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]
7. supercritical fluid

Anotations

Scope note:

Carbon dioxide held at or above its critical temperature and pressure in a fluid state. Like all supercritical fluids, its properties are intermediate between those of gases and liquids. Supercritical carbon dioxide has numerous applications as a cleaning, protecting, and consolidating agent in the conservation of materials such as paper, waterlogged wood, stone, and deteriorated textiles.