… ‑ Cyanides and cyanide oxides : 2837.11 ‑ ‑ Of sodium 2837.19 ‑ ‑ Other 2837.20 ‑ Complex cyanides Subject … and atmospheric nitrogen on sodium carbonate, by treating calcium cyanamide (see heading 31.02) with charcoal or by …
… commercial alkali metal silicates. ‑ Of sodium : 2839.11 ‑ ‑ Sodium metasilicates 2839.19 ‑ ‑ Other … products (see Explanatory Note to heading 38.24). (2) Potassium silicates . Used for similar purposes to sodium …