| 34240 | Nickel carbonates, artificial | |
| 34160 | Nickel carbonyl | |
| 34270 | Nickel cyanide | |
| 34240 | Nickel dichloride | |
| 34240 | Nickel fluoroborate | |
| 34140 | Nickel formate | |
| 34280 | Nickel hydride | |
| 34220 | Nickel hydroxides | |
| 34240 | Nickel nitrate | |
| 16190 | Nickel oxide, natural (excl. impure nickel oxides of subclass 41421) | |
| 34220 | Nickel oxides (excl. bunsenite) | |
| 41421 | Nickel oxides, impure | |
| 34220 | Nickel sesquioxide | |
| 41413 | Nickel silver, unwrought | |
| 34240 | Nickel sulphates | |
| 16190 | Nickel sulphide, natural | |
| 88211 | Nickel, metallic coating in by chemical treatment | |
| 88211 | Nickel, metallic coating in by electrolysis | |
| 41422 | Nickel-chromium alloys (nickel predominating), unwrought | |
| 41422 | Nickel-chromium-iron alloys (nickel predominating), unwrought | |
| 41422 | Nickel-copper alloys (nickel predominating), unwrought | |
| 34220 | Nickelic oxide | |
| 14220 | Nickelin | |
| 41422 | Nickel-iron alloys (nickel predominating), unwrought | |
| 41422 | Nickel-magnesium alloys (nickel predominating), unwrought | |
| 41604 | Nickel-magnesium oxide cermets | |
| 34220 | Nickelous hydroxide | |
| 34220 | Nickelous oxide | |
| 35250 | Nicocodine (INN), not put up as medicaments | |
| 35250 | Nicodicodine (INN), not put up as medicaments | |
| 35250 | Nicomorphine (INN), not put up as medicaments | |
| 35250 | Nicotinamide (INN), not put up as medicaments | |
| 35250 | Nicotinamide hydrochloride, not put up as medicaments | |
| 35260 | Nicotinamide hydrochloride, put up as medicaments in measured doses or in forms or packings for retail sale | |
| 34160 | Nicotinamide-adenine dinucleotide | |
| 35250 | Nicotine hydrochloride, not put up as medicaments | |
| 34620 | Nicotine put up as a fungicide in forms or packings for retail sale | |
| 34620 | Nicotine put up as an insecticide in forms or packings for retail sale | |
| 35250 | Nicotine salicylate, not put up as medicaments | |
| 35250 | Nicotine salts, not put up as medicaments | |