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[DuPont] A registered trademark for a solvent composed of Decahydronaphthalene. Decalin® is a very strong solvent that dissolves oils, fats, waxes, resins, and Rubber. It has been used as a substitute for turpentine and as a cleaning fluid. Decalin® is used in stain removers, cleaning fluids and floor waxes. At one point, Decalin® was used as a varnish remover for oil paintings (Doerner 1934).

Synonyms and Related Terms

decaline; DeKalin; hydroterpene; decahydronaphthalene; naphthalane; naphthane


  • Combustible. Moderate fire risk.
  • Skin and eye irritant.
  • Decalin Chemicals: MSDS

Physical and Chemical Properties

Soluble in ethanol, ether. Insoluble in water.

Composition C10H18
CAS 91-17-8
Melting Point -43.2 C
Density 0.877 g/ml
Molecular Weight mol. wt. = 138.25
Refractive Index 1.4697-1.4811
Boiling Point 185-194 C

Resources and Citations

  • M.Doerner, The Materials of the Artist, Harcourt, Brace & Company, 1934.
  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2903