The synthetic dyestuffs : and the intermediate products from which they are derived (1905)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872-1940 · London : C. Griffen and Co. · leaf 216
ts. The general tendency in the naphthaleneseries is for the sulphonic acid group to migrate in the first instance from analpha-position to a beta-position (when the temperature is raised); and, when theother group in the molecule is an SOsH group, any further migration results ina compound having… … The formation of the latter acid at a higher temperature is regarded as havingbeen preceded by the initial formation of the 1 : 5 acid, which undergoes molecularchange in the direction indicated, at a higher temperature. Further, on sulphonating naphthalene-/J-sulphonic acid we obtain
Dyes and dyeing
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