Harmonized System

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Section VI > Chapter 28 > Heading 2840

Explanatory notes

… (perborates) (A) BORATES Subject to the exclusions mentioned in the introduction to this sub‑Chapter, this heading covers … from certain salt lakes. (1)   Sodium borates . The most important is the tetraborate (disodium tetraborate, refined …

Section XV > Chapter 81 > Heading 8112

Explanatory notes

… is used in the manufacture of windows for X‑ray tubes; as components for nuclear reactors; in the aircraft and space industry; in the armament industry; as targets for cyclotrons; in electrodes for neon signs, etc.; as a de‑oxidising agent in metallurgy. It also serves in the preparation of …

Section VI > Chapter 28 > Heading 2850

Explanatory notes

… The four groups of compounds covered by this heading each contain two or more elements, one of which is described by the term used … others being non‑metals or metals. (A) HYDRIDES The most important hydride is calcium hydride (CaH 2 ) (hydrolith) …

Section VI > Chapter 28 > Heading 2843

Explanatory notes

… flakes, bluish, brownish or greenish‑grey, with a metallic glint. It is used in medicine as an antiseptic. Colloidal gold may be red, violet, blue or … in this heading when put up in colloidal solutions containing protective colloids (such as gelatin, casein, …

Section XVI > Chapter 84 > Heading 8433

Explanatory notes

… 8433.11 ‑ ‑ Powered, with the cutting device rotating in a horizontal plane 8433.19 ‑ ‑ Other 8433.20 ‑ Other mowers, including cutter bars for tractor mounting 8433.30 ‑ Other haymaking machinery 8433.40 ‑ Straw … tractors fitted with harvesting, threshing, mowing or other interchangeable attachments, and in respect of motor rakes. …

Section XVI > Chapter 85 > Heading 8507

Explanatory notes

… to store electricity and supply it when required. A direct current is passed through the accumulator producing certain … for the life of the accumulator. Accumulators consist essentially of a container holding the electrolyte in which are immersed two …

Section XIV > Chapter 71 > Heading 7113

Explanatory notes

… precious metal, that is : (A) Small objects of personal adornment (gem-set or not) such as rings, bracelets, … brooches, ear-rings, neck chains, watch-chains and other ornamental chains; fobs, pendants, tie-pins and clips, cuff-links, dress-studs, …

Section VI > Chapter 28 > Heading 2804

Explanatory notes

… - Boron; tellurium               - Silicon : 2804.61 - - Containing by weight not less than 99.99 % of silicon … It is generally regarded as a non‑metal. It is presented under pressure in thick steel cylinders. It is … of solid fats), for cracking petroleum products, in the synthesis of ammonia, for cutting or welding metals …

Section XIII > Chapter 70 > Heading 7009

Explanatory notes

… sometimes platinum or aluminium) to give a clear and brilliant reflection. In the silvering method a dilute … on to the glass, which is then heated almost to softening point. This gives a very adherent coating of metal. The metal coating (particularly …

Section VI > Chapter 28 > Heading 2849

Explanatory notes

… carbides , which are compounds of carbon with another element more electropositive than carbon. Those known as … in grains. Fusible only with difficulty; resists chemical reagents; has a certain power of refraction, and is nearly … graphite and boric acid in an electric furnace; hard brilliant blackish crystals. Used as abrasive, for boring …