Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by physical state]

Narrower term/s

• supercritical carbon dioxide

Anotations

Scope note:

Any substance held at or above its critical temperature and pressure in a fluid state. The properties of a supercritical fluid are intermediate between those of the substance in its gaseous and liquid states. A supercritical fluid can both penetrate material like a gas and dissolve material like a liquid.