Containing polychlorinated biphenyls (PCBs),

38.24 - Pre ared binders for foundry moulds or cores; chemical products and preparations oft e chemical or allied industries (includin those consisting of mixtures of natural products), not elsewhere specified or include (+). ! a 3824.10 - Prepared binders for foundry moulds or cores 3824.30 - Non-agglomerated metal carbides mixed together or with metallic binders - Prepared additives for cements, mortars or concretes 3824.50 - Non-refractory mortars and concretes 3824.60 - Sorbitol other than that of subheading 2905.44 3824.40 - Mixtures containing halogenated derivatives of methane, ethane or propane : 3824.71 - - Containing cblorofluorocarbons (CFCs), whether or not containing 3824.72 - - Containing bromochlorodifluoromethane, bromotrifluoromethane or hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs) perfluorocarbons (PFCs) or dibromotetrafluoroethanes - - Containing hydrobromofluorocarbons(HBFCs) 3824.74 - - Containing hydrochlorofluorocarbons (HCFCs), whether or not containing 3824.73 perfluorocarbons (PFCs) or hydrofluorocarbons (HFCs), but not containing chlorofluorocarbons (CFCs) - - Containing carbon tetrachloride 3824.76 - - Containing 1,l,l-trichloroethane (methyl chloroform) 3824.77 - - Containing bromomethane (methyl bromide) or bromochloromethane 3824.78 - - Containing perfluorocarbons (PFCs) or hydrofluorocarbons (HFCs), but 3824.75 not contaming chlorofluorocasbons (CFCs) or hydrochlorofluorocarbons (HCFCs) 3824.79 - - Other - Mixtures and nrmarations containing oxirane (ethvlene oxide), polybrominated 6i 6enyls (PBBs), polfchlorinated Ijiphknyls (PCBs); polychlorinated terp enyls (PCTs) or trrs(2,3-dibromopropyl) phosphate : i - - Containing oxirane (ethylene oxide) 3824.82 - - Containing pol chlorinated biphenyls (PCBs), polychlorinated terphenyls 3824.8 1 (lC ' Ts) g or poly rominated biphenyls (PBBs) 3824.83 - - Containing tris(2,3-dibromopropyl) phosphate 3824.90 - Other This heading covers : (A) PREPARED BINDERS FOR FOUNDRY MOULDS OR CORES The heading covers foundry core binders based on natural resinous products (e.g., rosin), linseed oil, vegetable mucilages, dextrin, molasses, polymers of Chapter 39, etc. These are preparations for mixin with foundry sand to give it a consistency suitable for use in foundry moulds or cores, and to acilitate the removal of the sand after the piece has been cast. ? However, dextrins and other modified starches, and glues based on starches or on dextrins or other modified starches are classified in heading 35.05. (B) CHEMICAL PRODUCTS AND CHEMICAL OR OTHER PREPARATIONS With only three exceptions (see para aphs (7), (19) and (32) below), this heading does not apply to separate chemically defined e ements or compounds. gr The chemical products classified here are therefore products whose corn osition is not chemically defined, whether they are obtained as by- roducts of the manu acture of other substances (this applies, for example, to naphthenic acids7 or prepared directly. P The chemical or other preparations are either mixtures (of which emulsions and dispersions are special forms) or occas~onall solutions. Aqueous solutions of the chemical products of Chapter 28 or 29 remain classi led within those Chapters, but solutions of these products in solvents other than water are, apart from a few exceptions, excluded therefrom and accordingly fall to be treated as preparations of this heading. ? The preparations classified here may be either wholly or partly of chemical roducts (this is generally the case) or wholly of natural constituents (see, for example, paragrap (24) below). However, the heading does not cover mixtures of chemicals with foodstuffs or other substances with nutritive vaIue, of a kind used in the reparation of certain human foodstuffs either as ingredients or to improve some of their characteristics,g..!( improvers for pastry, biscuits, cakes and other bakers' wares), provided that such mixtures or substances are valued for their nutritional content itself. These products generally fall in heading 21.06. (See also the General ExplanatoryNote to Chapter 38.) This heading also excludes mercury compounds (heading 28.52). Subject to the above conditions, the preparations and chemical products falling here include : (1) Naphthenic acids (by-products of the refining of certain petroleum oils and of certain oils obtained from bituminous minerals), and their salts, other than the water-soluble naphthenates of heading 34.02, and salts of headings 28.43 to 28.46 and 28.52. The heading covers, for exam le, calcium, barium, zinc, manganese, aluminium, cobalt, chromium, lead, etc., naphti! enates, some of which are used for the preparation of driers or additives for mineral oils, and copper naphthenate used for the preparation of fungicides. (2) Non-agglomerated metal carbides (tungsten carbide, molybdenum carbide, etc.) mixed together or with metallic binders (such as cobalt), for the manufacture of the tips or the like for tools of heading 82.09. (3) Prepared additives for cements, mortars or concretes, for example, anti-acid additives with a basis of sodium or potassium silicate and