Tricresyl phosphate

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Colorless or pale yellow, oily liquid. Tricresyl phosphate is used as a solvent and plasticizer in Polyvinyl chloride, Cellulose nitrate, Mastic and some commercial lacquer formulations. It is also used industrially as a flame retardant, a Lead Scavenger in Gasoline, and a waterproofing agent.

Chemical structure

Tricresyl phosphate.jpg

Synonyms and Related Terms

TCP; tritolyl phosphate; phosphoric acid tris-(methylphenyl)ester; tri-o-cresyl phosphate; o-cresyl phosphate; o-tolyl phosphate; TOCP


Physical and Chemical Properties

Miscible with organic solvents and oils. Insoluble in water.

Composition (CH3C6H4O)3PO
CAS 78-30-8
Melting Point 11 C
Density 1.162 g/ml
Molecular Weight mol. wt. =368.4
Refractive Index 1.556
Boiling Point 275-280 C

Resources and Citations

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 135
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9892

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