Harmonized System

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Section VI > Chapter 29 > Heading 2921

Section VI > Chapter 28 > Heading 2841

Explanatory notes

… agent in organic synthesis; in photography; in printing; in pyrotechnics; for purifying or decolourising fats; for … of a mixture of natural manganese dioxide (heading 26.02 ‑ pyrolusite) and sodium hydroxide; green crystals, soluble in … (black) are used in the manufacture of matches and in pyrotechnics. (13) Other salts of oxometallic acids or …

Section VII > Chapter 39 > Heading 3907

Section VI > Chapter 29 > Heading 2918

Section VI > Chapter 35 > Heading 3507

Explanatory notes

… molecule called a coenzyme (e.g., thiamine diphosphate in pyruvate decarboxylase, pyridoxal phosphate in glutamine-oxo-acid … 21.02 ). (b)   Coenzymes such as cocarboxylase (aneurine pyrophosphate) and cozymase (nicotinamide-adenine …

Section V > Chapter 27 > Heading 2710

Section VI > Chapter 28 > Heading 2836

Explanatory notes

… enamels; in the rubber, paper, soap or sugar industries; in pyrotechnics (green lights).           Natural barium … is a very fine white powder, insoluble in water. Used in pyrotechnics (red lights) and in the preparation of … against phosphorus poisoning); in electroplating; in pyrotechnics, etc.           Natural copper carbonate, …

Section V > Chapter 26 > Heading 2603

Explanatory notes

… Chalcocite , copper sulphide. (g)   Chalcopyrite (copper pyrites), sulphide of copper and iron. (h)   Chrysocolla , …

Section V > Chapter 26 > Heading 2602

Explanatory notes

… (e)   Psilomelane , hydrated manganese dioxide. (f)   Pyrolusite (or polianite), manganese dioxide. The heading … are excluded ( heading 26.01 ). The heading also excludes pyrolusite prepared for use in dry batteries ( heading 25.30 …

Section XVI > Chapter 84 > Heading 8472