| 34140 | Acetic formic anhydride | |
| 34140 | Acetin (mono-, di-, tri-) | |
| 35220 | Acetoacetanilide | |
| 35220 | Acetoacetyl derivatives of cyclic amines | |
| 35230 | Acetoguanamine | |
| 34170 | Acetol | |
| 48251 | Acetometers, non-electric | |
| 34150 | Acetone cyanohydrin | |
| 35323 | Acetone put up as nail polish remover | |
| 34170 | Acetone, not put up as nail polish remover | |
| 34150 | Acetonitrile | |
| 34170 | Acetonylacetone | |
| 34170 | Acetophenone | |
| 34150 | Acetophenoxime | |
| 35250 | Acetorphine (INN), not put up as medicaments | |
| 34150 | Acetoxime | |
| 35220 | Acet-p-phenetidide | |
| 34140 | Acetyl bromide | |
| 34790 | Acetyl cellulose, non-plasticized (excl. textile fibres) | |
| 34790 | Acetyl cellulose, plasticized, in primary forms (excl. in sheets, films, rods or tubes) | |
| 34140 | Acetyl chloride | |
| 34170 | Acetyl-6-ethyl-1,2,3,4-tetrahydro-1,1,4,4-tetramethylnaphthalene | |
| 34170 | Acetylacetone | |
| 35220 | Acetylcholine | |
| 35250 | Acetyldihydrocodeinone, not put up as medicaments | |
| 34110 | Acetylene (excl. heavy acetylene) | |
| 34231 | Acetylene black | |
| 34260 | Acetylene, heavy | |
| 34150 | Acetylmethadol (INN) | |
| 34140 | Acetyl-o-cresotic acids and their salts and esters | |
| 34170 | Acetylphenanthrene | |
| 35210 | Acetylsalicylic acid and its salts and esters | |
| 34320 | Acetyltannin | |
| 34240 | Acid carbonate (sodium hydrogencarbonate) | |
| 94900 | Acidifying deposition (i.e., acid rain) monitoring, controlling and damage assessment services | |
| 48251 | Acidimeters (excl. laboratory glassware) | |
| 37195 | Acidimeters, glass, laboratory (excl. those of group 482) | |
| 35250 | Aconitine, not put up as medicaments | |
| 39120 | Acorns (excl. acorns roasted as a coffee substitute), whether or not pelletized | |
| 23912 | Acorns, edible, roasted as a coffee substitute | |