… - - Other - Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the … - - Other - Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the …
… and are used in medicine or industry because of their individual characteristics. In this Sub-Chapter, the term … B 2 and its derivatives 2936.24 - - D- or DL-Pantothenic acid (Vitamin B 5 ) and its derivatives 2936.25 - - Vitamin … of complex chemical composition, which are obtained from outside sources and are essential for the proper functioning …
… thereof : 2922.21 - - Aminohydroxynaphthalenesulphonic acids and their salts 2922.29 - - Other - … salts thereof 2922.39 - - Other - Amino-acids, other than those containing more than one kind of …
… includes, inter alia : (1) Tetrahydrofuran . Colourless liquid. (2) 2-Furaldehyde (furfural)* . Prepared by distilling cereal bran with sulphuric acid. Colourless liquid with a characteristic aromatic … exposed to air. Reacts vigorously with concentrated mineral acids. Used as a solvent for cellulose nitrate, and for the …
… common compounds of mercury are listed below : (1) Mercury oxides . Mercuric oxide (HgO) is the most important oxide of … paints or mercury salts, and as catalysts. (2) Mercury chlorides . (a) Mercurous chloride (calomel) (Hg 2 Cl 2 ). …
… are instruments for determining the refractive index of liquids or solids (one of the most important constants in … Oxygen meters for the determination of dissolved oxygen in liquids by use of a polarometric cell or by using the … analysers for the determination of the components of liquids, e.g., traces of dissolved metals in water, by …
WCO Trade Tools provides essential information to support your trade activity.
