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 137
(3) Both Alizarine and Quinizarine yield Purpurine on oxidation. The only formulae in accordance with these facts are those given in thefollowing equations:—
Dyes and dyeing
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