Harmonized System

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Section VI > Chapter 28 > Heading 2833

Explanatory notes

… crystals, efflorescing in the air and dissolving in water with a fall in temperature. The decahydrate (Na 2 SO 4 … copper refining; also obtained by treating copper waste or scrap with a weak solution of sulphuric acid. Blue … a white hydrate (with 9 H 2 O). Used for purifying natural waters or sewage, for coagulating blood in slaughterhouses, …

Section VI > Chapter 28 > Heading 2827

Explanatory notes

… Colourless when pure, otherwise yellowish; soluble in water. Its uses include the pickling of metals, in the … or prisms, or hydrated in colourless needles. Soluble in water. Used in the manufacture of very hard cement (e.g., … or garnet‑coloured masses, deliquescent and soluble in water, or hydrated (with 5 or 12 H 2 O) in orange‑coloured, …

Section VI > Chapter 28 > Heading 2835

Explanatory notes

… acid (H 3 PO 2 ) (heading 28.11). These are soluble in water and decompose on heating with evolution of hydrogen … those of ammonium, sodium, potassium or calcium, soluble in water and acting as reducing agents. (C) PHOSPHATES AND … water, releasing part of their water of crystallisation on warming. Used as a flux for dissolving metal oxides, in …

Section XVI > Chapter 84 > Heading 8445

Explanatory notes

… into yarns, twine, etc. or    (ii)  Manufacturing into wadding, felt, stuffing material, etc. (II)  The working up … arrangements for feeding in the wool and pumping in hot water; and raw wool washing machines ( e.g., Leviathans ) …

Section XVI > Chapter 84 > Heading 8401

Explanatory notes

… the neutron reflector (e.g., beryllium, graphite, water, heavy water, certain hydrocarbons such as diphenyl or terphenyls). … and cermets. These are flanged or fitted in the same way as the fuel elements (cartridges) described in (1) …

Section XVI > Chapter 84 > Heading 8404

Explanatory notes

… include : (1)   Economisers for pre-heating the boiler feed water by utilising the waste heat of the flue gases or, in some types, exhaust … the surplus heat from steam boilers. (8)    Tubular furnace-walls , i.e., a system of vertical tubing connected to …

Section XVI > Chapter 84 > Heading 8428

Explanatory notes

… belt type 8428.39 ‑ ‑ Other 8428.40 ‑ Escalators and moving walkways 8428.60 ‑ Teleferics, chair‑lifts, ski‑draglines; … usually operated by winch and cable, or by rams worked by water, air or oil. They are used for raising or lowering a … ( heading 73.02 or 86.08 according to type). (F)         Wagon tippers are platforms with guide rails or grooves, so …

Section XI > Chapter 57 > Heading 5702

Explanatory notes

…        The surface of these carpets is formed by additional warp threads which are made to form loops on the right side … yarns may be used as an additional weft woven in the normal way; in some cases short pieces of chenille yarn are … with a warp of jute yarn and a weft made of strips of waste fabric tied end to end. (5)   Door mats and matting . …

Section XI > Chapter 58 > Heading 5804

Explanatory notes

… linen. (A)  Tulle and other bobbin‑net fabrics consist of warp threads with weft threads which twist round each warp … net). Each mesh thread runs alternately alongside different warps forming square meshes as it passes from one to the … (4) Macramé lace , a heavy lace made by knotting in various ways a series of threads fixed at right angles to a leading …

Section VI > Chapter 29 > Heading 2936

Explanatory notes

… -     by coating with appropriate substance (e.g., gelatin, waxes or fats), whether or not plasticised, or -     by … flakes which become yellow on exposure to air; insoluble in water but soluble in alcohol and benzene. (2)   … of the manufacture of lecithin. Platelets insoluble in water but soluble in organic solvents. (3)   Non-irradiated …