M-Clarity™ quality level = MQ200
114669-100G
114669-25G
114669-100GEA
254
EUR
InStock
114669-100G
114669-25G
4-(4-Nitrophénylazo)résorcinol 90% (teneur en colorant), Sigma-Aldrich®
4-(4-Nitrophénylazo)résorcinol
4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)₂ in alkaline solution. It is mainly used for determining the presence of magnesium in the solution. 4-(4-Nitrophenylazo)resorcinol is a pH indicator.