Indanthrene Yellow GK

Technical Observations. Indantlirene red 5 GK is formed by benzoylation of 1,4-diaminoanthraquinone, and indanthrene yellow GK by benzoylation ot the 1,5 isomer. 

Indanthrene blue RS from -aminoanthraquinone. 321 Indanthrene yellow GK. 322... 

Anthraquinone Vat dyes. Benzoylation of 1,5-diaminoanthra-quinone gives C.I. Vat Yellow 3, 61725 Indanthrene Yellow GK (BASF) (Figure 2.37). There is a related terephthaloyl derivative (Figure 2.38). 

In an analogous manner, indanthrene red 5 GK is prepared by benzoylation of 1,4-diaminoanthraquinone (page 232), and algol yellow WG by benzoylation of 1-aminoanthraquinone (page 231). 

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