WCO Explanatory Notes reproduced for reference. © World Customs Organization. Verify against official WCO publication.
28.47 - Hydrogen peroxide, whether or not solidified with urea. Hydrogen peroxide (HzOz) is obtained by electrolytic oxidation of sulphuric acid followed by distillation, or by treatin barium or sodium erox~deor potassium persulphate with an acid. It is a colourless liquid wik the appearance o ordinary water. It may have a syrupy consistency and corrodes the skin when concentrated. It is transported in carboys. ? Hydrogen peroxide is very unstable in an alkaline medium, especially when exposed to heat or light. It nearly always contains small amounts of stabilisers (boric or citric acid, etc.) to prevent decomposition; such mixtures remain in this heading. This heading also includes hydrogen peroxide, solidified with urea, whether or not stabilised. Hydrogen eroxide is used for bleaching textiles, feathers, straw, sponges, ivory, hair, etc. It is also used or vat-dyeing, for urifying water, for restoring old pictures, in photography and in medicine (as an antiseptic an haemostat). ? Presented as a medicament in measured doses or in forms or packings for retail sale, hydrogen peroxide falls in heading 30.04.
1.- Except where the context otherwise requires, the headings of this Chapter apply only to : (a) Separate chemical elements and separate chemically defined compounds, whether or not containing impurities; (b) The products mentioned in (a) above dissolved in water; (c) The products mentioned in (a) above dissolved in other solvents provided that the solution constitutes a normal and necessary method of putting up these products adopted solely for reasons of safety or for transport and that the solvent does not render the product particularly suitable for specific use rather than for general use; (d) The products mentioned in (a), (b) or (c) above with an added stabiliser (including an anti-caking agent) necessary for their preservation or transport; (e) The products mentioned in (a), (b), (c) or (d) above with an added anti-dusting agent or a colouring substance added to facilitate their identification or for safety reasons, provided that the additions do not render the product particularly suitable for specific use rather than for general use.