Synthetic colouring matters; dyestuffs derived from pyridine, quinoline, acridine and xanthene (1922)
Hewitt, John Theodore, 1868- · London, New York, Longmans, Green · leaf 239
228 SYNTHETIC COLOURING MATTERS … The intermediate products (I) and (II) were capable of isolation; the hydrochloride was not recognised as an oxonium salt but the elements of hydrochloric acid were supposed to attach themselves to carbon atoms.1 In the light of our present knowledge, the hydrochloride must be represented by…
Dyes and dyeing -- Chemistry
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