ANTHRACENE

n. A?n’thra-sen. From dvépaf, coal. Fr., anthracene. Ger., Anthracen. A substance prepared from heavy coal-tar oil, and also synthetically, of the constitution C,4H,4 = CoHEHDO,H,, forming colorle tabular crystals of a marked blue fluorescence, insoluble in water and almost insoluble in alcohol or ether, melting at 213°C. An isomeric modification para-a., or par anthracene forms tabular crystals, distinguished from a. by its difficult solubility in hot benzene and its higher melting point (244° C. llB. 4,159.]—A>carbonic acid. A monobasic crystalline acid, ies 9-CO.OH = C,H i902, being carbonic acid in which a molecul A?n(a®n)-tho?x-a?n(asnY- From éos, a a. replaces a molecule of hydroxyl. There are two isomeric. 2, 4.J—-A. dichloride, forms differing in their melting points, 14H;0Cl,. [B, 4.]—A. di- A substance forming acicular crystals, hydride. A crystalline substance, C,H. =. _[B, 4 A. hex a hydride. A substance forming toliate erystals, C,4H, SyaHyo.Hg- [B, 4.]—A. hydrate. See ANTHRAPHENOL.—A’sulphonte acid. ‘ An acid, C,4H,.SOzH, formed by the combination of a, with sulphuric acid. ‘Inere are two varieties: a, forming yellow crystals, prismatic or tabular; and B, crystallizing in long prisms. [B, ef