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 155
different by a close examination of their crystallineform and solubility. Bernthsen (Ber., 1887, xx. 179) examined these dimethylsafranines, and alsocame to the conclusion that they were different. He therefore, with Nietzki,adopted an asymmetrical formula proposed by Witt (Ber., 1886, xix. 3121):—… … (aniline), (p-diamidodiphenylamine). (leucosafranine). For some time the asymmetric formula was accepted as correct, until Kornerand Schraube showed that it had been founded upon an error, and that the twoisomeric dimethylsafranines of Nietzki were in reality identical. This led to the readoption…
Dyes and dyeing
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