2849 20 000 0 — Carbides, whether or not chemically defined: of silicon

2849 Carbides, defined or indefinite chemical composition: 2849 10 – calcium 2849 20 – silicon 2849 90 – other

This heading covers: (A) Binary carbides, which are compounds of carbon with elements more electropositive than carbon. Compounds known as acetylides or acetylenides are also classified in this heading. The most well-known binary carbides are (1) calcium carbide (CaC2). In its pure form - a transparent colorless solid, in the presence of impurities - opaque, gray. Decomposes with water to release acetylene; used to produce acetylene or calcium cyanamide. (2) Silicon carbide (SiC) (carbon silicide). It is obtained by processing carbon and silicon in an electric furnace. Black crystals, chunks or shapeless mass, crushed or in grains. Melted with great difficulty; chemically resistant reagent; has some degree of refraction, hard as a diamond, but much more fragile. It is used as an abrasive and as a refractory product; in a mixture with graphite - for lining furnaces or high-temperature furnaces. It is also used for the production of silicon. This heading does not include silicon carbide in the form of powder or grains on a cloth, paper, cardboard or other basis (heading 6805) or in the form of grinding circles, grinding stones for hand sharpening or polishing, etc. (heading 6804). (3) Carbide b ora (borocarbon). Received by processing graphite and boric acid in an electric furnace; black shiny solid crystals. It is used as an abrasive, for drilling rocks, in the production of tools or electrodes. (4) Aluminum carbide (Al4C3). Received in e-ectric ovens when heating aluminum oxide with coke; transparent yellow crystals or flakes. It decomposes with water and releases methane. (5) Zirconium carbide (ZrC). It is obtained in electric furnaces from zirconium oxide and soot; it decomposes upon contact with air and water. It is used in the manufacture of lamps. (6) Barium carbide (BaC2). Usually obtained in electric furnaces; brownish crystal mass. Decomposes with water with the release of acetylene. (7) Tungsten carbides. It is obtained in electric furnaces from metal powder or tungsten oxide and soot; the powder does not decompose with water, has a very high chemical stability. It has a high melting point; very hard and resistant to heating. Its conductivity is similar to that of metals, and it interacts easily with ferrous metals. It is used in solid sintered compositions, for example, in agglomerates for the production of cutting tool tips (usually together with a binder such as cobalt or nickel). (8) Other carbides. Carbides of molybdenum, vanadium, titanium, tantalum or niobium are obtained from metal powders or oxides of these metals and soot in electric furnaces; used for the same purposes as tungsten carbide. There are also carbides of chromium and manganese. (B) Carbides consisting of genus carbon in combination with more than one metal, e.g. (Ti, W)C.

(C) Compounds consisting of one or more metals combined with carbon and another non-metallic element, e.g., aluminium borocarbide, zirconium carbonitride, titanium carbonitride. The proportions of the elements in some of these compounds may not be stoichiometric. However, mechanical mixtures are excluded. The heading further excludes: (a) binary compounds of carbon with the following elements: oxygen (heading 2811), halogens (heading 2812 or 2903), sulphur (heading 2813), precious metals (heading 2843), nitrogen (heading 2853), hydrogen (heading 2901); (b) mixtures of metal carbides, not agglomerated but prepared for making plates, sticks, tips, etc., e.g., for tools (heading 3824); (c) iron-carbon alloys of Chapter 72, such as white pig iron, irrespective of their composition; (d) mixtures of agglomerated metal carbides in the form of plates, sticks, tips and similar articles for tools (heading 8209).

Notes

English text as published in Annex I to Regulation (EU) 2021/1832 (Combined Nomenclature). The EAEU tariff and the EU nomenclature copy these notes from the same convention. For a Russian declaration the binding version is the Russian one: Annex to Decision No 80 of the EEC Council of 14 September 2021.

