Crystalline free radical of chloropromazine.

The method of preparation and the spectral characteristic of the crystalline free radical of chlorpromazine are described. Two absorption maxima at 770 and 860 nm concomitant with those at 530 and 277 nm were found. The highest rate of dismutation of the radical was 4-4.10(-1) M. sec-1 at pH 7-2. The mechanism of luminescence during the decay of the peroxide form of th radical is discussed.