The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 162
ndanthrene dark blueBT is a mixture of Indanthrene dark blue BO and Indanthrene violet RT (Chem.Zeit., 1917, xli. 713). The exact position of the coupling rings in these compounds has not as yetbeen determined, although it is evident that they must have a structure verysimilar to that of… … (Violanthrene). When indanthrene green is chlorinated a deep, fast black is produced. Helianthrene (wzeso-Benzdianthrone, Scholl and Mansfeld, Ber., 1910, xliii.1734). The action of copper powder on 1 : 1 or a-dianthraquinonyl dissolvedin concentrated sulphuric acid leads to internal condensation…
Dyes and dyeing
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