New Kinetic Spectrophotometric Method for Determination of Fexofenadine Hydrochloride in Pharmaceutical Formulations

Figure 7

Stoichiometry of the reaction between FEX and alkaline potassium permanganate adopting limiting logarithmic method. (a) 𝐶_FEX=2×10⁻⁴M, 𝐶_KMnO4=2.5×10⁻⁴--5.0×10⁻⁴M and (b) 𝐶_KMnO4=1×10⁻³M, 𝐶_FEX=0.46×10⁻⁵--9.29×10⁻⁵M.

(a)

(b)