Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by chemical form]
7. compounds (materials)

Anotations

Scope note:

White, crystalline compound formerly used extensively as wood preservative, antiseptic and disinfectant, insecticide, and, in archival conservation, a fungicide for paper and books. Due to its toxicity mercuric chloride's use is now restricted in the U.S.