"Diazo process" redirects here. For the reproduction of prints using the diazo chemical process, see Whiteprint.
Diazonium compounds or diazonium salts are a group of organic compounds sharing a common functional group[R−N+≡N]X− where R can be any organic group, such as an alkyl or an aryl, and X is an inorganic or organic anion, such as a halide.