2843.10 | 000 | Colloidal precious metals |
2843.90 | 000 | Other compounds; amalgams |
28.44 | | Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products |
2844.10 | 000 | Natural uranium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing natural uranium or natural uranium compounds |
2844.20 | 000 | Uranium enriched in U 235 and its compounds; plutonium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium enriched in U 235, plutonium or compounds of these products |
2844.30 | 000 | Uranium depleted in U 235 and its compounds; thorium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U 235, thorium or compounds of these products |
2844.40 | | Radioactive elements and isotopes and compounds other than those of subheading 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues |
2844.40 | 010 | - Compounds of fissile isotopes or alloys, dispersions (including cermets), ceramic products and mixtures containing these compounds |
2844.40 | 020 | -- Compounds of radioactive isotopes or alloys, dispersions (including cermets), ceramic products and mixtures containing these compounds |
28.45 | | Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether or not chemically defined |
28.46 | | Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals |
28.49 | | Carbides, whether or not chemically defined |
2849.10 | 000 | Of calcium |
2849.90 | 010 | - Boron carbide, niobium carbide and tantalum carbide |
2850.00 | 000 | Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49 |
28.52 | | Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams |
2852.10 | | Chemically defined |
2852.10 | 100 | 1 Certified reference materials |
2852.10 | 220 | (2) Chemical preparations for photographic uses (other than varnishes, glues, adhesives and similar preparations) ; unmixed products for photographic uses, put up in measured portions or put up for retail sale in a form ready for use |
2852.10 | | (1) Tanning extracts of vegetable origin; tannins and their salts, ethers, esters and other derivatives: |
2852.10 | 920 | (2) Albuminoidal substances and their derivatives, excluding albuminates and other albumin derivatives |
28.53 | | Phosphides, whether or not chemically defined, excluding ferrophosphorus; other inorganic compounds (including distilled or conductivity water and water of similar purity); liquid air (whether or not rare gases have been removed); compressed air; amalgams, other than amalgams of precious metals |
2853.90 | | I.- HYDROCARBONS AND THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES |