Search the Dictionary

Pertaining to, or designating, a tetrabasic acid of benzene obtained as a white crystalline substance; -- probably so called from the resemblance of the wartlike crystals to the mammillæ on the surface of prehnite.

A Sprengel explosive consisting of potassium chlorate and mono- nitrobenzene.

A white crystalline hydrocarbon, polymeric with benzene. It is extracted from pine tar, and is also found in certain fossil resins.

Ring formula (Chem.), a graphic formula in the shape of a closed ring, as in the case of benzene, pyridine, etc. See Illust. under Benzene. -- Ring mail, a kind of mail made of small steel rings sewed upon a garment of leather or of cloth. -- Ring micrometer. (Astron.) See Circular micrometer, under Micrometer. --…

acetylene, as a fragrant, aromatic, mobile liquid; -- called also phenyl ethylene, vinyl benzene, styrol, styrene, and cinnamene.

xidation of the mercaptans, or by treating sulphuric acid with certain aromatic bases (as benzene); as, phenyl sulphonic acid, C6H5.SO2.OH, a stable colorless crystalline substance. Sulphonic group (Chem.), the hypothetical radical, SO2.OH, the characteristic residue of sulphonic acids.

A hypothetical compound, C2H2N4 which may be regarded as benzene with four CH groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.

A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule. Tetrol phenol, furfuran. [Obs.]

A double benzene and thiophene nucleus, C8H6S, analogous to naphthalene, and like it the base of a large series of derivatives. [Written also thionaphtene.]

A sulphur hydrocarbon, C4H4S, analogous to furfuran and benzene, and acting as the base of a large number of substances which closely resemble the corresponding aromatic derivatives.

metameric substances, which are dimethyl derivatives of thiophene, like the xylenes from benzene.

A hydrocarbon, C6H5.CH3, of the aromatic series, homologous with benzene, and obtained as a light mobile colorless liquid, by distilling tolu balsam, coal tar, etc.; -- called also methyl benzene, phenyl methane, etc.

A trade name for a brown dyestuff obtained from certain basic azo compounds of benzene; -- called also Bismarck brown, Manchester brown, etc.

e wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively orthoxylene, metaxylene, and paraxylene. Called also xylol.