… action of sulphuric acid on natural calcium fluoride (fluorite) or on cryolite. It is purified by treatment with … containers; the very pure acid is kept in silver flasks. Its uses include etching on glass, manufacturing ashless …
… other wireless networks : 8517.11 - - Line telephone sets with cordless handsets 8517.13 - - Smartphones 8517.14 - - … switching device or “ switchhook ”, which interrupts or permits the flow of current from the network. It is usually …
… containing these products. 2844.10 ‑ Natural uranium and its compounds; alloys, dispersions (including cermets), … of 75.4 % chlorine 35 and 24.6 % chlorine 37 (which gives it its atomic weight of 35.457). When an element is composed …
… and hydroxylamine and their inorganic salts 2825.20 ‑ Lithium oxide and hydroxide 2825.30 ‑ Vanadium oxides and … The most important products are : (1) Hydrazine and its inorganic salts . Hydrazine (NH 2 .NH 2 ), a basic …
… and dichromates; peroxochromates - Manganites, manganates and permanganates : 2841.61 ‑ ‑ Potassium … dust and vapours attack the nasal bone and cartilages; its solutions infect scratches. Potassium chromate and …
… - Non‑agglomerated metal carbides mixed together or with metallic binders 3824.40 - Prepared additives for … 3824.87 - - Containing perfluorooctane sulphonic acid, its salts, perfluorooctane sulphonamides, or perfluorooctane … or substances are valued for their nutritional content itself. These products generally fall in heading 21.06 . …
… tends to coagulate spontaneously a few hours after tapping; it must therefore be stabilised in order to ensure … excellent electrical insulation properties (because of its low content of proteins and soluble substances). Natural …
… crystals, efflorescing in the air and dissolving in water with a fall in temperature. The decahydrate (Na 2 SO 4 .10H 2 … of the solution employed; on gentle heating it melts in its water of crystallisation, giving finally the anhydrous …
… which is classified under heading 26.17 except when it is in the form of a precious stone (e.g., emerald) ( … of beryllium. This heading covers beryllium in all its forms, i.e., unwrought metal (in blocks, pellets, cubes, …
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