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A transparent, viscous solvent with an odor of lilac. Terpineol is an unsaturated cyclic terpenoid found in many essential oils and turpentine. It is made synthetically for use in perfumes, soaps, and paints. In paints, terpineol acts as a diluent but also a thickener and it prevents the brushmarks from leveling. Terpineol dries to a matte surface.

Synonyms and Related Terms

terpene alcohol; turpentine alcohol; terpilenol; Nopol [Glidden]; p-Menth-1-en-8-ol; 4-trimethyl-3-cyclohexene-1-methanol

Chemical structure



  • Combustible. Flash point > 100 C (> 212 F)
  • Contact may cause irritation
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in ethanol. Slightly soluble in hot water, glycerol.

Composition C10H17OH
CAS 98-55-5
Melting Point 2 C
Density 0.930-0.936 g/ml
Molecular Weight mol. wt.=154.25
Refractive Index 1.4825-1.4850
Boiling Point 214-224 C

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 832
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Kurt Wehlte, The Materials and Techniques of Painting, Van Nostrand Reinhold Co., New York, 1975
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9316
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998