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Harmonized System
Section VI > Chapter 29 > Heading 2935
Explanatory notes
… bonds or rings). Many are used in medicine as powerful bactericides. They include, inter alia : (1) N-Alkylperfluorooctane sulphonamides * . … These chemicals break down to form perfluorooctane sulfonate (PFOS) (see also headings 29.04, 29.22, 29.23, …Section XV > Chapter 73 > Heading 7311
Explanatory notes
… (e.g., helium, oxygen, argon, hydrogen, acetylene, carbon dioxide or butane). Some are strong cylinders, tubes, bottles, etc., tested at high pressure; these may be weldless or welded (e.g., at the bases, round the middle or along the length). Others consist of an inner …Section XV > Chapter 81 > Heading 8108
Explanatory notes
… 8108.90 ‑ Other Titanium is obtained by reduction of the oxide ores rutile and brookite, and from ilmenite (titaniferous iron ore). … of tungsten), as ferro‑titanium (Chapter 72) or as titanium carbide. Titanium is white and shiny when compact, dark grey …Section VI > Chapter 29 > Heading 2911
Explanatory notes
… may be regarded as di-ethers of (normally hypothetical) hydrates of aldehydes and ketones. Hemiacetals are … of the hypothetical hydrate of formaldehyde. Colourless liquid with an ether-like odour; used as a solvent, as an … from the hypothetical hydrate of acetaldehyde. A colourless liquid with an agreeable ether-like odour; used as a solvent …Section V > Chapter 25 > Heading 2520
… Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) …
Explanatory notes
… 25.20 ‑ Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) … or retarders. 2520.10 ‑ Gypsum; anhydrite 2520.20 ‑ Plasters Gypsum is a natural hydrated calcium sulphate … calcium sulphate used in the manufacture of sulphuric acid or of certain types of plaster. Plasters consist of …Section I > Chapter 5 > Heading 0504
Explanatory notes
… prepared or preserved such products are excluded (generally Chapter 16 ). This heading includes : (1) Rennet bags (calf, kid, etc.), whether or not cut or dried; these are used for … Tripe and paunches. (When cooked, they are classified in Chapter 16 .) (3) Unworked goldbeater’s skin, which is the …Section VI > Chapter 38 > Heading 3804
… Residual lyes from the manufacture of wood pulp, whether or …
Explanatory notes
… 38.04 ‑ Residual lyes from the manufacture of wood pulp, whether or … Residual lyes from the manufacture of wood pulp by the sulphite process , whether or not concentrated, desugared or … sulphite lye consists mainly of salts of lignosulphonic acids mixed with sugars and other products. It is usually in …Section XI > Chapter 57
Explanatory notes
… fringed, assembled, etc.), in the form of carpet squares, bedside rugs, hearth rugs, or in the form of carpeting for installation in rooms, corridors, passages or stairs, in the length for cutting and …Section VI > Chapter 28 > Heading 2822
… Cobalt oxides and hydroxides; commercial cobalt oxides. …