Experimental solubilities are reported for pyrene dissolved in seven binary alcohol + acetonitrile solvent mixtures at 26 degreesC. The alcohol cosolvents studied were 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol, 3-methyl-1-butanol, and 2-pentanol. Results of these measurements are used to test a mathematical representation based upon the Combined Nearly Ideal Binary Solvent (NIBS)/Redlich-Mster equation. For the seven systems studied, the Combined NIBS/Redlich-Mster equation was found to mathematically describe the experimental data to within an overall average absolute deviation of approximately 1.0%.