2842 90 100 0 — Salts, double salts or complex salts of selenium or tellurium acids

2842 Salts of inorganic acids or peroxoacids (including aluminosilicates of certain or undetermined chemical composition), other than azides, other: 2842 10 - double or complex silicates, including aluminosilicates of certain or undetermined chemical composition 2842 90 - other

Subject to the exclusions mentioned in the General Explanatory Note to this sub-Chapter, this heading covers: (I) SALTS OF INORGANIC ACIDS OR PEROXOACIDS OF NON-METALS, NOT ELSEWHERE SPECIFIED Examples of such salts include: (A) Fulminates, cyanates, isocyanates and thiocyanates, which are metal salts of cyanic acid (HO-CN), not isolated in the free state, or of isocyanic acid (HN=C=O), or of fulminic acid (H-C≡N+-O-), another isomer of cyanic acid, or of thiocyanic acid (HS-CN). (1) Fulminates. Fulminates are compounds of more or less uncertain composition, very unstable, exploding on slight impact or on exposure to heat (e.g., from a spark). They are constituents of explosives and are used for the manufacture of percussion caps or detonators. (2) Cyanates. Ammonium, sodium or potassium cyanates are used for the preparation of various organic compounds. There are also cyanates of the alkaline-earth metals. (3) Thiocyanates. Thiocyanates (sulphocyanides) are salts of thiocyanic acid (HS-C≡N), not isolated in the free state. The most important are: (a) Ammonium thiocyanate (NH4SCN). Colourless crystals, deliquescent, very soluble in water, turning red in light and in air, decomposing on heating. Used in electroplating; in photography; in dyeing or printing (in particular for preserving the properties of silk fabrics); for preparing freezing mixtures, for obtaining

cyanides or hexacyanoferrates (II), thiourea, guanidine, plastics, adhesives, herbicides, etc.; (b) Sodium thiocyanate (NaSCN). Similar in appearance to ammonium thiocyanate, or it may exist in the form of a powder. Poisonous. Used in photography; in dyeing and printing (mordant); in medicine; as a laboratory reagent; in electroplating; for preparing artificial mustard oil; in the rubber industry, etc.; (c) Potassium thiocyanate (KSCN). Has the same characteristics as sodium thiocyanate. Used in the textile industry; in photography; in organic synthesis (e.g., for obtaining thiourea, artificial mustard oil and colouring matter), for obtaining thiocyanates, freezing mixtures, as a parasiticide, etc.; (d) Calcium thiocyanate (Ca(SCN)2·3H2O). Colourless crystals, deliquescent and soluble in water. Used as a mordant in dyeing or printing; as a solvent for cellulose; for mercerising cotton; in medicine instead of potassium iodide (for the treatment of arteriosclerosis); for obtaining hexacyanoferrates (II) or other thiocyanates; in the manufacture of parchment; (e) Copper thiocyanates. Cuprous thiocyanate (CuSCN), a whitish, greyish or yellowish powder or paste; insoluble in water. Used as a mordant in printing textile materials, for making paints resistant to sea water, and in organic synthesis. Cupric thiocyanate (Cu(SCN)2), a black powder, insoluble in water; readily converted into cuprous thiocyanate. Used for preparing percussion caps and matches. Mercury fulminate and mercury (II) thiocyanate are excluded (heading 2852). (B) Arsenites and arsenates. These are metal salts of arsenic-containing acids; arsenites are salts of arsenious acid, arsenates are salts of arsenic acid (heading 28 11). They are highly poisonous. For example: (1) Sodium arsenite (NaAsO2). Obtained by fusing sodium carbonate with arsenic trioxide. White or greyish ingots or powder, soluble in water. Used in viticulture (insecticide); for preserving skins; in medicine; in the manufacture of soap and antiseptics, etc.; (2) Calcium hydrogenarsenite, or calcium arsenite (CaHAsO3). A white powder, insoluble in water, used as an insecticide; (3) Copper hydrogenarsenite, or copper arsenite (CuHAsO3). Obtained from sodium arsenite and copper sulphate. A green powder, insoluble in water. Used as an insecticide, as a colouring matter known as "Scheele's green", and for obtaining certain green pigments (see the Explanatory Note to heading 3206); (4) Zinc arsenite (Zn(AsO2)2). Similar in appearance and use to calcium arsenite; (5) Lead arsenite (Pb(AsO2)2). A white powder, moderately soluble in water. Used in viticulture (insecticide);

