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wax

The Columbia Encyclopedia, Sixth Edition

wax substance secreted by glands on the abdomen of the bee and known commonly as beeswax; also various substances resembling beeswax. Waxes are mixtures comprising chiefly esters of monohydroxy alcohols, besides other esters and free fatty acids, free alcohols, and higher hydrocarbons. They differ from fats in that fats contain chiefly esters of glycerol. Waxes are generally harder and less greasy than fats, but like fats they are less dense than water and are soluble in alcohol and ether but not in water. Among the waxes derived from plants are carnauba wax, obtained from the leaves of a palm grown in Brazil, and candelilla wax, produced by a Mexican plant ( Euphorbia antisyphilitica ). Those of animal origin include wool wax, or lanolin, obtained from the surface of wool fibers and used in making certain creams, ointments, and soaps, in the processes of finishing and softening leather, and as an ingredient of some paints and varnishes; spermaceti , obtained from the sperm whale, and Chinese wax, which is deposited on certain trees in parts of Asia (especially China and India) by a species of scale insect. Mineral waxes include ozocerite and paraffin , both composed of hydrocarbons. Japan wax and bayberry (or myrtle) wax are composed chiefly of fats.

Bibliography: See L. Roth and J. Weiner, Waxes, Waxing and Wax Modifiers (1961); H. Bennett, Industrial Waxes (2 vol., 1963); P. E. Kolattukudy, ed., Chemistry and Biochemistry of Natural Waxes (1976).

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The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press