The halide anions are essential for supporting life. Therefore, anion analyses of paramount importance. For this reason, we have performed both qualitative and quantitative ana- lyses halides (chloride, bromide, iodide) using the Tl(III) complex azodye, 4-(2-pyridylazo)re- sorcinol (PAR), a potential new chemical reagent/sensor that utilizes substitution reaction whereas Tl(III)PAR reacts with ...