Interaction of Methyl red with Cetylpyridinium chloride in Methanol-water system

The interaction between methyl red (azo dye) and cetylpyridinium chloride (cationic surfactant) in the methanol-water system were studied using a spectrophotometric technique. Variable parameters like constant dye concentration its structure, surfactant concentration, pH, absorbance, solvent composition studied. Using UV-Vis technique, critical micelle concentrations (CMCs) of measured with red. spectral data analyzed determined differential binding partition constants, coefficient, Gibbs free energy mixed media (0.1, 0.2, 0.3, 0.4 volume fraction (v.f.)s methanol, respectively).