The formazans are compounds of the general formula [R−N=N−C(R')=N−NH−R"], formally derivatives of formazan [H2NN−CHN=NH], unknown in free form. Formazan dyes are artificial chromogenic products obtained by reduction of tetrazolium salts by dehydrogenases and reductases.
The formazans are compounds of the general formula [R−N=N−C(R')=N−NH−R"], formally derivatives of formazan [H2NN−CHN=NH], unknown in free form. Formazan dyes are artificial chromogenic products obtained by reduction of tetrazolium salts by dehydrogenases and reductases.
Source: Wikipedia "Formazan" · CC BY-SA 4.0
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