2850 00 200 0 — Hydrides and nitrides, whether or not chemically defined (excl. compounds which are also carbides of heading 2849, and inorganic or organic compounds of mercury)

2850 Hydrids, nitrides, azides, silicides and borides, of definite or indefinite chemical composition, except for compounds of heading 2849

Four groups of compounds are classified in this heading, each compound containing two or more elements, one of which is hydrogen, nitrogen, silicon or boron, and the others are metals or nonmetals. The most important hydride is calcium hydride (CaH2) (hydrolite), obtained by the direct interaction of its elements; white mass with crystalline fracture, which decomposes in cold when in contact with water with the release of hydrogen. It is a reducing agent used to produce sintered chromium from chromium chloride. There are also hydrides of arsenic, silicon, boron (including sodium borohydride), lithium (and lithium aluminum), sodium, potassium, strontium, antimony, nickel, titanium, zirconium, tin, lead, etc. This heading does not include compounds of hydrogen with the following elements: oxygen (headings 2201, 2845, 2847 and 2853), nitrogen (headings 2811, 2814 and 2825), phosphorus (heading 28 53), carbon (heading 2901) and certain other non-metals (headings 2806 and 2811). Hydrids of palladium and other precious metals are classified in heading 2843. (B) Nitrides (1) Nonmetal nitrides. Boron nitride (BN) is a light white powder, very refractory. Heat and electrical insulation material; used for lining electric furnaces or for the production of crucibles. Silicon nitride (Si3N4) is a gray-white powder. (2) Metal nitrides. Aluminum, titanium, zirconium, hafnium, vanadium, tantalum or niobium nitrides are obtained either by heating the number of that metal in a nitrogen atmosphere at a temperature of about 1100 °C or 1200 °C, or by heating at a higher temperature a mixture of metal oxide and carbon in a nitrogen or ammonia current. This heading does not include nitrogen compounds with the following elements: oxygen (heading 2811), halogens (heading 2812), sulphur (heading 2813), hydrogen (heading 2814), carbon (heading 2853). The nitrides of silver and other precious metals are classified in heading 2843, the nitrides of thorium and uranium in heading 2844.

(C) AZIDES Metal azides may be regarded as salts of hydrazoic acid (HN3). (1) Sodium azide (NaN3). Obtained by the action of dinitrogen oxide on sodium amide or from hydrazine, ethyl nitrite and sodium hydroxide; colourless crystalline flakes. Soluble in water, it deteriorates slightly in a moist atmosphere. It is strongly affected by the carbon dioxide in the air. Sensitive to impact, like mercury fulminate, but less sensitive to heat than mercury fulminate. Used for preparing initiating explosives for detonators. (2) Lead azide (PbN6). Obtained from sodium azide and lead acetate. A white crystalline powder, very sensitive to impact, which should be stored under water. Used instead of mercury fulminate as an explosive. (D) SILICIDES (1) Calcium silicide. A very hard, grey crystalline mass. Used in metallurgy, for producing hydrogen on site, and in the manufacture of smoke generators. (2) Chromium silicides. There are several chromium silicides; these are very hard substances used as abrasives. (3) Copper silicide (other than the copper-silicon master alloys of heading 7405). Usually in brittle plates. A reducing agent for refining copper, facilitating its melting and increasing its hardness and resistance to fracture; it reduces the susceptibility of copper alloys to corrosion. Also used in the manufacture of silicon bronze or copper-nickel alloys. (4) Magnesium or manganese silicides. The heading excludes compounds of silicon with the following elements: oxygen (heading 28 11), halogens (heading 28 12), sulphur (heading 28 13), phosphorus (heading 2853). Carbon silicide (silicon carbide) falls in heading 2849, silicides of platinum and of other precious metals in heading 28 43, ferro-alloys and copper-based master alloys containing silicon in heading 72 02 or 7405, and silicon-aluminium alloys in Chapter 76. For compounds of silicon and hydrogen, see Part (A) above. (E) BORIDES (1) Calcium boride (CaB6). Obtained by electrolysis of a mixture of calcium borate and calcium chloride; a dark crystalline powder. A powerful reducing agent used in metallurgy. (2) Aluminium boride. Obtained in electric furnaces; a crystalline mass. Used in the manufacture of glass. (3) Borides of titanium, zirconium, vanadium, niobium, tantalum, molybdenum and tungsten are obtained by heating a mixture of the metal powder and pure boron powder in a vacuum at a temperature of 1800 – 2200 °C, or by treating the vaporised metal with boron. The reaction products are very hard and good conductors of electricity. They are used for obtaining hard sintered compositions. (4) Borides of magnesium, antimony, manganese and iron, etc. The heading excludes compounds of boron with the following elements: oxygen (heading 28 10), halogens (heading 28 12), sulphur (heading 28 13), precious metals (heading 28 43), phosphorus (heading 28 53), carbon (heading 28 49). For compounds with hydrogen, nitrogen or silicon, see Parts (A), (B), (D) above. The heading excludes copper-boron master alloys (see the Explanatory Note to heading 7405).

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.