Reichardt's dye

Chemical compound

Reichardt's dye is an organic dye belonging to the class of azomerocyanine betaines. This dye is notable for its solvatochromic properties, meaning it changes color depending on the solvent in which it is dissolved. It has one of the largest solvatochromic effects ever observed, with color varying across the entire visible spectrum. As a result, it gives striking visual results for chemical demonstrations.

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