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 79
+ + oH^y* OH,/Y>H NhAA|NHj in acid or alkaline solution. 1 : 8-diamido- or dioxynaphthalene 4-sulphonic acidOH OH NH2 NH2 S03H S03H 54 SYNTHETIC DYESTUFFS. … The conditions r„re various in the case of the amidonaphthol sulphonicacids. Biilow (Ghem. Ztg., xix. 1011) divides them into the following classes:—(1) Such as are either incapable of being coupled at all, or, if so, only To these belong the sulphonic acids of the 1 : 2 and 2 : 1 amidonaphthols.…
Dyes and dyeing
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