The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 160
passes atonce into dihydroflavanthrene hydrate. The structure of this substance istherefore represented by the formula OH I I I I H< A A y\iii III! \y ^/ \y OH (a-Tetrahydroflavanthrene hydrate). The /3-tetrahydro derivative, on the other hand, is exceedingly stable, andseparates as a green… … OH CO 000 CO (Red). (Green). The red alkaline solution of the ^-derivative yields a yellow vat with zinc dustwhich contains /3-hexahydroflavanthrene, C28H1802No. Pyranthrene (Indanthrene golden orange), E.P. 14,57805, 24,48610, A.P.856,811 ; Ber., 1910, xliii. 346; 1911, xliv. 1448.—This important…
Dyes and dyeing
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