Diallyl phthalate

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A colorless, oily liquid commonly used as a Plasticizer in many types of polymers. Diallyl phthalate will self-polymerize unless it is inhibited. As a Polymer, it is used for low-pressure laminated cloth and paper.

Chemical structure

Diallyl phthalate.jpg

Synonyms and Related Terms

DAP; diallyl ester o-phthalic acid; di-2-propenyl ester-1,2-benzenedicarboxylic acid


  • Toxic by ingestion.
  • Irritating to eyes and skin
  • Combustible. Flash point = 166 C
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in most organic solvents. Partially soluble in glycols, gasoline, mineral oil and glycerol. Insoluble in water.

Composition C14H14O4
CAS 131-17-9
Melting Point -70 C
Density 1.120 g/ml
Molecular Weight mol. wt. = 246.3
Refractive Index 1.517
Boiling Point 158-165 C

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 31
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.517