Explanatory notes
… inorganic bases containing no oxygen, such as ammonia (heading 28.14), or hydrazine (heading 28.25), and those … hydroxide). (b) Oxides and hydroxides constituting ores ( headings 26.0 1 to 26.17 ), scalings, ash, slag, dross, scum … of hydrogen of heading 22.01 (water), heading 28.45 (heavy water), heading 28.47 (hydrogen peroxide), or heading …