M-Clarity™ quality level = MQ200
323209-25G
323209-5G
323209-25GEA
822
EUR
InStock
323209-25G
323209-5G
4-(2-Pyridylazo)résorcinol 96%, Sigma-Aldrich®
4-(2-Pyridylazo)résorcinol
4-(2-Pyridylazo)resorcinol (PAR) is a monosodium salt(1), dibasic acid that forms the protonated complexes with most metal ions.
4-(2-Pyridylazo)resorcinol (PAR) serves as a metallochromic indicator and is suitable as a chromogenic agent for the quantitative determination of over 50 elements.