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 360
reduced. Bases, such as aniline, remain in solution as their hydrochlorides; amido-sulphuric acids remain partially or wholly in the residue with the amido-derivative of the second component. In every case preliminary experiments must be tried in order to determinethe best means of isolating the… … (phenanthraquinone), (quinoxaline derivative), and are usually well-defined crystalline compounds which frequently givecharacteristic colours with concentrated sulphuric acid. Thus azo-compounds which contain naphthylamine sulphuric acids as secondcomponents, and which, therefore, yield…
Dyes and dyeing
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