(6) Sodium arsenates (ortho-, meta-, and pyroarsenates). The most important of these are disodium hydrogenarsenate, or sodium acid orthoarsenate (Na 2NAsO4) (with 7 or 12 water molecules according to the crystallization temperature), and trisodium orthoarsenate (anhydrous or with 12 molecules per day). It is obtained from arsenic (III) oxide and sodium nitrate. Colorless crystals or greenish powder. It is used in the preparation of medicines (Pearson solution), antiseptics, insecticides and other arsenates; it is also used in the printing of textile materials; (7) potassium arsenates. Mono- and di-primary potassium orthoarsenates are obtained in the same way as sodium arsenates. Colorless crystals soluble in water. Used as antiseptics or insecticides; in tanning production; in printing textile materials, etc.; (8) calcium arsenates. tricalcium diortoarsenate (Ca 3(AsO4)2), often contains impurities of other calcium arsenates. It is obtained by the interaction of calcium chloride and sodium arsenate. White powder, not soluble in water. Used in agriculture as an insecticide; (9) copper arsenates. orthoarsenate of divalent copper (Cu 3(AsO4)2). It is obtained from sodium orthoarsenate and copper sulfate (or chloride). Green powder, not soluble in water. It is used as a means to combat parasites in viticulture and in the production of paints that protect against fouling; (10) lead arsenates. Tris lead diortoarsenate (Pb 3(AsO4)2) and acidic orthoarsenate. Poorly soluble in water. White powder, paste or emulsion. Used in the manufacture of insecticides; (11) other arsenates. These include aluminum arsenates (insecticide) or cobalt (pink powder used in ceramics). This heading does not cover: (a) natural nickel arsenates (e.g. annabergite, etc.) (heading 2530); (b) arsenides (heading 2853); (c) acetoarsenites (group 29). (C) Salts of selenic acids: selenides, selenites, selenates. These include: (1) cadmium selenide. Used in the production of anti-reflective glasses and pigments; (2) sodium selenite. Used to give the glass a reddish hue or to mask a greenish hue of glass; (3) ammonium and sodium selenates. Used as insecticides; sodium salt is also used in medicine; (4) potassium selenate. It's used in photography. Zorgite, natural copper lead selenide, is excluded (heading 2530). (D) Telluric acid salts: tellurides, tellurites, tellurates. These include: (1) bismuth telluride. Semiconductor for thermocells; (2) sodium or potassium tellurates. They're used in medicine. (II) Twin or complex salts This includes double or complex salts other than those of other headings.

The basic double or complex salts falling within this heading include: (A) Double or complex chlorides (chlorosols). (1) Ammonium chloride with: (a) magnesium. Flush crystals; used in soldering; (b) iron (iron ammonium chloride (II) and iron ammonium chloride (III)). Dense substance or hygroscopic crystals; used in galvanic coating and in medicine; (c) Nickel. Yellow powder or hydrated green crystals. Used as an herb in galvanostegia; (d) copper (copper ammonium chloride) . Blue or greenish crystals soluble in water. Used as a staining agent in pyrotechnics; (e) zinc (zinc ammonium chloride). White crystalline powder soluble in water. Used in soldering (" soldering salts"), in dry electric batteries and in galvanostegia (galvanic coating with zinc); (e) with tin. In particular, ammonium chlorostanate; exists as white or pink crystals or in an aqueous solution. Sometimes called "pink salt"; used in dyeing or as a binder for silk; (2) Sodium chloride with aluminum. White crystalline, hygroscopic powder. Used in tanning. (3) Calcium chloride with magnesium . . . White floating crystals. It is used in paper, textile, starch and grouse production or paint industry. (4) Chlorosols, e.g. chlorobromides, chloroiodides, chlorophosphates, chlorochromates and chlorovanadates. These include potassium chlorochromate (peligoth salt). Red crystals decomposing in water. It is an oxidant used in organic synthesis. Pyromorphite (phosphate and lead chloride) and vanadinite (vanadate and lead chloride) are not included as they are natural metal ores of headings 2607 and 2615, respectively. (B) Double or complex iodides (iodosols). (1) Sodium bismuth iodide. Red crystals decomposed by water. It's used in medicine. (2) Potassium cadmium iodide: A white, loose powder that turns yellow when kept in air. It is also used in medicine. (B) Double or complex salts containing sulfur (thiosols). (1) Ammonium sulfate with: (a) iron (iron (II) ammonium sulfate, Mora salt) (FeSO4·(NH4)2SO4·6H2O). Light green crystals soluble in water. Used in metallurgy and medicine; (b) cobalt (CoSO4·(NNN4)2SO4·6H2O). Red crystals soluble in water. Used in electrodeposition of cobalt and in ceramics;