sodium or potasslum fluorosilicate, and waterproofing preparations (whether or not containing soap), e.g., based on calcium oxide, fatty acids, etc. (4) Non-refractory mortars and concretes. (5) Sorbitol other than that of heading 29.05. This category covers, in particular, sorbitol (D-glucitol) s ps containin other polyols and in whcb the D- lucitol content normally ranges from to 80 % o the dry matter. Products of this kin are obtained by the hydrogenation of glucose syrups having a high disaccharide and polysaccharide content, without any separation process having taken place. They have the characteristic of bein difficult to crystallise and are used in a wide variety of industries (e.g., food, cosmetics, p armaceuticals, plastics, textiles). B 8% f Sorbitol meeting the requirements of Note 1 to Chapter 29 is classified in heading 29.05. Sorbitol of this kind is usually obtained by the hydrogenation of glucose or invert sugar. (6) Mixtures of calcium carbide, calcium carbonate (limestone) and other materials such as carbon or fluorspar, prepared for use as a desulphuriser in steel-making. (7) Cultured crystals (other than optical elements) weighin not less than 2.5 g each, of magnesium oxide or of the halides of the alkali or of the alfaline-earth metals (calcium or lith~umfluoride, potassium or sodium chloride, potassium bromide, otassium bromioclide, etc.). Optical elements of cultured crystals are excluded (heading 9g.01). Cultured c stals (other than optical elements) weighing less than 2.5 g each, are classified in Chapter heading 25.01 (sodium chloride crystals) or herding 31.01 (potassium chloride crystals). 8, (8) Petroleum sul honates, not water-soluble, obtained fiom etroleum or petroleum fractions by su phonation, for exam le, with sulphuric acid, o eum or sulphur trioxide dissolved in liquid sulphur dioxide, tRs process usually being followed by neutralisation. Water-soluble petroleum sulphonates, e.g., of alkali metals, of ammonium or of ethanolamines are, however, excluded (heading 34.02). P (9) Polychlorobi heayls chloropara ins. f (mixtures of chlorinated derivatives of biphenyl) and Solid polychlorobiphenyls and solid chloroparafKns having the character of artificial waxes are, however, excluded (heading 34.04). P (10) Pol (oxyethylene) (polyethylene ycol) with a very low molecular weight, e.g., mixtures of i-, tn-and tetra(oxyethy1ene) g ycols. B All other types of poly(oxyethy1ene) (polyethylene glycol) are, however, excluded (heading 39.07 or, if having the character of artificial waxes, heading 34.04). (1 1) Mixtures of mono-, di- and tri-, fatty acid esters of glycerol, used as emulsifiers for fats. Those which have the character of artificial waxes are, however, excluded (heading 34.04). (12) Fuse1 oil, which is obtained in the rectification of crude ethyl alcohol. (13) Dippel's oil (bone oil, animal oil, Jep el's oil) obtained by destructive distillation of the bones or horns of ruminants. It is a lackish liquid, extremely viscous and with a fetid odour, chiefly used in the preparation of insecticides or pyridine bases. % (14) Ion-exchangers (including base or acid exchangers) other than polymers of Chapter 39. These are insoluble compounds which, when brought into contact with a solution of an electrolyte, exchan e one of their own ions for one of those contained in a substance dissolved in that so ution, this pro e being of value industrially, e. for removing the calcium or ma esium salts fiorn ar water intended for boilers, for k e textile or dyeing industries, for aundries, etc. They are also used to convert salt water into drinking water, etc. Artificial zeolites (whether or not chemically deiined), except those containing binders are, however, excluded (heading 28.42). Y' f R9 (1 5) Anti-scaling compounds usually based on sodium carbonate, sodium silicate, tannin, etc. These compounds, added to hard water, precipitate most of the dissolved calcium and magnesium salts, thus reventing the formation of calcareous deposits in boilers, the tubes of steam generators an other apparatus through which water circulates. 'h (16) Oxylith (or oxygen stone), prepared b addin small quantities of products such as copper or nickel salts to sodium peroxide. ~ K i regu?ates s the release of oxygen on immersion in water. Oxylith is often in the form of cubes or slabs. (17) Additives to harden varnish or glue, e.g., mixtures of ammonium chloride and urea. (18) Getters for vacuum tubes, with a basis of barium, zirconium, etc. These getters are usually put up in pastilles, tablets or similar forms, or on metal tubes or wires. (19) Ink-removers ut up in packings for retail sale. These are usually aqueous solutions of chemically de ined compounds. In some cases a singe compound may be used (e-g., an aqueous solution of chloramine), but in others, two with complementary functions may be necessary. In the latter case, two bottles ma be provided in the same ackage, one containing, for example, an aqueous solution o sodium hydrogensulphite an the other an aqueous solution of potassium permanganate. P fY i' (20) Stencil correctors put up in packin s for retail sale. These are usually pink