Lanolin

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Description

A semisolid waxy material that is purified from the grease, or degras, extracted from wool. Lanolin is a complex mixture of 33 high molecular weight alcohols and 36 fatty acids, including cholesterol. It also contains about 5% free alcohols and free acids. One of the unique properties of lanolin is that it can incorporate up to 25-30% water without separation. Since it is readily absorbed by skin, lanolin is used as an emollient in leather dressings as well as for cosmetics and ointments. It is also used as a rust preventative.

Synonyms and Related Terms

lanoline; animal wax; wool wax; wool grease; wool fat; lanoline; Lanain; Lanum; adeps lanae; oesipos; Agnolin; Lantrol; Loanilin (Deut., Sven.); Lanolina (Pol);

Other Properties

Soluble in benzene, chloroform, ether, carbon, acetone, ligroin, carbon disulfide and ethanol. Insoluble in water.

Refined: iodine value=15.0-46.9, acid value=5.6-22.0, saponification value = 80-127

Melting Point 36-43
Density 0.932-0.9457
Refractive Index 1.478-1.482

Hazards and Safety

Contact will cause of reaction in persons with wool allergies.

Talas: MSDS

Comparisons

Properties of Natural Waxes


Sources Checked for Data in Record

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • John S. Mills, Raymond White, The Organic Chemistry of Museum Objects, Butterworth Heineman, London, 2nd ed., 1994
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5371
  • Encyclopedia Britannica, http://www.britannica.com Comment: "Lanolin" Encyclopædia Britannica Premium Service. [Accessed 18 Oct. 2005].
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: melting point = 36-43C, density=0.932-0.9457, ref. index = 1.478-1.482, iodine value=15.0-46.9, acid value=5.6-22.0, saponification value = 80-127
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 880
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982