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A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4 (CH3)2. They are produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions. (From McGraww-Hill Dictionary of Scientific and Technical Terms, 5th ed)

Xylol.

Same as Xylol.

Dimethyl-benzene, G6H4-(CH3)2, known in three isomeric liquid forms. [Gr., xylon, wood.]