Barnett, E. de Barry (Edward de Barry), 1886-1961 · New York : D. Van Nostrand · leaf 152
t the shades obtained are very loose as the dyes are rather unstable and in the presence of acids readily decompose into the quinone and the diamine : NMe2 The indamines and the indophenols can be prepared by two methods, viz. — I. A quinone imide or quinone diimide is condensed with an amine or a… … the diamino- or amino-oxy-diphenylamine (III) then being oxidized to the dyestuff (IV) either by the air or at the expense of another molecule of the quinonoid. R 2. 9
Dyes and dyeing · Coal-tar colors
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