Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. additive (material)

Anotations

Scope note:

A substance that adds oxygen or removes hydrogen in chemical reaction with another compound. Used as bleaches that whiten or decolorize in conjunction with oxidizing agents. Examples of reducing agents include: sulfites, bisulfites, dithionite, and sodium borohydride.