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

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by form
6. materials by chemical form
7. elements

Anotations

Scope note:

A nonmetallic element of the halogen family with atomic number 53 and symbol I. It is a dark crystalline solid used as an additive to salt to prevent iodine insufficiency and is used in dyes, photographic film, x-ray contrast media, and other applications.