WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
29.24 - Carboxyamide-functioncompounds; amide-function compounds of carbonic acid. - Acyclic thereof : amides (including acyclic carbamates) and their derivatives; salts 2924.1 1 - - Meprobamate (INN) 2924.12 2924.19 - - Fluoroacetamide (ISO), monocrotophos (ISO)and phosphamidon (ISO) - - Other - 2924.21 2924.23 2924.24 2924.29 Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof: - - Ureines and their derivatives; salts thereof - - 2-Acetamidobenzoic acid (N-acetylanthranilic acid) and its salts - - Ethinamate (INN) - - Other This heading covers arnide derivatives of carboxylic acids and of carbonic acid (but not amide derivatives of other inorganic acids - heading 29.29). Amides are compounds which contain the following characteristic groups : (-corn,) Pnmary amide ((-CO)zNH) Secondary m d e ((WOhN) Tertiary amide (>w) The hydrogen of the (-NH2) or pi may be substituted by alkyl or aryl radicals, in which case the products are N- substitute am1 es. Some amides of this heading also contain a diazotisable amine group. These arnides and their salts, diluted to standard strengths for the production of azo dyes, are also included here. Ureines are derived from urea by replacing one or more hydrogen atoms of the -JWb groups by alicyclic or aryl radicals. Ureides are obtained fiom urea by replacing one or more of the hydrogen atoms of the -NH, group by acid radicals. This heading excludes, however, urea (H2NCONH2),the diamide of carbonic acid, which is principally used as a fertiliser and, even if pure, falls in heading 31.02 or 31.05. (A) ACYCLIC AMIDES (1) Acetamide. (2) Asparagine, the mono-amide of aspartic acid. Extracted fiom certain vegetables. Crystalline. (3) Open chain ureides (bromodiethylacetylurea, bromoisovalerylurea). (4) Ethyl carbamate (urethan). (5) Glutamine. This heading excludes 1-cyanoguanidine (dicyandiamide) (heading 29.26). (B) CYCLIC AMIDES (1) Ureines and ureides. The main ureines include : (i) p-Ethoxyphenylurea (dulcin). (ii) Diethyldiphenylurea (centralite). (2) Acetanilide, methyl- and ethylacetanilide, acet-p-phenetidide p-acetamidophenol and p-acetamidosalol, used in medicine. (phenacetin), (3) Phenylacetamide. (4) N-Acetoacetyl derivatives of cyclic amines, e.g., acetoacetanilide; amides of hydroxynaphthoic acid, e.g., 3-hydroxy-2-naphthanlhde; diatrizoic acid and its salts, used as opacifiers in radiography. Some of these compounds are known in trade as "arylides". r (5) ZAcetamidobenzoic acid. Colourless to yellowish c stals in the form of needles, or rhomboids. Used as a recursor in the production o methaqualone (INN) (see the plates 1st of precursors at the end of hapter 29). E This heading excludes, however, heterocyclic ureides, e.g., maionylurea (barbituric acid) and hydantoin (heading 29.33). Certain substances of this heading, which are regarded as narcotic drugs or as psychotropic substances under international instruments, are indicated in the List appearing at the end of Chapter 29.
1.- Except where the context otherwise requires, the headings of this Chapter apply only to : (a) Separate chemically defined organic compounds, whether or not containing impurities; (b) Mixtures of two or more isomers of the same organic compound (whether or not containing impurities), except mixtures of acyclic hydrocarbon isomers (other than stereoisomers), whether or not saturated (Chapter 27); (c) The products of headings 29.36 to 29.39 or the sugar ethers, sugar acetals and sugar esters, and their salts, of heading 29.40, or the products of heading 29.41, whether or not chemically defined; (d) The products mentioned in (a), (b) or (c) above dissolved in water; (e) The products mentioned in (a), (b) or (c) 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; (f) The products mentioned in (a), (b), (c), (d) or (e) above with an added stabiliser (including an anti- caking agent) necessary for their preservation or transport; (g) The products mentioned in (a), (b), (c), (d), (e) or (f) above with an added anti-dusting agent or a colouring or odoriferous substance or an emetic 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; (h) The following products, diluted to standard strengths, for the production of azo dyes : diazonium salts, couplers used for these salts and diazotisable amines and their salts. 2.- This Chapter does not cover : (a) Goods of heading 15.04 or crude glycerol of heading 15.20; (b) Ethyl alcohol (heading 22.07 or 22.08); (c) Methane or propane (heading 27.11); (d) The compounds of carbon mentioned in Note 2 to Chapter 28; (e) Immunological products of heading 30.02; (f) Urea (heading 31.02 or 31.05); (g) Colouring matter of vegetable or animal origin (heading 32.03), synthetic organic colouring matter, synthetic organic products of a kind used as fluorescent brightening agents or as luminophores (heading 32.04) or dyes or other colouring matter put up in forms or packings for retail sale (heading 32.12); (h) Enzymes (heading 35.07); (ij) Metaldehyde, hexamethylenetetramine or similar substances, put up in forms (for example, tablets, sticks or similar forms) for use as fuels, or liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters and of a capacity not exceeding 300 cm3 (heading 36.06); (k) Products put up as charges for fire-extinguishers or put up in fire-extinguishing grenades, of heading 38.13; ink removers put up in packings for retail sale, of heading 38.24; or (l) Optical elements, for example, of ethylenediamine tartrate (heading 90.01). 3.- Goods which could be included in two or more of the headings of this Chapter are to be classified in that one of those headings which occurs last in numerical order. 4.- In headings 29.04 to 29.06, 29.08 to 29.11 and 29.13 to 29.20, any reference to halogenated, sulphonated, nitrated or nitrosated derivatives includes a reference to compound derivatives, such as sulphohalogenated, nitrohalogenated, nitrosulphonated or nitrosulphohalogenated derivatives. Nitro or nitroso groups are not to be taken as “nitrogen-functions” for the purposes of heading 29.29. For the purposes of headings 29.11, 29.12, 29.14, 29.18 and 29.22, “oxygen function”, the characteristic organic oxygen-containing group of those respective headings, is restricted to the oxygen-functions referred to in headings 29.05 to 29.20.