2812 15 — Sulphur monochloride

2812 Nonmetal oxide halogenides and halide: – chlorides and chloride chloride: 2812 11 – – carbonyl dichloride (phosgene) 2812 12 – phosphorus oxychloride 2812 13 – phosphorus trichloride 2812 14 – pentachloride phosphorus 2812 15 – sulfur monochloride 2812 16 – sulfur dichloride 2812 17 – thionyl chloride 2812 19 – other 2812 90 – others

(A) CHLORIDES OF NON-METALS The most important of these binary compounds are: (1) Iodine chlorides: (a) iodine chloride (ICl) is obtained by the direct action of chlorine on iodine. Above 27 °C it is a dark brown liquid; at lower temperatures it takes the form of reddish crystals. Specific gravity about 3.0. It is decomposed by water; it causes severe burns to the skin. Used in organic synthesis as an iodinating agent; (b) iodine trichloride (ICl3). Obtained in the same way as iodine chloride, or from hydriodic acid. It is in the form of yellow needle-shaped crystals, soluble in water. Specific gravity about 3.0. Used for the same purposes as iodine chloride, and also in medicine. (2) Sulphur chlorides: (a) sulphur monochloride (S2Cl2) (also called "disulphur dichloride", the name being based on the structural formula Cl-S-S-Cl). Obtained by the action of chlorine on sulphur. This is the commercial sulphur chloride; it is a yellow or reddish liquid which gives off fumes with a suffocating odour in air; it is decomposed by water. Specific gravity about 1.7. As a solvent for sulphur, it is used for the cold vulcanisation of rubber or gutta-percha. (b) sulphur dichloride (SCl2). Obtained from sulphur monochloride. It is a reddish-brown liquid; it is also decomposed by water; it is a rather unstable compound. Specific gravity about 1.6. Used for the cold vulcanisation of rubber and as a chlorinating agent in the manufacture of synthetic dyes (in particular, thioindigo). (3) Phosphorus chlorides: (a) phosphorus trichloride (PCl3). Obtained by the direct action of chlorine on phosphorus. It is a colourless liquid, specific gravity about 1.6, corrosive, with an irritating odour, and lachrymatory. In moist air it "fumes", and it is decomposed by water. Used mainly as a chlorinating agent in organic synthesis (e.g., manufacture of acid chlorides, dyes, etc.), and also in the ceramics industry for obtaining a lustrous surface; (b) phosphorus pentachloride (PCl5). Obtained from phosphorus trichloride as white or yellowish crystals. Specific gravity about 3.6. Like phosphorus trichloride, it "fumes" in moist air, is decomposed by water and is lachrymatory. Used in organic chemistry as a chlorinating agent or catalyst (e.g., in the preparation of isatin chloride). Phosphonium chloride (PH4Cl) is excluded (heading 2853). (4) Arsenic chlorides. Arsenic trichloride (AsCl3). Obtained by the action of chlorine on arsenic or of hydrochloric acid on arsenic trioxide. It is a colourless oily liquid. It "fumes" in moist air; very toxic. (5) Silicon chlorides. Silicon tetrachloride (SiCl4). Obtained by the action of chlorine gas on a mixture of silicon dioxide and carbon, or on silicon itself, silicon bronze or ferrosilicon. A colourless

liquid, the specific gravity is about 1.5. In the presence of atmospheric moisture, it emits suffocating white vapors (hydrogen chloride (HCl)). It decomposes in water with the formation of gelatinous silica and the release of HCl vapors. It is used to obtain silica, high-purity silicon, organosilicon compounds and smoke screens. Hydrogen silicide substitution products such as trichlorosylane (SiHCl 3) are not included in this heading (heading 2853). This heading does not include carbon tetrachloride (CCl4), hexachloroethane (carbon hexachloride) (C2Cl6), hexachlorobenzene (ISO) (C6Cl6), octachloronaphthalene (C10Cl8) and similar carbon chlorides; they are chlorinated hydrocarbon derivatives (heading 2903).

