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. Griffin and company, limited · leaf 116
ns of the two phenol molecules reacting with theoxygen of one of the carbonyl groups. PYRONINE DYESTUFFS. 99 The correctness of this formula is shown by the fact that phthalyl chlorideCO c„h/ >0 also combines with phenol to form phenolphthalein. In the formation of phenolphthalein, however, a… … It is this substance which may be considered as the chromogeu of thephthaleni dyestuffs, since by the entrance of auxochrome groups into itsmolecule, bases or acids are formed which, when converted into their salts,yield the Rhodamines and Eosines. Just as in the Triphenylmethane series and in the…
Dyes and dyeing
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