Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material
7. elastomer
8. [elastomer by composition or origin]

Anotations

Scope note:

Synthetic rubber formed from a salt or other compound which contains two or more sulfur atoms bonded together as an anion or group that are capable of recovering their original shape after being stretched to great extents.