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 32
In carrying out the first method, both a- and /^-naphthylamine are used onthe large scale. SULPHONATION. 13 Table showing the sulphonic acids derived from a-naphthylamine bysulphonation {Heumann):— … S S S S Sulphonic acids derived from /^-naphthylamine by sulphonation {Heumann):— NH2
Dyes and dyeing
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