The synthesis of these dyes usually involves a two-step process:
: An aromatic amine reacts with nitrous acid at low temperatures to form a diazonium salt . azo dye
Azo dyes are a dominant class of synthetic organic colorants, characterized by the presence of one or more ( The synthesis of these dyes usually involves a
: The diazonium salt acts as an electrophile, reacting with an electron-rich nucleophile (like a phenol or another aromatic amine) to create the final azo bond. Industrial and Biological Applications azo dye