Definition of diazomethane in English:

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Pronunciation: /dīˌazōˈmeTHān/


A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis.
  • Chemical formula: CH2N2.
Example sentences
  • Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA.
  • The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms.
  • Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.


Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane.

For editors and proofreaders

Syllabification: di·az·o·meth·ane

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