Indanthrene Yellow

Incamat, a. flesh-colored, inchromiereu, v.t. (Metal.) chromize. Indanthren-blau, n. indanthrene blue, -gdb, n. indanthrene yellow. 

The kinetic spectra of Aurine, Indanthrene Yellow, and Golden-Orange are similar to those of Chlorophyll. 

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... 

Other dyes that can be used in this procedure are Indanthrene Brilliant Violet and Indanthrene Yellow. 

The early anthraquinone vat dyes were all blue or greenish-blue shades, but the fusion of 2 amino-anthraquinone at higher temperatures produced a yellow vat dye known as Flavanthrone or Indanthren Yellow G (C.I. VAT YELLOW 1), (19) ... 

Colorless crystal needles. The anhydrous salt is stable in air. The trihydrate (flakes with a nacreous luster) and the tetra-hydrate (rhombohedral leaflets) are more labile. Soluble in H3O. The solution acts as a bleaching agent and is quite resistant to acids. The reducing activity increases markedly with temperature the rH values of a formic acid solution at pH 3 are (25 °C) 15 (50°C) 2 (90°C) a maximum of 0.5. Decomposes on prolonged boiling. The warm solution turns alkaline indanthrene yellow G paper blue and decolorizes an alcoholic solution of neutral red. 

Synonyms Cl 70600 Flavanthrone yellow Indanthrene yellow G Pigment yellow 24 Vat yellow 1... 

Indanthrene brown R. See Vat brown 3 Indanthrene brown BR. See Vat brown 1 Indanthrene golden yellow. See Vat yellow 4 Indanthrene yellow G. See Flavanthrone Indanthrone CAS 81-77-6... 

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). 

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