TAWFEEQ , N.; AL-ENIZZ, M. . Indirect spectrophotometric determination of phenylephrine hydrochloride using potassium permanganate and toluidine blue dye. Journal of Wahj Al-Ulom for Pure Sciences, [S. l.], v. 1, n. 3, 2025. DOI: 10.33899/jwups.v1i3.28976. Disponível em: https://edusj.uomosul.edu.iq/index.php/jwups/article/view/28976. Acesso em: 10 sep. 2025.