| I0140 | Iodine for chemical purposes | 010365 | I0115 |
| I0141 | Iodine for industrial purposes | 010368 | I0120 |
| I0143 | Iodised albumen | 010034 | A0272 |
| I0144 | Iodised salts | 010366 | I0113 |
| I0146 | Ion exchangers [chemical preparations] | 010255 | E0077 |
| I0157 | Iron salts | 010290 | F0060 |
| I0172 | Isinglass other than for stationery, household or alimentary purposes | 010618 | I0002 |
| I0175 | Isotopes for industrial purposes | 010369 | I0144 |
| K0001 | Kainite | 010140 | K0001 |
| K0003 | Kaolin | 010370 | K0003 |
| K0010 | Ketones | 010164 | C0408 |
| K0025 | Kieselgur | 010371 | K0008 |
| K0068 | Krypton | 010372 | K0012 |
| L0020 | Lactic acid | 010373 | L0014 |
| L0032 | Lamp black for industrial purposes | 010316 | N0081 |
| L0057 | Lanthanum | 010375 | L0133 |
| L0095 | Lead acetate | 010440 | P0605 |
| L0096 | Lead arsenate | 010083 | A0761 |
| L0097 | Lead oxide | 010441 | O0160 |
| L0109 | Leather (Currying preparations for –) | 010215 | C1291 |
| L0113 | Leather (Mastic for –) | 010192 | M0197 |
| L0119 | Leather glues | 010222 | C1565 |
| L0130 | Leather-dressing chemicals | 010223 | C1588 |
| L0131 | Leather-impregnating chemicals | 010224 | C1576 |
| L0132 | Leather-renovating chemicals | 010175 | C1577 |
| L0133 | Leather-waterproofing chemicals | 010364 | C1575 |
| L0139 | Lecithin [raw material] | 010588 | L0164 |
| L0152 | Lenses (Preparations for preventing the tarnishing of –) | 010377 | L0180 |
| L0214 | Lime (Nitrogenous –) [manure] | 010141 | C1647 |
| L0216 | Lime acetate | 010171 | C0640 |
| L0217 | Lime carbonate | 010172 | C0642 |
| L0218 | Lime chloride | 010173 | C0643 |
| L0222 | Limestone hardening substances | 010301 | F0305 |
| L0263 | Liquid rubber | 010144 | C0197 |
| L0264 | Liquids for removing sulphates from accumulators | 010500 | A0039 |
| L0265 | Liquids for removing sulphates from batteries | 010500 | A0039 |
| L0266 | Liquifying chemicals (Starch- –) [ungluing agents] | 010056 | A0435 |
| L0270 | Lithia [lithium oxide] | 010378 | L0306 |
| L0272 | Lithium | 010379 | L0308 |
| L0276 | Litmus paper | 010419 | P0095 |
| L0300 | Loam | 010527 | T0204 |
| L0347 | Lutetium [cassiopium] | 010153 | C0330 |
| M0019 | Magnesite | 010382 | M0021 |
| M0021 | Magnesium carbonate | 010147 | M0018 |
| M0022 | Magnesium chloride | 010383 | M0023 |
| M0026 | Magnetic fluid for industrial purposes | 010642 | F0306 |
| M0051 | Malt albumen | 010035 | A0271 |
| M0065 | Manganate | 010384 | M0094 |
| M0067 | Manganese dioxide | 010124 | B0428 |
| M0071 | Mangrove bark for industrial purposes | 010385 | M0101 |
| M0086 | Manure for agriculture | 010271 | E0314 |
| M0117 | Masonry preservatives, except paints and oils | 010380 | M0017 |
| M0125 | Mastic (Grafting –) for trees | 010341 | M0188 |
| M0126 | Mastic for leather | 010192 | M0197 |
| M0127 | Mastic for tires [tyres] | 010193 | M0198 |
| M0168 | Meat (Chemical preparations for smoking –) | 010317 | V0221 |
| M0178 | Meat tenderizers for industrial purposes | 010545 | V0220 |
| M0217 | Mercuric oxide | 010389 | O0159 |
| M0218 | Mercury | 010387 | M0272 |
| M0220 | Mercury salts | 010388 | M0275 |
| M0223 | Metal annealing preparations | 010393 | M0294 |
| M0227 | Metal earths | 010392 | M0310 |
| M0229 | Metal hardening preparations | 010249 | M0291 |
| M0230 | Metal tempering preparations | 010393 | M0294 |
| M0231 | Metalloids | 010390 | M0287 |
| M0232 | Metals (Alkaline –) | 010560 | M0296 |
| M0233 | Metals (Alkaline-earth –) | 010039 | M0295 |
| M0239 | Methane | 010394 | M0313 |
| M0240 | Methyl benzene | 010577 | B0295 |
| M0241 | Methyl benzol | 010576 | B0300 |
| M0242 | Methyl ether | 010284 | M0314 |
| M0252 | Microorganisms (Cultures of –) other than for medical and veterinary use | 010596 | C1627 |
| M0255 | Microorganisms (Preparations of –) other than for medical and veterinary use | 010596 | C1627 |
| M0264 | Mildew (Chemical preparations to prevent –) | 010395 | M0364 |
| M0273 | Milk ferments for chemical purposes | 010374 | L0015 |
| M0293 | Mineral acids | 010396 | M0376 |
| M0338 | Moderating materials for nuclear reactors | 010179 | M0419 |
| M0341 | Moistening [wetting] preparations for use in bleaching | 010127 | M0497 |
| M0342 | Moistening [wetting] preparations for use in dyeing | 010398 | M0498 |
| M0343 | Moistening [wetting] preparations for use in the textile industry | 010530 | M0499 |
| M0346 | Mold-release preparations | 010237 | D0066 |
| M0350 | Molding preparations (Foundry –) | 010307 | F0328 |
| M0382 | Mordants for metals | 010633 | M0456 |
| M0405 | Motor fuel (Chemical additives to –) | 010020 | A0096 |
| M0417 | Mould-release preparations | 010237 | D0066 |
| M0421 | Moulding preparations (Foundry –) | 010307 | F0328 |
| M0450 | Muds (Drilling –) | 010136 | B0682 |
| M0469 | Must-fining preparations | 010200 | C0995 |
| N0016 | Naphtalene | 010399 | N0004 |
| N0048 | Neodymium | 010400 | N0039 |
| WIPO Nice Classification - Class 1 6/10 | |||