Harmonized System

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Section VI > Chapter 29 > Heading 2931

Explanatory notes

… ‑ ‑ Salt of methylphosphonic acid and (aminoiminomethyl)urea (1 : 1) 2931.46 ‑ ‑ … . (b) Salt of methylphosphonic acid and (aminoiminomethyl)urea (1 : 1) . (c)  …

Section VI > Chapter 28 > Heading 2809

Explanatory notes

… by combustion, in dry air, of phosphorus extracted from natural phosphates. It is a very corrosive white powder, … phosphoric acid) (H 3 PO 4 ) is obtained by the action of sulphuric acid on natural tricalcium phosphate. The commercial acid thus prepared contains as impurities diphosphorus pentaoxide, calcium …

Section VII > Chapter 39 > Heading 3907

Explanatory notes

… acid)               ‑ Other polyesters : 3907.91 ‑ ‑ Unsaturated 3907.99 ‑ ‑ Other This heading covers : (1)  … plastics, polyoxypropylene as an intermediate for polyurethane foam. This heading also covers pegylated … resins or other polyhydroxy compounds or by epoxidising unsaturated polymers. Whatever the basic structure of the …

Section XVI > Chapter 84 > Heading 8428

Explanatory notes

… if specialised for a particular industry, for agriculture, metallurgy, etc. This heading is not limited to lifting or … systems, and often including large proportions of static structural steelwork, etc. These static structural elements … are fitted or designed to be fitted with the mechanical features essential for the operation of the moving parts of …

Section XI > Chapter 51 > Heading 5101

Explanatory notes

… ‑ Carbonised Throughout the Nomenclature, “wool” means the natural fibre grown by sheep or lambs. Wool fibres are … of the protein keratin, and have a characteristic scaly surface. They are elastic, extremely hygroscopic (absorb moisture from the air) and, as a rule, have marked felting …

Section VI > Chapter 36 > Heading 3602

Explanatory notes

… other than propellent powders. This heading covers mixtures of chemical substances the combustion of which … release of gas at a high temperature, creating an enormous pressure within a very short period. Phlegmatising agents … nitrocellulose (gun-cotton), ammonium nitrate, peat, wood flour, sodium chloride or granulated aluminium. (2)         …

Section XV > Chapter 74 > Heading 7406

Explanatory notes

… powders and flakes. 7406.10 ‑ Powders of non‑lamellar structure 7406.20 ‑ Powders of lamellar structure; flakes … metal powders (e.g., “bronze powder” consisting of a simple mixture of copper and tin powders). Copper powders are … substances (e.g., stearic acid or paraffin wax) used in the course of their preparation. The powders are used for …

Section XI > Chapter 56 > Heading 5603

Explanatory notes

… or randomly and bonded. These fibres may be of natural or man‑made origin. They may be staple fibres … web formation, bonding and finishing. I.  Web formation Four basic methods exist : (a)  by carding or air‑laying … and dispersing fibres in water, depositing the resultant slurry onto a wire screen and forming a web by removal of …

Section XVI > Chapter 84 > Heading 8445

Explanatory notes

… of heading 84.46 or 84.47. (A) MACHINERY FOR PREPARING NATURAL TEXTILE FIBRES OR SHORT MAN‑MADE FIBRES UP TO THE … width into compartments into which the hairs are blown by a current of air. The hairs are distributed into the various … separating cotton fibres from the seeds, hulls and other impurities (e.g., cotton gins), and similar machines for …

Section VI > Chapter 29 > Heading 2921