Harmonized System
Section VI > Chapter 28 > Heading 2831
… Dithionites and sulphoxylates. …
Explanatory notes
… 28.31 ‑ Dithionites and sulphoxylates. 2831.10 ‑ Of sodium 2831.90 ‑ Other Dithionites (hydrosulphites) are the salts of dithionous (“hydrosulphurous”) acid (H 2 S 2 O 4 ) which has not been isolated …Section VI > Chapter 38 > Heading 3804 > 3804.00
… the manufacture of wood pulp, whether or not concentrated, desugared or chemically treated, including lignin sulphonates, but excluding tall oil of heading 38.03 …
Section VI > Chapter 28 > Heading 2808
… Nitric acid; sulphonitric acids. …
Explanatory notes
… 28.08 ‑ Nitric acid; sulphonitric acids. (A) NITRIC ACID Nitric acid (HNO 3 ) is … oxide oxidised. It can also be prepared by the action of sulphuric acid (alone or associated with sodium disulphate) …Section XVI > Chapter 85 > Heading 8546
… Electrical insulators of any material. …
Explanatory notes
… ‑ Other Insulators of this heading are used for the fixing, supporting or guiding of electric current conductors while … thermic and mechanical considerations. The external surface is very smooth in order to prevent the formation of deposits of non‑insulating materials, such as water, salts, dusts, oxides and smoke. Insulators …Section VI > Chapter 34 > Heading 3407
… for use in dentistry, with a basis of plaster (of calcined gypsum or calcium sulphate). …
Explanatory notes
… with a basis of plaster (of calcined gypsum or calcium sulphate). (A) Modelling pastes . These are plastic … of wax, plastics or gutta-percha, mixed with products such as rosin, shellac and fillers (e.g., powdered mica) and …Section VI > Chapter 28 > Heading 2806
… Hydrogen chloride (hydrochloric acid); chlorosulphuric acid. …
Explanatory notes
… Sub-Chapter II INORGANIC ACIDS AND INORGANIC OXYGEN … IV (e.g., metal oxides, hydroxides and peroxides, such as acids or anhydrides of chromium, molybdenum, … Hydrogen chloride (HCl) is a colourless fuming gas with a suffocating odour, obtained by the action of hydrogen (or of …Section XIII > Chapter 70 > Heading 7008
… Multiple-walled insulating units of glass. …
Explanatory notes
… 70.08 - Multiple-walled insulating units of glass. This heading covers … of two or more panels of glass (sheet, plate, float or even such types as hammered or cathedral) separated by a layer of … windows, roofs, etc., provide a degree of heat and sound insulation and reduce condensation. …Section XI > Chapter 50 > Heading 5001
… Silk-worm cocoons suitable for reeling. …
Explanatory notes
… 50.01 ‑ Silk worm cocoons suitable for reeling. This heading applies only to those … to become raw silk classified in heading 50.02. Cocoons unsuitable for reeling are excluded ( heading 50.03 ). Silk‑worm cocoons are usually whitish, yellowish or sometimes greenish. …Section V > Chapter 25 > Heading 2530
… Mineral substances not elsewhere specified or included. …
Explanatory notes
… 25.30 ‑ M ineral substances not elsewhere specified or included. 2530.10 ‑ … unexpanded 2530.20 ‑ Kieserite, epsomite (natural magnesium sulphates) 2530.90 ‑ Other (A) EARTH COLOURS, WHETHER OR NOT … pieces (the sides seldom exceed 30 cm). These pieces are submitted to a preliminary cleaning, scraping, wool …Section II > Chapter 12 > Heading 1206
… Sunflower seeds, whether or not broken. …