1. Except where the context otherwise requires, the headings of this chapter apply only to:

(a) separate chemical elements and separate chemically defined compounds, whether or not containing impurities;

(b) the products mentioned in (a) above dissolved in water;

(c) 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;

(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;

(e) the products mentioned in (a), (b), (c) or (d) above with an added anti-dusting 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. In addition to dithionites and sulphoxylates, stabilised with organic substances (heading 2831), carbonates and peroxocarbonates of inorganic bases (heading 2836), cyanides, cyanide oxides and complex cyanides of inorganic bases (heading 2837), fulminates, cyanates and thiocyanates, of inorganic bases (heading 2842), organic products included in headings 2843 to 2846 and 2852 and carbides (heading 2849), only the following compounds of carbon are to be classified in this chapter:

(a) oxides of carbon, hydrogen cyanide and fulminic, isocyanic, thiocyanic and other simple or complex cyanogen acids (heading 2811);

(b) halide oxides of carbon (heading 2812);

(c) carbon disulphide (heading 2813);

(d) thiocarbonates, selenocarbonates, tellurocarbonates, selenocyanates, tellurocyanates, tetrathiocyanatodiamminochromates (reineckates) and other complex cyanates, of inorganic bases (heading 2842);

(e) hydrogen peroxide, solidified with urea (heading 2847), carbon oxysulphide, thiocarbonyl halides, cyanogen, cyanogen halides and cyanamide and its metal derivatives (heading 2853) other than calcium cyanamide, whether or not pure (Chapter 31).

3. Subject to the provisions of note 1 to Section VI, this chapter does not cover:

(a) sodium chloride or magnesium oxide, whether or not pure, or other products of Section V;

(b) organo-inorganic compounds other than those mentioned in note 2 above;

(c) products mentioned in note 2, 3, 4 or 5 to Chapter 31;

(d) inorganic products of a kind used as luminophores, of heading 3206; glass frit and other glass in the form of powder, granules or flakes, of heading 3207;

(e) artificial graphite (heading 3801); products put up as charges for fire-extinguishers or put up in fire-extinguishing grenades, of heading 3813; ink removers put up in packings for retail sale, of heading 3824; cultured crystals (other than optical elements) weighing not less than 2,5 g each, of the halides of the alkali or alkaline-earth metals, of heading 3824;

(f) precious or semi-precious stones (natural, synthetic or reconstructed) or dust or powder of such stones (headings 7102 to 7105), or precious metals or precious-metal alloys of Chapter 71;

(g) the metals, whether or not pure, metal alloys or cermets, including sintered metal carbides (metal carbides sintered with a metal), of Section XV; or

(h) optical elements, for example, of the halides of the alkali or alkaline-earth metals (heading 9001).

4. Chemically defined complex acids consisting of a non-metal acid of sub-chapter II and a metal acid of sub-chapter IV are to be classified in heading 2811.

5. Headings 2826 to 2842 apply only to metal or ammonium salts or peroxysalts. Except where the context otherwise requires, double or complex salts are to be classified in heading 2842.

6. Heading 2844 applies only to:

(a) technetium (atomic No 43), promethium (atomic No 61), polonium (atomic No 84) and all elements with an atomic number greater than 84;

(b) natural or artificial radioactive isotopes (including those of the precious metals or of the base metals of Sections XIV and XV), whether or not mixed together;

(c) compounds, inorganic or organic, of these elements or isotopes, whether or not chemically defined, whether or not mixed together;

(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 74 Bq/g (0,002 μCi/g);

(e) spent (irradiated) fuel elements (cartridges) of nuclear reactors;

(f) radioactive residues whether or not usable. The term ‘isotopes’, for the purposes of this note and of the wording of headings 2844 and 2845, refers to: — individual nuclides, excluding, however, those existing in nature in the monoisotopic state, — 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. Heading 2853 includes copper phosphide (phosphor copper) containing more than 15 % by weight of phosphorus.

8. 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 heading 3818.

Subheading note

Machine translation. The original is the Russian text of the EAEU tariff, and customs goes by it; this translation is for understanding only and has no legal force.

1. В субпозиции 2852 10 термин «определенного химического состава» означает все органические или неорганические соединения ртути, удовлетворяющие требованиям примечаний 1 (а) – 1 (д) к группе 28 и примечаний 1 (а) – 1 (з) к группе 29.

Additional note

Machine translation. The original is the Russian text of the EAEU tariff, and customs goes by it; this translation is for understanding only and has no legal force.

1. Unless otherwise specified, the salts referred to in the subheadings include acid salts and basic salts.