Phenazopyridine (PPD) an azo dye class of drug is known to provide symptomatic relief for muscles. A simple visible spectrophotometric method is developed and validated for PPD in its pharmaceutical dosage (pyridium), using diazonium salt of 4-Amino benzene sulphonic acid (PABSA) at low temperature. The maximum absorbance of PPD is found to be at max l =422 nm. On reaction with diazonium salt of PABSA, PPD forms red colored azo derivative with maximum absorbance at max l =508nm. The solution obeys Beer’s law in the concentration, range of 1-15m g / mL .The coefficient correlation for the linear curve equation Y=0.032x-0.003is 1.00. Analytical, statistical and optical parameters were calculated from the average absorbance value of 0.2902 and found to be within limits. An average recovery of the solution was made to 95.5%.
