Share this entry
diazonium Line breaks: di|azo¦nium
Pronunciation: /ˌdʌɪəˈzəʊnɪəm/

Definition of diazonium in English:


[as modifier] Chemistry
An organic cation containing the group —N2+ bonded to an organic group. Aromatic diazonium compounds are typically intensely coloured and include many synthetic dyes: a diazonium salt diazonium chloride
More example sentences
  • Phenol can be produced from aniline by reacting aniline with a mixture of sodium nitrite and hydrochloric acid to give benzene diazonium chloride, that when heated gently, gives off nitrogen to leave phenol.
  • The manufacture of PY74 would most likely occur through diazotization of 2-amino - 5-nitroanisole to the corresponding diazonium salt and condensation of the diazonium salt with o-acetoacetanisidide.
  • These nitrites then react to form a diazonium salt which in turn reacts with a chromogen to produce the final color.


Late 19th century: coined in German from diazo- (indicating the presence of two nitrogen atoms) + the suffix -onium (from ammonium).

Definition of diazonium in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources