1. Compounds bearing the group N3, viz. –N=N+=N; usually attached to carbon, e.g. PhN3 phenyl azide or azidobenzene.
  2. Salts of hydrazoic acid, HN3, e.g. NaN3 sodium azide.
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1320