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A nitrogenous base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless liquid, C4H5N, having on odor like that of chloroform. It is the nucleus and origin of a large number of derivatives. So called because it colors a splinter of wood moistened with hydrochloric acid a deep red.

A colorless liquid, C4H4-NH, of agreeable odor, obtained from coal tar, from the products of distillation of horn, bone, feathers, etc., and from the distillation of ammonium saccharate and mucate.