Harmonized System

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Section VI > Chapter 28 > Heading 2833

Explanatory notes

… Peroxosulphates (persulphates) (A) SULPHATES Subject to the exclusions mentioned in the introduction to this … and are classified in this heading. Disodium sulphate is used as an adjuvant in dyeing; as a flux in glass‑making to …

Section II > Chapter 14 > Heading 1404

Explanatory notes

… still covered with a fine down formed of very short fibres (usually less than 5 mm long). These fibres are known as … rayon) and cellulose plastics. They are also sometimes used in the manufacture of certain varieties of paper, …

Section XVI > Chapter 84 > Heading 8479

Explanatory notes

… - Passenger boarding bridges : 8479.71 ‑ ‑ Of a kind used in airports 8479.79 ‑ ‑ Other               ‑ Other …

Section XIII > Chapter 70 > Heading 7019

Explanatory notes

… are randomly oriented, forming a bulky product, mostly used for insulation purposes. There are two types of glass … number of continuous parallel filaments with diameters usually between 3 and 34 µm (microns ); after forming, those … to be obtained by inter-looping loops of connected fibres using a knitting system in the length direction (warp …

Section VI > Chapter 28 > Heading 2825

Explanatory notes

… liquid which fumes in the air. A powerful reducing agent, used in the manufacture of a priming explosive or in … peroxide (CaO 2 ) is a white or yellowish powder, hydrated (usually with 8 H 2 O), sparingly soluble in water. Used as a …

Section VI > Chapter 28 > Heading 2804

Explanatory notes

… is presented under pressure in thick steel cylinders. It is used for hydrogenating oils (preparation of solid fats), for … exclusively by carbothermal reduction of silicon dioxide using electric arc-furnaces.  It is a poor conductor of heat …

Section VI > Chapter 28 > Heading 2836

Explanatory notes

… formation of the acid carbonate, but may still be used in this state.        Ammonium carbonate is used as a … (acid carbonate, sodium bicarbonate) (NaHCO 3 ). Usually a crystalline powder or white crystals, soluble in …

Section VI > Chapter 29 > Heading 2939

Explanatory notes

… Some are obtained by synthesis. They are all more or less poisonous. This heading covers unmixed alkaloids and natural … (3)   Diacetylmorphine (heroin), crystalline white powder; used as a sedative in place of codeine and morphine. (4)   …

Section VI > Chapter 28 > Heading 2812

Explanatory notes

… about 3. Decomposed by water; it burns the skin badly. Used in organic synthesis as an iodinating agent. (b) Iodine … by water; rather unstable. Specific gravity about 1.6. Uses include : the cold vulcanisation of rubber, as a …

Section VI > Chapter 35 > Heading 3507

Explanatory notes

… produced by living cells; they have the property of causing and regulating specific chemical reactions inside or … generally in crystalline form, and are mainly intended for use in medicine or in scientific research. They are not as … agents (e.g., glycerol).         Rennet is mainly used in the cheese industry. (2)         Pancreatic enzymes …