Harmonized System

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Section VI > Chapter 28 > Heading 2840

Explanatory notes

… mentioned in the introduction to this sub‑Chapter, this heading covers borates, metal salts of the various boric … by crystallisation of solutions of natural borates, or by treating natural calcium borates or boric acid with sodium … mass (melted borax, borax glass, borax bead). Used for stiffening linen or paper; in soldering metals (flux for …

Section XVIII > Chapter 90 > Heading 9012

Explanatory notes

… diffraction apparatus 9012.90 ‑ Parts and accessories This heading includes : (A)  Electron microscopes differ from … normal type of electron microscope is an assembly of the following devices usually enclosed in a common frame as a unit : (1) A device (known as an electron gun) for emitting and accelerating the electrons. (2) A system …

Section VI > Chapter 29 > Heading 2901

Explanatory notes

… 2901.29 - - Other Acyclic hydrocarbons are compounds containing only carbon and hydrogen which have no rings in their structure. They can be classified in two … 8 ) with three atoms of carbon are, however, classified in heading 27.11 even if they are pure. The saturated acyclic …

Section XV > Chapter 75 > Heading 7502

Explanatory notes

… ‑ Nickel alloys Unwrought nickel is usually in the form of ingots, pigs, pellets, flats, cubes, rondelles, briquettes, … Some of the forms are used in titanium baskets for nickel plating, or for the production of nickel powder. Unrefined nickel is normally cast into anodes for refining by electrolysis. The anodes of this heading are …

Section VI > Chapter 28 > Heading 2839

Explanatory notes

… mentioned in the introduction to this sub‑Chapter, this heading covers silicates, metal salts of the various silicic … (heading 28.11). (1)   Sodium silicates . Obtained by melting sand and sodium carbonate or sulphate. Their … or less viscous aqueous solutions. They deflocculate the gangues of ores and are used as flotation regulators. Also …

Section XVI > Chapter 85 > Heading 8526

Explanatory notes

… apparatus 8526.92 ‑ ‑ Radio remote control apparatus This heading includes : (1)   Radio navigational aid equipment … (e.g., radio beacons and radio buoys, with fixed or rotating aerials; receivers, including radio compasses equipped with multiple aerials or …

Section VI > Chapter 35 > Heading 3504

Explanatory notes

… or included; hide powder, whether or not chromed. This heading covers : (A)  Peptones and their derivatives . (1) … etc.). They are usually white or yellowish powders and, being very hygroscopic, they are normally packed in airtight … in pharmacy; the most important are iron peptonates and manganese peptonates. (B)   Other protein substances and …

Section VI > Chapter 28 > Heading 2832

Explanatory notes

… mentioned in the introduction to this sub‑Chapter, this heading covers : (A)  Metal sulphites ‑ salts of sulphurous … in concentrated solution, yellowish in colour. Used as a reducing agent in organic synthesis, in the manufacture of indigo, for bleaching wool or silk, as a vulcanising agent for the …

Section VI > Chapter 28 > Heading 2806

Explanatory notes

… or more molecules of water are eliminated from those acids containing oxygen, anhydrides are obtained. Most oxides of … such as acids or anhydrides of chromium, molybdenum, tungsten and vanadium). In certain cases, however, they fall elsewhere, e.g., in heading 28.43 (compounds of precious metals), heading 28.44 …

Section V > Chapter 25 > Heading 2503

Explanatory notes

… sulphur, precipitated sulphur and colloidal sulphur. The heading includes : (1)   Crude mineral sulphur occurring in the free state, whether or not concentrated by … (2)   Unrefined sulphur extracted from mineral sulphur by melting. This process may be carried out in sulphur kilns …