| 35250 | Nicotine sulphate, not put up as medicaments | |
| 35250 | Nicotine, not put up as medicaments or insecticides | |
| 35250 | Nicotinic acid (INN), not put up as medicaments | |
| 35250 | Nicotinic acid amide, not put up as medicaments | |
| 35260 | Nicotinic acid amide, put up as medicaments in measured doses or in forms or packings for retail sale | |
| 35250 | Nicotinic ester of vitamin B1 | |
| 35250 | Nicotinomorpholide, not put up as medicaments | |
| 35260 | Nicotinomorpholide, put up as medicaments in measured doses or in forms or packings for retail sale | |
| 35250 | 6-O-nicotinoylcodeine, not put up as medicaments | |
| 54129 | Nightclubs, general construction of | |
| 28227 | Nightdresses, babies', knitted or crocheted | |
| 28235 | Nightdresses, babies', not knitted or crocheted | |
| 28224 | Nightdresses, women's or girls', knitted or crocheted of textile materials | |
| 28234 | Nightdresses, women's or girls', of textile materials, not knitted or crocheted | |
| 28224 | Nightgowns, women's or girls', knitted or crocheted of textile materials | |
| 28234 | Nightgowns, women's or girls', of textile materials, not knitted or crocheted | |
| 46539 | Night-lights | |
| 38999 | Night-lights, of tallow, stearin, paraffin wax or other waxes | |
| 28222 | Nightshirts, men's or boys', knitted or crocheted of textile materials | |
| 28232 | Nightshirts, men's or boys', not knitted or crocheted | |
| 28250 | Nightwear made up of felt or non-woven fabrics (excl. babies') | |
| 28227 | Nightwear, babies', knitted or crocheted | |
| 28235 | Nightwear, babies', not knitted or crocheted | |
| 28222 | Nightwear, men's or boys', knitted or crocheted of textile materials | |
| 28232 | Nightwear, men's or boys', not knitted or crocheted | |
| 28224 | Nightwear, women's or girls', knitted or crocheted of textile materials | |
| 28234 | Nightwear, women's or girls', of textile materials, not knitted or crocheted | |
| 34310 | Nigrosines | |
| 34160 | Nikethamide (INN) | |
| 03230 | Nile gum | |
| 34250 | Niobates, metal | |
| 14290 | Niobite | |
| 34280 | Niobium boride | |
| 34280 | Niobium carbide | |
| 34280 | Niobium hydride | |
| 34280 | Niobium nitride | |
| 41601 | Niobium, unwrought | |
| 42915 | Nippers, nail | |
| 41536 | Nipples, aluminium, for tubes or pipes | |
| 46950 | Nipples, carbon, for joining furnace carbons | |