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

Anotations

Scope note:

A double salt of sodium bicarbonate and sodium carbonate, forming in white crystalline needles. It is used in the treatment of water for softening or cleaning applications. In conservation, used in solution to stabilize corrosion by removing chlorides and other salts from iron and bronze.