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)
8. oxides

Anotations

Scope note:

Oxide appearing as an olive-brown or blue-black anhydrous powder when stannous oxalate is heated out of contact with the air. Uses include manufacturing of other tin compounds, as a reducing agent, and as an ingredient in creating ruby glass.