(c) with nickel (NiSO4·(NH4)2SO4·6H2O). Green crystals which decompose on heating; readily soluble in water. Used mainly for the electrodeposition of nickel; (d) with copper. A blue crystalline powder, soluble in water and efflorescing in air. Used as a parasiticide, in the printing and finishing of textile materials, for the preparation of copper arsenite, etc. (2) Sodium zirconium sulphate. A white solid. Used in the metallurgy of zinc. (3) "Thiosalts" and other double or complex salts containing sulphur, e.g., selenosulphides and selenosulphates, thiotellurates, thioarsenates, thioarsenites and arsenosulphides, thiocarbonates, germanosulphides, thioantimonates, thiomolybdates, thiostannates, reineckates. These include: (a) Potassium trithiocarbonate. Yellow crystals, soluble in water. Used in agriculture (against phylloxera) and in chemical analysis; (b) Alkali metal thiomolybdates. Used as accelerating agents in the phosphating (parkerising) of metals in baths; (c) Ammonium tetrathiocyanatodiamminechromate (ammonium diamminetetrakisthiocyanatochromate, ammonium reineckate or Reinecke's salt) (NH4[Cr(NH3)2(SCN)4]·H2O). A crystalline powder or dark red crystals. Used as a reagent; (d) Potassium iron (II) thiocyanate and potassium iron (III) thiocyanate. The heading excludes cobaltite (cobalt sulphide and arsenide) and germanite (copper germanosulphide), which are natural ores of headings 2605 and 2617, respectively. (D) Double or complex salts of selenium (selenocarbonates, selenocyanates, etc.). (E) Double or complex salts of tellurium (tellurocarbonates, tellurocyanates, etc.). (F) Cobaltinitrites (nitrocobaltates). Potassium cobaltinitrite (potassium cobalt nitrite, Fischer's yellow) (K3Co(NO2)6). A microcrystalline powder, readily soluble in water. A pigment known, in the pure state or mixed, as cobalt yellow. (G) Double or complex nitrates (tetra- and hexaamminenickel nitrates). Ammoniacal nickel nitrates. Blue or green water-soluble crystals. Used as oxidising agents and for the preparation of pure nickel catalyst. (H) Double or complex phosphates (phosphosalts). (1) Sodium ammonium hydrogenphosphate, or sodium ammonium orthophosphate (NaNH4HPO4·4H2O). Colourless efflorescent crystals, soluble in water. Used as a flux for dissolving metal oxides. (2) Ammonium magnesium phosphate, or ammonium magnesium orthophosphate. A white powder, very slightly soluble in water. Used in the manufacture of fireproof textile materials and in medicine. (3) Complex salts containing phosphorus, e.g., molybdophosphates, silicophosphates, tungstophosphates, stannophosphates.

These include: (a) Molybdophosphates. Used in microscopy; (b) Silicophosphates and stannophosphates. Used for sizing silk. (IJ) Tungstoborates (borotungstates). Cadmium borotungstate exists as yellow crystals or in aqueous solution. Used for separating minerals according to their densities. (K) Double or complex cyanates. (L) Double or complex silicates. These include aluminosilicates, whether or not separate chemically defined compounds. Aluminosilicates are used in the glass industry and as insulators, ion exchangers, catalysts, molecular sieves, etc. This category includes synthetic zeolites of the general formula M2/nO·Al2O3·ySiO2·wH2O, where M is a cation of valency n (usually sodium, potassium, magnesium or calcium), y ≥ 2 and w is the number of water molecules. However, aluminosilicates containing binders (e.g., zeolites containing clays based on silicon dioxide) are excluded (heading 3824). Particle size (usually above 5 microns) can generally be used to identify zeolites containing binders. (M) Double or complex salts of metal oxides. These are salts such as potassium calcium chromate. The heading excludes: (a) complex fluorine salts (heading 2826); (b) alums (heading 2833); (c) complex cyanides (heading 2837); (d) salts of hydrazoic acid (azides) (heading 2850); (e) mercury ammonium chloride (ammonium mercury chloride, or ammonium chloromercurate) and copper mercury iodide (heading 2852); (f) potassium magnesium sulphate, pure or impure (Chapter 31). Sub-Chapter VI MISCELLANEOUS INORGANIC PRODUCTS

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.