WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
29.06 -Cyclic dcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives. 2906.11 2906.12 2906.13 2906.19 - Cyclanic, cyclenic or cycloterpenic : - - Menthol - - Cyclohexanol, rnethylcyclohexanols and dimethylcyclohexanols - - Sterols and inositols - - Other - Aromatic : 2906.21 2906.29 - - Benzyl alcohol - - Other (A) CYCLANIC, CYCLENIC OR CYCLOTERPENIC ALCOHOLS A N D THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES (1) Menthol, a secondary alcohol which is the main constituent of eppermint oil. Crystals; used as an antiseptic, as a local anaesthetic and also to relieve nasa congestion. ? (2) CJ clohexanol, methyl- and dimethylc clohexanols are compounds with a characteristic o our like camphor. They are used as so vents for varnishes. Dtmethylcyclohexanol is used in soap-making. , (3) Sterols are alicyclic alcohols, saturated or unsaturated, the structure of which is derived from the hydrocarbon perhydro-1,2-cyclopentanophenanthrene,the hydroxyl linked to the 3-carbon, with a methyl grou on the 10- and 13-carbons and a si e chain of to 10 carbon atom linked to the 17-car on. They exist abundantly both in the animal (zoosterols) and vegetable (phytosterols) kingdoms. The most important is cholesteroI obtained mainly from the spinal cords of cattle and from wool grease; it is also obtained from bile, and as a b -product during the extraction of lecithin from egg-yolks. It is in the form of shiny, colour ess tablets, insoluble in water. PP T This heading excludes ergosterol, found in fungi (mus~ooms)and in spurred rye, a provitamin fi-om which vitamin D2 is obtained by ultra-violet irradiation. Both ergosterol and vitamin D2 fall in heading 29.36. (4) Inositols, constituents of body tissue. There are nine isomeric forms of inositol. White crystals. Widely distributed in plants and animals. (5) Terpineols, very irn ortant alcohols used as a basis for perfumes such as lilac, etc. Found in nature either in t e free state or esterified in many essential oils (e.g., of cardamoms, sweet orange, orange-flower, petit-grain, sweet marjoram, nutmeg, turpentine, cherrylaurel, camphor). % Commercial ter ineol is usually a mixture of isomers but it remains in this headin (see Note I @) to &aptex 29). It is a colourless, oily liquid, and is sometimes used? as a bactericide. A solid isomer is used in medicine and may also be used as a bactericide. stals. Terpin h drate is obtained from turpentine; (6) Terpin, obtained synthetically. White colourless crystals, aromatic. Used in me icine, and also or the preparation of terpineol. (7) Borneo1 (Borneo cam hor), the alcohol corresponding to the ketone camphor. Appearance P and odour like natura camphor; crystalline white or sometimes brownish mass; volatile at room temperature. (8) Isoborneol, lamellar crystals; an intermediate stage in the conversion of alphapinene to camphor. (9) Santalol, main constituent of sandalwood oil. (B) AROMATIC ALCOHOLS AND THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES Aromatic alcohols contain the hydroxyl group (-OH)linked not to the aromatic rings but to the side chains. (1) Benzyl alcohol (phenylmethanol, phen lcarbinol). Found in the free state or esterified in 011s of jasmine and tuberose, and esteri ed in storax and balsam of Tolu. Colourless liquid with a pleasant aromatic odour; used in organic synthesis and in the preparation of varnishes, dyestuffs, artificial perfumes, etc. (2) 2-Phenylethanol (phenylethyl alcohol). A liquid forming the main constituent in attar of roses. (3) 3-Phenylpro an01 (phenylpropyl alcohol). Pound in storax, in Sumatra gum benzoin, in cassia oil an in Chinese cinnamon oil; it IS a dense, colourless liquid with a faint odour of hyacinths. (4) Cinnamyl alcohol. Found in liquid storax and in balsam of Peru. Crystallises in needles with an odour of hyacinths. (5) Diphenylmethanol (diphenylcarbinol, benzhydrol). Crystallises in needles. (6) Triphenylrnethanol (triphen lcarbinol). Crystals. This alcohol is the parent substance of an rmportant group of dyes w ich includes aurine, rosaniline, etc. K a For the urposes of this heading, aldehyde-bisul hite compounds and ketone-bisulphite corn oun s are classified as sulphonated denvatives o alcohols. This heading also covers metal alco olates of cyclic alcohols. E P Sub-chapter I11 PHENOLS, PHENOL-ALCOHOLS, AND THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES
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.