Harmonized System

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Section VI > Chapter 28 > Heading 2850

Explanatory notes

… obtained by direct combination of its elements; white masses with a crystalline fracture, decomposing in the cold … insulator; used for lining electric ovens or for the manufacture of crucibles. Silicon nitride (Si 3 N 4 ) is a … (3)   Copper silicide ( other than copper silicon master alloys of heading 74.05 ). Usually in brittle plates. …

Section VI > Chapter 29 > Heading 2902

Explanatory notes

… cyclanes and to the general formula C n H 2n-x (in which x may be 2, 4, 6, etc.) when they are polycyclic cyclanes or … (C 6 H 5 CH=CH 2 )* . A colourless, oily liquid used mainly in the preparation of plastics (polystyrene) and of … inflammable, mobile liquid, contained in coal tar, normally manufactured from benzene and ethylene.       (3)    Cumene …

Section XV > Chapter 81 > Heading 8103

Explanatory notes

… : 8103.91 ‑ - Crucibles 8103.99 ‑ - Other Tantalum  is mainly extracted from the ores tantalite and niobite … or by electrolysis of fused tantalum‑potassium fluoride. It may be obtained as a compact metal, or as a powder for … when polished and steel blue when unpolished. It is very malleable and ductile when pure. It is unusually resistant …

Section XI > Chapter 52 > Heading 5203

Explanatory notes

… combed, whether or not further prepared for spinning. The main purpose of carding is to disentangle the cotton fibres, … and entirely or largely free them from any extraneous matter they may still contain. The fibres are then in the form of wide …

Section XX > Chapter 96 > Heading 9612

Explanatory notes

… on spools or in cartridges, for typewriters, calculating machines, or for any other machines incorporating a device … are usually of woven textiles, but sometimes they are made of plastics or paper. To fall in the heading, they must …

Section XIII > Chapter 70 > Heading 7007

Explanatory notes

… physical-chemical treatment (e.g., ion-exchange) which may include a modification of the surface structure … glass”).         This glass cannot be worked after manufacture because of the internal stresses set up by the … commonly known as laminated glass, sandwich glass, etc., is made in sandwich form, with one or more interlayers of …

Section VI > Chapter 28 > Heading 2840

Explanatory notes

… 10 H 2 O. Heated and then cooled down, it gives a vitreous mass (melted borax, borax glass, borax bead). Used for … (flux for hard solder); as a flux for enamels; in the manufacture of vitrifiable colours, special glass (optical … of boric anhydride; hence its use as a fire‑proofing material. Also used as a fixative in hair‑lotions; as a …

Section VI > Chapter 28 > Heading 2815

Explanatory notes

… with milk of lime or by electrolysing sodium chloride. It may be presented as an aqueous solution or an anhydrous … in well‑sealed steel containers. It is a powerful base with many industrial uses : preparation of certain chemical wood pulps by elimination of the lignin, manufacture of regenerated cellulose, mercerising of cotton, …

Section VI > Chapter 29 > Heading 2916

Explanatory notes

… peroxyacids and their derivatives               - Aromatic monocarboxylic acids, their anhydrides, halides, … potassium, and ammonium oleates) are soaps but they remain classified in this heading. (4)   Linoleic acid (C 18 H … a floral odour. Used in perfumes and flavourings, in the manufacture of penicillin G and fungicides, in organic …

Section XV > Chapter 82 > Heading 8202

Explanatory notes

… covers : (A)  Hand saws for wood, metal, stone or other materials, whether for trade or domestic use.         These … (B)   Saw blades of all kinds, for hand saws and for machines, and for all materials. They include : (1) Band saw …