4-(3,5-DIBROMO-2-PYRIDYLAZO)-N-ETHYL-N-(3-SULFOPROPYL)ANILINE, MONOSODIUM SALT, MONOHYDRATE

3,5-DiBr-PAESA is a supersensitive chelating agent that can be used for silver (I) determination in water in the case of absence of other interfering ions. 3,5-DiBr-PAESA can also be used for copper (II) determination[1].

[1] Fujimura K, et al. Flow injection spectrophotometric determination of sub-mg dm(-3) silver(I) in a strongly acidic solution containing concentrated copper(II) using a pyridylazo reagent. Anal Sci. 2011;27(12):1197-201. DOI:10.2116/analsci.27.1197