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. salt (inorganic material)
8. oxalate

Anotations

Scope note:

Refers to oxalate with ammonia commercially produced as colorless crystals used for dyeing textiles and in other applications. In conservation, ammonium oxalate in solution is used as a treatment for calcium carbonate based surfaces (such as limestones, marbles, historical wall paintings). It forms a protective layer of calcium oxalate on surfaces through chemical reaction.