Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. [nitrogen and nitrogen isotopes, compounds]
8. nitrogen compounds
9. nitrogen oxides

Anotations

Scope note:

A colorless, sweet-smelling, sweet-tasting, non-flammable, slightly water-soluble gas, N2O. It is used chiefly as an anesthetic in dentistry and surgery, and in the manufacture of chemicals, such as aerosols.