Solubility of disperse dyes in supercritical carbon dioxide

The solubilities of eight disperse dyes, suitable for dyeing from a supercritical medium, have been measured in supercritical carbon dioxide. For two of the dyes, 3-(1H-benzoimidazol-2-yl)-7-(diethylamino)chromen-2-one (C.I. Disperse Yellow 82, DY82) and 1-((4-aminophenyl)azo)-2-naphthol, studies have been made at 80 degrees C and 100 degrees C between 200 bar and 350 bar. The results were correlated using a semi-empirical equation. The remaining six dyes were studied at 200 bar and 80 degrees C, to investigate trends of solubility with molecular properties.