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. metal
8. [metal by composition or origin]
9. nonferrous metal
10. [calcium and calcium compounds]
11. calcium compounds
12. calcium oxide

Narrower term/s

• non-hydraulic lime
• nanolime

Anotations

Scope note:

Colorless crystal or soft, white, alkaline powder prepared by reacting calcium oxide (lime) with water in a process called slaking. It is used in paints, dehairing hide, medicines, and in conservation for superficial protective treatments thanks to its conversion into calcium carbonate.