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Alfa Aesar is proud to offer our line of indicators, many of which are available in both solutions and powdered forms.
Indicators are related to stains and dyes. These reagents indicate the presence, absence, or concentration of another substance by means of a characteristic color change. Indicators are commonly used to determine pH or to detect the presence of metal ions.
Please refer to our table of indicators which lists our indicators by name and gives the approximate pH range and color change for each one.