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2-(5-Bromo-2-pyridylazo)-5-(diethylamino)phenol, for Colorimetric Determination of Cd
2-(5-Bromo-2-pyridylazo)-5-dimethylaminophenol, for Colorimetric Determination of Cd
4-(3,5-Dibromo-2-pyridylazo)-1,3-phenylenediamine, for Colorimetric Analysis of Co, Cd
5-Dimethylamino-2-(2-pyridylazo)phenol, for Determination of Zinc in Serum
PAN, =1-(2-Pyridylazo)-2-naphthol Metal indicator and spectrophotometric reagent for transition metals
PAR, =4-(2-Pyridylazo)resorcinol Spectrophotometric reagent for transition metals