Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. [sodium and sodium compounds]
8. sodium compounds

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by function
6. bleach

Anotations

Scope note:

A white crystalline solid, usually encountered as a powder, used as a bleach for wood pulp, and as a versatile reducing agent which converts ketones and aldehydes to the related alcohols.