Aniline black and its applications in dyeing and printing (1909)
Noelting, E. (Emilio), 1851-1922, Lehne, Adolf, 1856-1930 · London : Heywood · leaf 50
34 Aniline Black. rapidly. Three formulie are possible for emeraldine, ^ : — I C3-n=<0='''"<Z>-n-^3nh, iN-O.H, II > NH N — CeH. H H > ■N— N- -N-< \_ III NH By altering the position of the qiiinone group three other veri* analogous formulae are obtained: — H , <d> = NH … NH, .t/H I NH, Emeraldine is still more easily produced by oxidising paramino- diphenylamine in acid solution by means of perchloride of iron or peroxide of hydrogen in the presence of a little ferrous sulphate. The 3deld of pure product, separated from the black siinultaneouslj’ formed bj' means…
Coal-tar colors · Aniline black · Dyes and dyeing
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