2852 90 00 — Compounds, inorganic or organic, of mercury, whether or not chemically defined, excluding amalgams: other

2852 Mercury compounds, inorganic or organic, chemically defined or undetermined, other than amalgams: 2852 10 chemically defined 2852 90 other

This heading covers inorganic or organic compounds of mercury, whether chemically defined or uncertain, other than amalgams. The most common mercury compounds are listed below: (1) Mercury oxides. Divalent mercury oxide (HgO) is the most important mercury oxide. It can be in the form of a bright red crystalline powder (red oxide) or a denser orange-yellow amorphous powder (yellow oxide). They are used to make paints resistant to seawater, or to produce mercury salts and as catalysts. (2) Mercury chlorides: (a) mercury chloride (I) (calomel) (Hg2Cl2). It can exist as an amorphous mass, powder or as white crystals; it does not dissolve in water. Mercury chloride is also used in pyrotechnics, in the production of porcelain, etc.; (b) mercury chloride (II) (mercury dichloride, sulema) (HgCl2). Crystallizes into vi de prisms or long white needles. It dissolves in water (especially in hot); a strong poison. Extremely strong antiseptic, microbicide and parasiticide; used in the form of very weak solutions. It is used to "bronze" iron, to impregnate wood in the whole of its fire resistance, as an amplifier in photography, as a catalyst in organic chemistry and in the production of mercury oxide. (3) Mercury iodides: (a) mercury iodide (I) (HgI or Hg2I2). Powder, usually amorphous, sometimes crystalline; more often yellow, sometimes green, new or reddish color, moderately soluble in water; very toxic. Used in organic synthesis; (b) mercury iodide (II) (mercury diiodide, red iodide) (HgI 2). Crystalline red powder, almost insoluble in water; very toxic. It is used in photography (as an amplifier) and in laboratory tests. (4) Mercury sulfides. Artificial mercury sulfide (HgS) is a black product. When sublimated or heated with polysulphides of alkali metals, black sulfide turns I into a red powder (red mercury sulfide, artificial cinnabar), is used as a pigment for paints and sulphur. The product obtained by the wet method is more shiny, but not resistant to light. This salt is toxic. Natural mercury sulfide (cinema, natural cinnabar) is excluded (heading 2617). (5) Mercury sulfates: (a) mercury sulfate (I) (Hg2SO4). White crystalline powder, decomposed by water to form basic sulfate. It is used to produce calomel and manufacture standard electrical elements;

mercury sulfate (II) (HgSO4). It is a white anhydrous crystal mass that blackens in light, or hydrated crystal flakes (with one water molecule). It is used to obtain chloride or other salts of divalent mercury, in metallurgy of gold and silver, etc.; (c) trirtuti sulfate dioxide (HgSO4.2HgO) (basic mercury sulfate). (6) Mercury nitrates: (a) mercury nitrate (I) (HgNO3.H2O). Poisonous. Colorless crystals. It is used in the gilding process; in medicine; in the manufacture of felt hats to give a red color to the coat before the rolling process, to obtain mercury acetate (I), etc.; (b) mercury nitrate (II) (Hg(NO3)2). Hydrated salt (usually with two water molecules) Colorless crystals or white, or yellowish plates; in the air it melts, toxic. It is used in the manufacture of hats and in the gilding process. It is also used as an aid for nitration, as a catalyst in organic synthesis, to obtain fulminate or mercury oxide (II), etc.; (c) basic mercury nitrates. (7) Mercury cyanides: (a) mercury cyanide (II) (Hg(CN)2); (b) mercury oxide (II) cyanide (Hg(CN)2.HgO). (8) Cyanomercurates of inorganic bases. Potassium cyanomercurate. Colorless crystals soluble in water are toxic. It is used for silvering mirrors. (9) Mercury fulminate (presumably H g(ONC)2). White or yellowish needle crystals soluble in boiling water are poisonous. It explodes with red smoke. It is supplied in non-metallic vessels filled with water. (10) Mercury thiocyanate (II) (Hg(SCN)2). White crystalline powder, moderately soluble in water. Poisonous salt used in photography to amplify negatives. (11) Mercury arsenates . mercury orthoarsenate (II) (Hg3(AsO4)2). Pale yellow powder, insoluble in water. It is used in non-fouling paints. (12) Double or complex salts: (a) ammonium chloride with mercury (mercury (II) ammonium chloride or ammonium chloromercurate). White crystalline powder, slightly soluble in hot water; toxic. Used in pyrotechnics; (b) copper mercury iodide. Dark red powder, insoluble in water and poisonous. Used in thermoscopy. (13) Mercury aminochloride (HgNH2Cl). White powder, which in light becomes grayish or yellowish; insoluble in water, poisonous. Used in pyrotechnics. (14) Mercury lactate, salt of lactic acid. (15) Organo-inorganic mercury compounds. They may contain one or more mercury atoms, in particular a group (-Hg·X), in which X is an inorganic or organic acid residue: (a) diethyl mercury;

(b) diphenylmercury; (c) phenylmercury acetate. (16) Hydromercuridibromofluorescein. (17) Mercury compounds, not chemically defined (mercury tannates, mercury albuminates, mercury nucleoproteins, etc.). The heading excludes: (a) mercury (heading 2805 or Chapter 30); (b) amalgams of precious metals, amalgams containing both precious metals and base metals (heading 2843), and amalgams wholly of base metal (heading 2853).

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.