer(s) JSC Kuskovsky chemical plant
Chemical structure of dimethyl phthalate

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