Background :Spectrophotometric procedures are well-liked because of their ease of use, speed, affordability, and wide range of applications. UV spectrophotometry is the most sensitive and precise optical technique for detecting dangerous metals. Aim of the study: The present study aimed to describe how to measure Aluminum (III) spectrophotometrically quickly and accurately using Alizarin dye in a pharmaceutical sample and aqueous solution Methodology:The method (mole ratio) was used to determine the stoichiometry of the complex procedures (2:1) (reagent: ion), after which the calibration graph, repeatability, interferences, and applications were examined. Results:The method is based on the spectrophotometry detection of Alizarin at 494 mm for the determination of Aluminum (III). Besides a detection limit of 0.018 mg/l, the approach enables the determination of a linear range of (0.02-2) mg/l. The relative standard deviation for 1 mg/l is calculated to be 0.6106% with n = 10. Conclusion:After setting the suitable estimation circumstances (pH, concentration, volume, and concentration of Alizarin Dye, duration, and temperature), Aluminum was evaluated using UV-VIS (III). Stability and stoichiometry of 10-4M Alizarin (2:1). Linearity (0.020-2) mg/l, sensitivity 0.011 mg/cm2, reagent limit 0.018 M. (91.670-97.340%) retrieved with the spectral approach for detecting Aluminum (III) in diverse samples