Chapter 28 — Inorganic chemicals; organic or inorganic compounds of precious metals, of rareearth metals,of radioactive elements or of isotopes

Heading 2850 — Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49.

Subheading 2850.00 — Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49.