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 chemical form]
7. compounds (materials)

Anotations

Scope note:

Colorless, extremely volatile liquid once primarily used as racing fuel but now banned for safety reasons. Propylene oxide is chiefly used in production of polyurethane plastics. It is also employed as a fumigant for use in agriculture and cultural heritage protection.