These triple compounds include, inter alia: (1) Sulfur chloride oxide: (a) thionyl chloride (sulphur dichloride, sulfur chloride) (SOCl 2). Receive oxidation of sulfur dichloride or sulfur trioxide, or sulfuryl chloride. Colorless liquid, specific gravity about 1.7. It emits suffocating fumes, decomposes under the influence of water. It is used in the production of organic chlorides. (b) sulfur dioxide dichloride (sulfonyl chloride, sulfuryl l chloride) (“dichlorosulfonic acid”) (SO 2Cl2). Produced by the action of chlorine on sulfur dioxide or in sunlight, or in the presence of a catalyst (camphorus or activated carbon). Colorless liquid, specific gravity about 1.7. "Smoke" in the air; decomposes under the action of water, causes corrosion. It is used as a chlorinating and sulfonating agent in organic synthesis, for example, in the production of acid chloride. This heading excludes chlorosulfonic acid (“chlorohydrin sulfon it”) (ClSO 2·OH) (heading 2806). (2) Selenium oxide dichloride. Selenium dichloride oxide, commonly called selenyl chloride (SeOCl 2), is similar to thionyl chloride. It turns out when the action of selenium tetrachloride on selenium dioxide. At temperatures above 10 °C, it is a yellow liquid that smokes in the air; at lower temperatures it forms colorless crystals; the relative density is about 2.4. Decomposes with water. It is used in organic synthesis or to decarbonize the cylinders of internal combustion engines. (3) Nitrosyl chloride (nitrogen oxide) (NOCl). Orange-yellow gas with a suffocating odor, toxic, is used as an oxidizer. (4) Phosphorus oxychloride (phosphorus trichloride oxide, phosphoryl chloride) (POCl3). It is obtained from phosphorus trichloride when interacting with potassium chlorate, from phosphorus pentachloride when interacting with boric acid or the action of carbonyl chloride on tricalcium phosphate. A colorless liquid. The specific gravity is about 1.7. It has an irritating smell, "smokes" in moist air, decomposes with water. It is used as a chlorinating agent in organic synthesis, as well as in the production of acetic anhydride or chlorosulfonic acid. (5) Carbonyl dichloride (phosgene, carbon chloride, carbonyl chloride) (COCl2).

Obtained by the action of chlorine on carbon monoxide in the presence of animal black or charcoal, or by the action of oleum on carbon tetrachloride. A colourless product, liquid up to 8 °C and gaseous above that temperature; it is stored in liquid form or under pressure in heavy steel containers. When dissolved in toluene or benzene, it falls in heading 3824. A lachrymatory and very toxic substance. As a chlorinating agent it is widely used in organic synthesis (e.g., in the manufacture of acid chlorides, amino derivatives, Michler's ketone and intermediates for organic dyes). (C) OTHER HALIDES AND HALIDE OXIDES OF NON-METALS This group covers all other halides of non-metals (fluorides, bromides, iodides). (1) Fluorides: (a) iodine pentafluoride (IF5), a fuming liquid; (b) phosphorus fluorides and silicon fluorides; (c) boron trifluoride (BF3). Obtained by heating natural calcium fluoride and powdered boron oxide in the presence of sulphuric acid. A colourless gas. It "fumes" in moist air; it chars organic substances. It absorbs water strongly, forming fluoroboric acid. Used as a dehydrating agent and as a catalyst in organic synthesis. It forms adducts with organic substances (e.g., with diethyl ether, acetic acid or phenol); these compounds, which are also used as catalysts, fall in heading 2942. (2) Bromides: (a) iodine bromide (iodine monobromide) (IBr). Obtained by direct reaction between the components of the compound. It is a blackish-red crystalline mass resembling iodine. Soluble in water. Used in organic synthesis; (b) phosphorus bromides. Phosphorus tribromide (PBr3). Obtained by the action of bromine on phosphorus dissolved in carbon disulphide. A colourless liquid. It "fumes" in moist air and is decomposed by water. Specific gravity about 2.8. Used in organic synthesis. This heading excludes phosphonium bromide (PH4Br) (heading 2853) and carbon bromides (heading 2903). (3) Iodides: (a) phosphorus iodides. Phosphorus diiodide (P2I4). Formed by reaction between iodine and phosphorus dissolved in carbon disulphide. It is in the form of orange crystals giving off coloured vapours. Phosphorus triiodide (PI3). Obtained in a similar way; it crystallises as dark red platelets. Phosphonium iodide (PH4I) falls in heading 2853; (b) arsenic iodides.

Arsenic triiodide (AsI3). Red crystals are derived from the constituent elements. Toxic volatile substance. Used in medicine or as a reagent in laboratory studies; (c) compounds of iodine with other halogens. See above paragraphs (A)(1), (C)(1)(a), (C)(2)(a). (4) Oxide halide other than chloride oxide: (a) fluoride oxide, for example, phosphorus trifluoride (phosphoryl fluoride) (POF3); (b) oxide bromide, for example, sulfur oxide dibromide (thionyl bromide) (SOBr 2), orange-colored liquid, phosphorus tribromide (phosphoryl bromide) (POBr 3), having the form of plate crystals; (c) iodide oxide.

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.