Notes.
1.-Ā Except where the context otherwise requires, the headings of this Chapter apply only toĀ :
Ā Ā Ā Ā Ā Ā (a) Separate chemical elements and separate chemically defined compounds, whether or not containing impurities;
Ā Ā Ā Ā Ā Ā (b) The products mentioned in (a) above dissolved in water;
Ā Ā Ā Ā Ā Ā (c)Ā The products mentioned in (a) above dissolved in other solvents provided that the solution constitutes a normal and necessary method of putting up these products adopted solely for reasons of safety or for transport and that the solvent does not render the product particularly suitable for specific use rather than for general use;
Ā Ā Ā Ā Ā Ā (d) The products mentioned in (a), (b) or (c) above with an added stabiliser (including an anti-caking agent) necessary for their preservation or transport;
Ā Ā Ā Ā Ā Ā (e)Ā The products mentioned in (a), (b), (c) or (d) above with an added antiādusting agent or a colouring substance added to facilitate their identification or for safety reasons, provided that the additions do not render the product particularly suitable for specific use rather than for general use.
2.-Ā In addition to dithionites and sulphoxylates, stabilised with organic substances (headingĀ 28.31), carbonates and peroxocarbonates of inorganic bases (headingĀ 28.36), cyanides, cyanide oxides and complex cyanides of inorganic bases (headingĀ 28.37), fulminates, cyanates and thiocyanates, of inorganic bases (headingĀ 28.42), organic products included in headingĀ 28.43 to 28.46 and 28.52 and carbides (headingĀ 28.49), only the following compounds of carbon are to be classified in this ChapterĀ :
Ā Ā Ā Ā Ā Ā (a) Oxides of carbon, hydrogen cyanide and fulminic, isocyanic, thiocyanic and other simple or complex cyanogen acids (headingĀ 28.11);
Ā Ā Ā Ā Ā Ā (b) Halide oxides of carbon (headingĀ 28.12);
Ā Ā Ā Ā Ā Ā (c)Ā Carbon disulphide (headingĀ 28.13);
Ā Ā Ā Ā Ā Ā (d) Thiocarbonates, selenocarbonates, tellurocarbonates, selenocyanates, tellurocyanates, tetrathio- cyanatodiamminochromates (reineckates) and other complex cyanates, of inorganic bases (headingĀ 28.42);
Ā Ā Ā Ā Ā Ā (e)Ā Hydrogen peroxide, solidified with urea (headingĀ 28.47), carbon oxysulphide, thiocarbonyl halides, cyanogen, cyanogen halides and cyanamide and its metal derivatives (headingĀ 28.53) other than calcium cyanamide, whether or not pure (ChapterĀ 31).
3.āĀ Subject to the provisions of NoteĀ 1 to SectionĀ VI, this Chapter does not coverĀ :
Ā Ā Ā Ā Ā Ā (a) Sodium chloride or magnesium oxide, whether or not pure, or other products of SectionĀ V;
Ā Ā Ā Ā Ā Ā (b) Organoāinorganic compounds other than those mentioned in NoteĀ 2 above;
Ā Ā Ā Ā Ā Ā (c)Ā Products mentioned in NoteĀ 2, 3, 4 or 5 to ChapterĀ 31;
Ā Ā Ā Ā Ā Ā (d) Inorganic products of a kind used as luminophores, of headingĀ 32.06; glass frit and other glass in the form of powder, granules or flakes, of headingĀ 32.07;
Ā Ā Ā Ā Ā Ā (e)Ā Artificial graphite (headingĀ 38.01); products put up as charges for fireāextinguishers or put up in fireāextinguishing grenades, of headingĀ 38.13; ink removers put up in packings for retail sale, of headingĀ 38.24; cultured crystals (other than optical elements) weighing not less than 2.5Ā g each, of the halides of the alkali or alkalineāearth metals, of headingĀ 38.24;
Ā Ā Ā Ā Ā Ā (f)Ā Precious or semiāprecious stones (natural, synthetic or reconstructed) or dust or powder of such stones (headingsĀ 71.02 to 71.05), or precious metals or precious metal alloys of ChapterĀ 71;
Ā Ā Ā Ā Ā Ā (g)Ā The metals, whether or not pure, metal alloys or cermets, including sintered metal carbides (metal carbides sintered with a metal), of SectionĀ XV; or
Ā Ā Ā Ā Ā Ā (h) Optical elements, for example, of the halides of the alkali or alkalineāearth metals (headingĀ 90.01).
4.āĀ Chemically defined complex acids consisting of a nonāmetal acid of subāChapterĀ II and a metal acid of subāChapterĀ IV are to be classified in headingĀ 28.11.
5.āĀ HeadingsĀ 28.26 to 28.42 apply only to metal or ammonium salts or peroxysalts.
Ā Ā Ā Ā Ā Ā Except where the context otherwise requires, double or complex salts are to be classified in headingĀ 28.42.
6.āĀ HeadingĀ 28.44 applies only toĀ :
Ā Ā Ā Ā Ā Ā (a) Technetium (atomic No.Ā 43), promethium (atomic No.Ā 61), polonium (atomic No.Ā 84) and all elements with an atomic number greater than84;
Ā Ā Ā Ā Ā Ā (b) Natural or artificial radioactive isotopes (including those of the precious metals or of the base metals of SectionsĀ XIV and XV), whether or not mixed together;
Ā Ā Ā Ā Ā Ā (c)Ā Compounds, inorganic or organic, of these elements or isotopes, whether or not chemically defined, whether or not mixed together;
Ā Ā Ā Ā Ā Ā (d) Alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or isotopes or inorganic or organic compounds thereof and having a specific radioactivity exceeding 74Ā Bq/g (0.002Ā Ī¼Ci/g);
Ā Ā Ā Ā Ā Ā (e)Ā Spent (irradiated) fuel elements (cartridges) of nuclear reactors;
Ā Ā Ā Ā Ā Ā (f)Ā Radioactive residues whether or not usable.
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā The term āisotopesā, for the purposes of this Note and of the wording of headingsĀ 28.44 and 28.45, refers toĀ :
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā āĀ Ā individual nuclides, excluding, however, those existing in nature in the monoisotopic state;
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā āĀ Ā mixtures of isotopes of one and the same element, enriched in one or several of the said isotopes, that is, elements of which the natural isotopic composition has been artificially modified.
7.āĀ HeadingĀ 28.53 includes copper phosphide (phosphor copper) containing more than 15Ā % by weight of phosphorus.
8.āĀ Chemical elements (for example, silicon and selenium) doped for use in electronics are to be classified in this Chapter, provided that they are in forms unworked as drawn, or in the form of cylinders or rods. When cut in the form of discs, wafers or similar forms, they fall in headingĀ 38.18.
Subheading Note.
1.-Ā For the purposes of subheadingĀ 2852.10, the expression āchemically definedā means all organic or inorganic compounds of mercury meeting the requirements of paragraphsĀ (a) to (e) of NoteĀ 1 to ChapterĀ 28 or paragraphsĀ (a) to (h) of NoteĀ 1 to ChapterĀ 29.
