| 83392 | Irrigation works, other engineering services for the construction of | |
| 83322 | Irrigation works, project management services concerning the construction of | |
| 83342 | Irrigation works, specialty engineering design services for the construction of | |
| 83342 | Irrigation works, structural engineering design services for the construction of | |
| 83392 | Irrigation works, structural failure investigation of | |
| 83332 | Irrigation works, structural installation appraisal of | |
| 83352 | Irrigation works, technical inspection services during the construction of | |
| 83392 | Irrigation works, undertaking contamination studies of | |
| 83332 | Irrigation works, undertaking environmental impact studies of | |
| 83332 | Irrigation works, undertaking project impact studies of | |
| 83332 | Irrigation works, undertaking technical feasibility studies of | |
| 48150 | Irrigators, colonic | |
| 34160 | Isatic acid, lactam of | |
| 34160 | Isatin | |
| 41262 | I-sections, of iron or non-alloy steel, not further worked than cold-formed or cold-finished | |
| 41251 | I-sections, of iron or non-alloy steel, not prepared for use in structures, not further worked than hot-rolled, hot-drawn or extruded | |
| 41251 | I-sections, of iron or non-alloy steel, not prepared for use in structures, not further worked than hot-rolled, hot-drawn or extruded, of a height of 80 mm or more | |
| 35420 | Isinglass | |
| 34140 | Iso-amyl acetate | |
| 35230 | Isoascorbic acid | |
| 34130 | Isoborneol | |
| 34140 | Isobornyl acetate | |
| 34140 | Isobornyl formate | |
| 33410 | Isobutane, liquefied | |
| 34110 | Isobutane, not less than 95% pure | |
| 33420 | Isobutene, liquefied, less than 95% pure by weight, calculated on the dry product | |
| 34140 | Isobutyl acetate | |
| 34130 | Isobutyl alcohol | |
| 34140 | Isobutyl methacrylate | |
| 34170 | Isobutyl methyl ketone | |
| 34160 | 2-Isobutylquinoline | |
| 34140 | Isobutyric acid and its salts and esters | |
| 34150 | Isocyanates | |
| 34270 | Isocyanates, inorganic, of metals | |
| 34230 | Isocyanic acid | |
| 34150 | Isocyanides | |
| 34140 | Di-isodecyl phthalate | |
| 34170 | Isoeugenol | |
| 34150 | Isoleucine | |
| 34150 | Isomethadone (INN) | |