|
| 515.75 | Isoquinoline | |
| 515.69 | Isosafrole | |
| 515.49 | Isothiocyanates | |
| 525.19 | Isotopes, enriched (radioactive) | |
| 525.19 | Isotopes, radioactive, natural or artificial (excl. chemical elements occurring naturally in the monoisotopic state, e.g., beryllium 9), and their compounds | |
| 525.19 | Isotopes, radioactive, of precious metals | |
| 525.91 | Isotopes, stable, pure (excl. chemical isotopes occurring in nature as pure isotopes), and any of their compounds | |
| 513.75 | Isovaleric acid and its salts and esters | |
| 265.41 | Istle (or ixtle) textile fibres, raw | |
| 265.49 | Istle (or ixtle) textile fibres, tow or waste of, whether or not processed but not spun | |
| 292.93 | Istle, not prepared for textile use | |
| 598.65 | Ivory black | |
| 899.11 | Ivory, animal, worked beyond cleaning, simple sawing, cutting (crosswise or lengthwise) and rough planing | |
| 291.16 | Ivory, cut crosswise or lengthwise (excl. cut to shape) | |
| 291.16 | Ivory, simply sawn to remove useless parts | |
| 291.16 | Ivory, unworked or not further worked than simply prepared (excl. cut to shape) | |
| 292.99 | Ivory, vegetable, whole or sliced but not otherwise worked | |
| 899.19 | Ivory, vegetable, worked or moulded (excl. buttons and blanks therefor) | |
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