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diallyl phthalate[dī′al·əl ′tha‚lāt]
the diallyl ester of o-phthalic acid, C6H4(COOCH2CH=CH2)2; a colorless, oily liquid. Boiling point, 175°C (10 mm of mercury); density, 1,120 kg/m3(20°C); index of refraction nD25 1.490-1.493. It is virtually insoluble in water, gasoline, petroleum oils, glycerol, and glycols but is miscible with ethanol. Diallyl phthalate is made from allyl alcohol and phthalic anhydride in the presence of acid catalysts. It is used as a plasticizer for alkyl resins, chlorinated rubber, polyvinyl chloride, and polyvinyl acetate.