Harmonized System

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Section VI > Chapter 38 > Heading 3815

Explanatory notes

… preparations include : (i)  “free radical catalysts” (e.g., organic solutions of organic peroxides or of azo compounds, redox mixtures); (ii) … or metal alloys in the form of finely divided powder, woven gauze, etc. ( Section XIV  or  XV ). (d)   Prepared rubber …

Section V > Chapter 27 > Heading 2714

Explanatory notes

… in this heading whether or not treated to remove water or gangue and whether or not pulverised or mixed together.The … or in a form from which these products can be extracted. Gas and other products may also be obtained. The separation … The hydrocarbons contained in shale may be in the form of organic materials called kerogens. …

Section XV > Chapter 83 > Heading 8307

Explanatory notes

… of the edge. Tubing of this type may be rendered water or gas tight by packing with rubber, asbestos, textiles, etc. … vacuum cleaner tubing; conduits for compressed air, steam, gas, water, petrol, oil or other fluids in engines, … flexible transmission piping, rubber tubing, etc. (2)   Corrugated flexible tubing obtained, e.g., by deformation of …

Section VI > Chapter 28 > Heading 2839

Explanatory notes

… or less viscous aqueous solutions. They deflocculate the gangues of ores and are used as flotation regulators. Also … . Used for similar purposes to sodium silicates. (3)   Manganese silicate (MnSiO 3 ). Orange‑coloured powder, …

Section VI > Chapter 29 > Heading 2923

Explanatory notes

… perfluorooctane sulphonate 2923.90 - Other Quaternary organic ammonium salts contain one tetravalent nitrogen … of general formula R 4 N + OH –  corresponding to its inorganic parent ammonium hydroxide NH 4 OH. The residuary …

Section XVIII > Chapter 90 > Heading 9004

Explanatory notes

… to correct certain defects of vision or to protect the eyes against dust, smoke, gas, etc., or dazzle; it also covers spectacles for viewing … polystyrene, etc.), of mica, or of metal (wire gauze, or slotted plates). These articles include …

Section XVII > Chapter 89 > Heading 8906

Explanatory notes

… and defensive weapons and incorporating protective shields against projectiles (e.g., armour‑plating or multiple … the size of the crew, by bigger fuel tanks and by special magazines for the transport and use of ammunition at sea. … fabric, identifiable by their shape (generally like a cigar) and by the presence of various devices such as …

Section XVIII > Chapter 90 > Heading 9016

Explanatory notes

… of light alloys, with knife‑edges, bearings and planes of agate. To protect the balances from air currents and dust, … to special treatment (heating, cooling, the action of a gas, vacuum treatment, exposure to light, etc.). Weight … parts and accessories (including mounted or unmounted agate knife‑edges, bearings and planes), identifiable as …

Section VI > Chapter 36 > Heading 3602

Explanatory notes

… powders. Combustion produces an extremely large release of gas at a high temperature, creating an enormous pressure … Explosives consisting of mixtures based on other organic nitrates or on nitro-compounds , such as … are usually included in Chapter 28 or 29 , e.g., inorganic nitrates ( heading 28.34 ), mercury fulminate ( …

Section VI > Chapter 37

Explanatory notes

… 1,300 nanometers in the electromagnetic spectrum (including gamma-rays, X-rays, ultra-violet and near-infrared … visible). Plates and film remain in the Chapter whether negative (i.e., with lights and shades reversed ), positive … are included in the Chapter only when unexposed or exposed (negative or positive) but not developed; after development, …