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Naphthalene :: Naphthalene (n.) A white crystalline aromatic hydrocarbon, C10H8, analogous to benzene, and obtained by the distillation of certain bituminous materials, such as the heavy oil of coal tar. It is the type and basis of a large number of derivatives among organic compounds. Formerly called also naphthaline..

Fluoranthene :: Fluoranthene (n.) A white crystalline hydrocarbon C/H/, of a complex structure, found as one ingrdient of the higher boiling portion of coal tar..

Pyrene :: Pyrene (n.) One of the less volatile hydrocarbons of coal tar, obtained as a white crystalline substance, C16H10..

Anthracene :: Anthracene (n.) A solid hydrocarbon, C6H4.C2H2.C6H4, which accompanies naphthalene in the last stages of the distillation of coal tar. Its chief use is in the artificial production of alizarin..

Pyridine :: Pyridine (n.) A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorless liquid with a peculiar pungent odor. It is the nucleus of a large number of organic substances, among which several vegetable alkaloids, as nicotine and certain of the ptomaines, may be mentioned. See Lutidine..

Phlorone :: Phlorone (n.) A yellow crystalline substance having a peculiar unpleasant odor, resembling the quinones, and obtained from beechwood tar and coal tar, as also by the oxidation of xylidine; -- called also xyloquinone..

Quinoline :: Quinoline (n.) A nitrogenous base, C9H7N obtained as a pungent colorless liquid by the distillation of alkaloids, bones, coal tar, etc. It the nucleus of many organic bodies, especially of certain alkaloids and related substances; hence, by extension, any one of the series of alkaloidal bases of which quinoline proper is the type..

Cryptidine :: Cryptidine (n.) One of the quinoline bases, obtained from coal tar as an oily liquid, C11H11N; also, any one of several substances metameric with, and resembling, cryptidine proper..

Naphtha :: Naphtha (n.) One of several volatile inflammable liquids obtained by the distillation of certain carbonaceous materials and resembling the naphtha from petroleum; as, Boghead naphtha, from Boghead coal (obtained at Boghead, Scotland); crude naphtha, or light oil, from coal tar; wood naphtha, from wood, etc..

Pyrrol :: Pyrrol (n.) 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..

Coal Tar :: Coal tar () A thick, black, tarry liquid, obtained by the distillation of bituminous coal in the manufacture of illuminating gas; used for making printer's ink, black varnish, etc. It is a complex mixture from which many substances have been obtained, especially hydrocarbons of the benzene or aromatic series..

Asphaltum :: Asphaltum (n.) A composition of bitumen, pitch, lime, and gravel, used for forming pavements, and as a water-proof cement for bridges, roofs, etc.; asphaltic cement. Artificial asphalt is prepared from coal tar, lime, sand, etc..

Picene :: Picene (n.) A hydrocarbon (C/H/) extracted from the pitchy residue of coal tar and petroleum as a bluish fluorescent crystalline substance.

Leucoline :: Leucoline (n.) A nitrogenous organic base from coal tar, and identical with quinoline. Cf. Quinoline..

Paraffine :: Paraffine (n.) A white waxy substance, resembling spermaceti, tasteless and odorless, and obtained from coal tar, wood tar, petroleum, etc., by distillation. It is used as an illuminant and lubricant. It is very inert, not being acted upon by most of the strong chemical reagents. It was formerly regarded as a definite compound, but is now known to be a complex mixture of several higher hydrocarbons of the methane or marsh-gas series; hence, by extension, any substance, whether solid, liquid, or

Aniline :: Aniline (n.) An organic base belonging to the phenylamines. It may be regarded as ammonia in which one hydrogen atom has been replaced by the radical phenyl. It is a colorless, oily liquid, originally obtained from indigo by distillation, but now largely manufactured from coal tar or nitrobenzene as a base from which many brilliant dyes are made..

Carbolic :: Carbolic (a.) Pertaining to, or designating, an acid derived from coal tar and other sources; as, carbolic acid (called also phenic acid, and phenol). See Phenol..

Phenol :: Phenol (n.) A white or pinkish crystalline substance, C6H5OH, produced by the destructive distillation of many organic bodies, as wood, coal, etc., and obtained from the heavy oil from coal tar..

Pseudo-cumene :: Pseudo-cumene (n.) A hydrocarbon of the aromatic series, metameric with mesitylene and cumene, found in coal tar, and obtained as a colorless liquid..

Viridine :: Viridine (n.) A greenish, oily, nitrogenous hydrocarbon, C12H19N7, obtained from coal tar, and probably consisting of a mixture of several metameric compounds which are higher derivatives of the base pyridine..

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