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 108
iazo-compound thus formed with salicylic acid. This leuco-base is finally oxidised. It is an important green mordant dyestuff. Similar colouring matters having the azo-group in the para-position to themethane carbon atom are described by Green and Sen (J.C.S., 1912, ci. 1113).Their mode of… … C02H C02H The substances, so far as their triphenylmethane structure is concerned, are(< leuco compounds, but are yellow dyestuffs by virtue of the azo-groups. Woolis therefore dyed orange-yellow, but the colour is oxidised and changed to blackon the fibre by the action of potassium dichromate.…
Dyes and dyeing
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