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. plastic (material)
8. [plastic by property]
9. thermoplastic
10. cellulosic
11. cellulose ether

Anotations

Scope note:

A neutral cellulose derivative, hydroxyethyl cellulose (HEC) is a granular, water-soluble thermoplastic polymer used as an emulsifier, thickener and film former in many types of solutions. It is also used as a sizing material.