… Roux, etc.), burettes of all kinds, evaporating dishes, volumetric flasks, special bell-jars and receivers (vacuum, necked, etc.), special dropping bottles (calibrated, … heading 90.27 for the rules governing the classification of instruments and apparatus for physical or chemical analysis …
… by metals (or by ions with analogous properties, e.g., the ammonium ion (NH 4 + )) as a result salts are formed. Acids … hydroxides and peroxides, such as acids or anhydrides of chromium, molybdenum, tungsten and vanadium). In certain cases, …
… by oxidising ammonia in the presence of a catalyst (platinum, iron, chromium, bismuth or manganese oxides, etc.). Alternatively, … by the action of sulphuric acid (alone or associated with sodium disulphate) on natural sodium nitrate; the impurities …
… connected, by means of flexible tubing, on one side to a vacuum pump unit via a pulsator and on the other to a milk … the various components are usually separate. A variable number of milking pails may be connected to the vacuum pump …
… or not soluble in water), on a base, generally mineral (barium sulphate, calcium sulphate, aluminium oxide, China clay, talc, silica, siliceous fossil …
… as the case may be). (h) Refrigerating machinery and heat pumps of heading 84.18 . (ij) Germination plant, … at reduced or increased pressure may be fitted with vacuum pumps or compressors. Batch stills are mainly used for the …
… are mixtures, the combustion of which produces a large volume of hot gases. These gases generate a propellent … Black powder consists of an intimate mixture of potassium nitrate or sodium nitrate, sulphur and charcoal. This powder, …
WCO Trade Tools provides essential information to support your trade activity.
