2826 19 100 0 — Fluorides of ammonium or of sodium

2826 Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts: - fluoride: 2826 12 - - aluminum 2826 19 - - - other 2826 30 - sodium hexafluoroaluminate (synthetic cryolite) 2826 90 - other

(A) FLUORIDES Subject to the exclusions mentioned in the General Explanatory Note to this sub-Chapter, this heading covers fluorides (i.e., metal salts of hydrofluoric acid of heading 2811). The most important fluorides include: (1) Ammonium fluorides: the neutral fluoride (NH4F) and the acid fluoride (NH4F·HF). These are deliquescent, colourless, toxic crystals, soluble in water. They are used as antiseptics (for preserving hides and wood), for controlling fermentation (instead of hydrofluoric acid); in dyeing (as a mordant), for etching glass (mainly the acid fluoride), for cleaning copper, in metallurgy (for opening up ores, obtaining platinum), etc. (2) Sodium fluorides: the neutral fluoride (NaF) and the acid fluoride (NaF·HF). Obtained by calcining natural calcium fluoride of heading 2529 (fluorspar or fluorite) with a sodium salt. Colourless crystals, sparingly soluble in water; toxic. Like the ammonium fluorides, they are used as antiseptics (for preserving hides, wood, eggs), for controlling fermentation, and for etching glass to give it a matt surface. They are also used in the manufacture of vitrifiable enamels or of pesticides. (3) Aluminium fluoride (AlF3). Obtained from bauxite and hydrofluoric acid. Colourless crystals, insoluble in water. Used as a flux in the manufacture of enamels or ceramics and for purifying hydrogen peroxide. (4) Potassium fluorides. Neutral potassium fluoride (KF·2H2O) consists of colourless, deliquescent, toxic crystals, very soluble in water. There is also an acid fluoride (KF·HF). Its uses are the same as those of sodium fluorides. In addition, the acid fluoride is used in the metallurgy of zirconium or tantalum. (5) Calcium fluoride (CaF2). Obtained from natural calcium fluoride (fluorite, fluorspar) of heading 2529. Colourless crystals, insoluble in water. It may be in the gelatinous state. Used as a flux in metallurgy (in particular in the electrolytic production of magnesium from carnallite) and in the manufacture of glass or ceramics.

(6) Chromium trifluoride (CrF3·4H2O). Dark green powder, soluble in water. In aqueous solution, glass corrodes. It is used as a stain when dyeing. (7) Zinc fluoride (ZnF2). White powder, not soluble in water. It is used for impregnation of wood, in the manufacture of enamels and in galvanostegia. (8) Antimony fluorides .The action of hydrofluoric acid on antimony oxides produces antimony trifluoride (SbF 3), which crystallizes as floating white needles soluble in water, and antimony pentafluoride (SbF 5), a viscous liquid dissolved in water with a hissing sound to form hydrate (with two water molecules). These salts are used in the production of ceramics and as an etching in dyeing or printing textile materials. (9) Barium fluoride (BaF2). Received by the action of hydrofluoric acid on oxide, sulfide or barium carbonate. White powder, moderately soluble in water; toxic en. It is used as a pigment in the manufacture of ceramics or enamels, as an antiseptic for embalming, as an insecticide, etc. This heading does not cover non-metal fluorides (heading 2812). (B) Fluorosilicates are salts of hexafluorosilic acid (H2SiF6) of heading 2811. (1) Hexafluorosilicate disodium (sodium fluorosilicate) (Na 2SiF6). It is obtained from silicon fluoride, which is a byproduct of the production of superphosphates. White powder, moderately soluble in cold water. It is used for the manufacture of opaque glass and enamels, artificial stones, acid-resistant cement, rat poison, insecticides; it is also used for electrolytic extraction of beryllium; electrolytic refining of tin; latex coagulation; as an antiseptic. (2) Hexafluorosilicate dicalium (potassium fluorosilicate) (K 2SiF6). White crystalline powder odorless, poorly soluble in water, dissolves in hydrochloric acid. Used for the preparation of vitreous enamel fritta, ceramics, insecticides, synthetic mica; used in metallurgy of aluminum and magnesium. (3) Calcium hexafluorosilicate (calcium fluorosilicate) (CaSiF 6). White crystalline powder, poorly soluble in water; used as a white pigment in the production of ceramics. (4) Copper hexafluorosilicate (copper fluorosilicate) (CuSiF 6·6H2O). Blue crystalline powder, soluble in water, is toxic. It is used to obtain a motley color and as a fungicide. (5) Zinc hexafluorosilicate (zinc fluorosilicate) (ZnSiF 6·6H2O). Crystalline powder soluble in water; reacts with calcium compounds to form a layer of calcium fluoride. It is used to harden concrete, galvanic zinc deposition, as an antiseptic or fungicide (when wood is infected). (6) Barium hexafluorosilicate (barium fluorosilicate) (BaSiF6). White powder. It is used in the fight against the Colorado beetle and other insects, as well as to destroy harmful animals. (7) Other fluorosilicates. Magnesium fluorosilicates and aluminum; like zinc fluorosilicate, are used to harden concrete. Chromium and iron fluorosilicates are used to make dyes.

This heading does not cover topaz, natural aluminium fluorosilicate (Chapter 71). (C) Fluoroaluminates and other complex salts of fluoride (1) Hexafluoroaluminate trisodium (sodium hexafluoroaluminate) (Na 3AlF6), synthetic cryolite obtained as a precipitate by mixing aluminum oxide dissolved in hydrofluoric acid with sodium chloride or melting aluminum sulfate with sodium fluoride. It is a whitish crystalline mass. Used as a substitute for natural cryolite (heading 2530) in aluminum metallurgy, in pyrotechnics, in the manufacture of enamel and glass, or as an insecticide. (2) Fluoroborates. Sodium fluoroborate (disinfectant), potassium fluoroborate (used in the production of enamel), chromium and nickel fluoroborates (used for electroplating), etc. (3) Fluorosulfates. Of greatest interest is antimony ammonium fluorosulphate ((NH4)2SO4SbF3) or "gene salt"; soluble crystals that corrode glass and metal. It is used as a stain when dyeing. (4) Fluorophosphates obtained, for example, from natural magnesium fluorophosphate (heading 2530) or lithium aluminium fluorophosphate (ambligonite) (heading 2530). (5) Fluorotantalates (produced in tantalum metallurgy); fluorotitanates, fluorohermanates, fluoroniobats, fluorocirconates (produced in zirconium metallurgy), fluorosanthates, etc. This heading covers metal fluoride oxide (beryllium and others) and complex oxide fluoride salts, but nonmetal fluoride oxide is excluded (heading 2812). Fluoroformates, fluoroacetates or other organic fluorine-containing salts are also excluded (Chapter 29).

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.