Figure 6. Nucleophilic discoloration reactions of crystal violet (a) and brilliant blue FCF (b)

From

Experiments to Introduce Students into the Temperature Dependence of the Reaction Rate

Marcel Emmert, Konrad Heß, Patrick Gräb, Ekkehard Geidel

World Journal of Chemical Education. 2020, 8(2), 92-99 doi:10.12691/wjce-8-2-5