Application Note: Fading of Phenolphthalein in NaOH
28 June 2016

The topic of this application is to calculate the reaction rate of fading of phenolphthalein, this depends on the ionic strength or the ion concentration of the reaction solutions. Phenolphthalein is commonly used as a color indicator to check changes in pH, since it changes its color from colorless to pink at a pH over 8.