The solubility and dyeing characteristics of a series of new disperse azo dyes containing a pyridine ring were determined in a series of solvents at 85°C and 95°C. Ring substitutents in the dyes were also found to affect the solubility and dyeing characteristics of the dyes. The dyes had improved partition coefficients in perchloro ethylene at 121°C compared to dyes with a phenyl ring.
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