cellulose varnishes and are put up m small bot5es the caps of which are generally provided with a small brush. These varnishes are excluded from this headin when not put up for retail saIe as stencil correctors. Organic composite thinners for these vamishes!dl in heaL.6 38.14. (21) Correcting fluids put up in packings for retail sale. These are opaque (white or otherwise coloured) fluids conslstin essentially of pigments, binders, and solvents, used for masking errors or other unwante marks in typescripts, manuscripts, hotocopies, offset printing masters or the like. They are usually put up in small bottles (t! e cap of which is usually provided with a small brush), in tins or m the form of pens. f Organic composite thinners for these fluids fall in heading 38.14. (22) Correction tapes ut up in packings for retail sale. These are rolls of correction ribbons generally presentef; in a plashc dispenser, used for masking writing or typewriting errors or other unwanted marks in trpescri ts, manuscripts, photocopies, offset printing masters or the like. These products are avai able in different tape widths and lengths. The correction ribbon is composed of an opaque pigment coating which is ap lied on the surface of the ribbon. The coating is applied manually by pressing a trans er head on the part to be corrected. ? P The heading excludes (a) Correction tapes composed of paper with an adhesive backing (Chapter 48) (b) Mixtures Typewriter or similar ribbons, inked or otherwise prepared for giving impressions (23) Preparations used mainly for clarifying wines and other fermented beverages. These generally have a basis of poly(viny1 pyrrolidone) or elatinous or albuminous substances such as isinglass, gelatin, carrageen moss or egg a1 umin. However, those containing enzymes are excluded (heading 35.07). % (24) Compounded extenders for paints. These are repared powders often added to paints (other than distempers) to reduce their cost and at t e same time, in some cases, to improve certain properties e.g., to facilitate the spreading of colouring pigments). They are also used in the rnanu acture of distempers, but in this case they act as preparations consist of mixtures of two oi more natural products (cha , naturai barium These sulphate, slate, dolomite, natural magnesium carbonate, gypsum, asbestos, mica, talc, calcite, etc. , of mixtures of these natural products with chemcal products, or of mixtures of chemica products (e.g., mixtures of aluminium hydroxide and barium sulphate). R r Itgments This category also includes finely ground natural calcium carbonate ("' Cham agne white "), each particle being coated, by a special treatment, with a water-repellent ilm of stearic acid. P (25) Preparations for the manufacture of certain ceramic articles (artificial teeth, etc.), e.g., mixtures with a basis of kaolin, quartz and feldspar. (26) Fusible ceramic firing testers (Se er cones, etc.). These are usually in the shape of small pyramids, formed of mixtures o f substances similar to those in ceramic pastes and vitrifiable preparations. Their corn osition has been worked out so that they soften and collapse at a given temperature, an can thus be used for controlling the firing of articles such as ceramxc ware. B sodium hydroxide and used to absorb in submarines, etc. The heading (heading 38.22). (27) Soda-lime, prepared carbon dioxide in excludes soda-lime (28) Hydrated silica gel coloured with cobalt salts, used as a desiccating agent which indicates by its colour when it is no longer operating. (29) Anti-rust preparations. These may be preparations based on, for example, phosphoric acid which acts chemically in the prevention of rust. Anti-rust preparations based on lubricants fall in heading 27.10 or 34.03, as the case may be. (30) Preparations (e.g., tablets), consisting of saccharin or its salts and substances such as sod~um bicarbonate (sodium hydrogencarbonate) and tartaric acid, not being foodstuffs, used for sweetening purposes. (31) Salt for curing or salting, consistin of sodium chloride with added sodium nitrite (nitrited salts) or sodium nitrate (nitrate salts). % The same products containing added sugar are classified in heading 21.06. (32) Certain unmounted cut elements of piezo-electric materials (other than quartz, tourmaline, etc., of heading 71.03 or 71.04). The materials most commonly used for the production of the piezo-electric elements of this heading are : (a) Rochelle salt (or Seignette salt, i.e., potassium sodium tartrate tetrahydrate); ethylenediamine tartrate; orthophosphates of ammonium, rubidium or caesium or mixed crystals thereof. (b) Barium titanate; lead zirconate titanate; lead metaniobate; lead strontium titanate zirconate; calcium titanate; etc. The elements are obtained by precision cutting, relative to their electrical axes, of hi@ uality cultured c stals. Prior to cutting such c stals fall in their appropriate headings m 8hrpter 28 or 2 if they constitute separate c emically defined compounds; otherwise they fall in this heading. r 5" The headin also covers polycrystalline polarised elements of the products cited in subparagrap (b) above, provided they are unmounted. f (33) Anti-slip transmission belt preparations consisting of fatty substances, abrasives, etc., even if containing 70 % or more by weight of petroleum oils or of oils obtained from bituminous minerals. (34) Intermediate products of the manufacture of certain therapeutic substances (for example, antib~otics),obtained with the aid of micro-or anisms by fermentation, filtration and first stage extraction, generally containing not more 70 % of active substances; for example, " alkaline cakes ", which are intermediate products of the manufacture of chlorotetrac cline and which consist of inactive mycelium, filter aids, and 10 % to 15 d/o ofYch \ fh, (35) Articles producin a Ii hting effect by the phenomenon of chemiluminescence, e. ., lightsticks in whic the ighting effect is obtained by a chemical reaction between oxa ic acid type esters and hydrogen peroxide in the presence of a solvent and a fluorescent compound. b F f: (36) Starting fluid for petrol engines, consisting of diethyl ether, 70 % or more by weight of petroleum oils and also other constituents, the diethyl ether being the basic constituent. (37) Modellin paste in owder form (for use after mixing with water). The powder consists of about 0 % rye ff'our and about 30 % wood cellulose, together with cement, and chalk. The headng does not include, however, modelling pastes of heading 34.0f l.u e (38) " Flattin pigment(s) " consistin of the aluminium salt of a modified resinic acid, the particles exng coated with a cellu ose ether to protect them against solvents and to prevent sedmentation. f K (39) Fish-scale paste " or '' fish guano ", consisting of a crude silvery paste obtained by treating fish scales with white spirit, and, because of its guanine content, used after refining to make pearl essence. (40) Thallium bromoiodide c stals, consisting of a solid solution of bromide and iodide, used for their optical properties%igh transparency to infia-red radiation). (41) Gelling agent, a non-chemically defined product, consisting of a montmorillonite which has been subjected to a special treatment rendering it organophilic, put up in the form of a cream white powder, used in the manufacture of many organic preparations (paints, varnis es, vinyl polymer dispersions, waxes, adhesives, mastic compounds, cosmetics, etc.). i- (42) Fatty acids, industrial : (i) Dimerised. (ii) Trimerised. (iii)Esterified with arnyl alcohol and subsequently epoxydised. (43) Agglomerated mixture of technical molybdic oxide, carbon and boric acid, prepared for use as an alloying material in steel-making. (44) Powder described in trade as " grey oxide " or lC black oxide " and sometimes impro erly called '' lead dust ",being a specially prepared mixture of lead monoxide (65 to 0 %) and lead metal (the balance), obtained by controlled oxidation of pure lead in a ball mill process and used in the manufacture of storage battery plates. ! (45) Mixtures of isomers of two different organic compounds, divinylbenzene isomers 25 to 45 %) and ethylvinylbenzene isomers (typically 33 to 50 %), used as ('YPicall ng agents in polystyrene resins in which both sets of isomers take part in the cross-11 cross-linking. .& (46) Mixtures, used as thickeners and emulsion stabilisers in chemical reparations or as consisting o products of either binders in the manufacture of abrasive whether or not with materials separate headings or the same heahng o compositions : classified in other Chapters and having one P - mixture of various clays; mixture of various clays and feldspar; mixture of clay, powdered feldspar and powdered natural borax (tincal); - mixture of clay, feldspar and sodium silicate. (47) Mixtures used as plant owing media, such as potting soils, consisting of products classifiable in Chapter 25 &-th, sand, clay), whether or not they contain small quantities of the fertilising elements mtrogen, phosphorus or potassium. Mixtures of eat and sand or clay, the essential character of which is given by the peat, are, however, ucfuded (beading 27.03). (48) Copying pastes with a basis of gelatin. These are used to duplicate drawings, to coat printing machine rollers, etc. The composition of these pastes varies, but the essential constituent is gelatin, to which is added, in varyin proportions, dextrin and barium sulphate, or (if the pastes are to be used for the manu acture of inking rollers for printing machines) glycerol or sugar and fillers (kaolin, etc.) P These pastes are classified here whether presented in bulk (boxes, drums, etc.) or ready for use (generally on a paper or textile backing). The heading excludes inking rolIers for printing machines coated with copying paste (heading 84.43). (49) Diacevl tartaric acid ester of mono- and diglycerides mixed with tricalcium phosphate or calcium carbonate, used as emulsifiers. The heading also excludes : (a) Finishing a ents and other products or preparations, of a kind used in the textile, paper, leather or like industries Reading 38.09). (b) Mixtures of heat- or sound-insulating or sound-absorbin mineral materials of heading 68.06 or mixtures with a basis of asbestos or with a basis otasbestos and magnesium carbonate of heading 68.12.