Harmonized System

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Section VI > Chapter 29 > Heading 2937

Section VI > Chapter 28 > Heading 2836

Explanatory notes

… (percarbonates), i.e., carbonates containing an excess of oxygen, such as (Na 2 CO 4 ) (peroxomonocarbonates) or (Na 2 … carbon dioxide. White powders, dissolving in water to form oxygen and neutral sodium carbonate. Used for bleaching, in …

Section VI > Chapter 29 > Heading 2939

Explanatory notes

… ). This heading includes hydrogenated, dehydrogenated, oxygenated and deoxygenated alkaloid derivatives and, in general, any …

Section VI > Chapter 38 > Heading 3824

Section V > Chapter 25 > Heading 2525

Explanatory notes

… and trimmed books. The sheets take the shape of irregular polygons, like the crystals from which they were obtained, … they have been rifted, they have the shape of irregular polygons. Their edges are roughly trimmed. They are marketed …

Section VI > Chapter 28 > Heading 2816

Explanatory notes

… calcining precipitated strontium carbonate. Porous white, hygroscopic powder, soluble in water. Forms the carbonate … Strontium peroxide (SrO 2 ). Prepared by the action of oxygen on strontium oxide. White powder, decomposed by hot …

Section XVIII > Chapter 90 > Heading 9020

Explanatory notes

… (where the breathing circuit is fed from a cylinder of oxygen or compressed air) or may be connected by a hose to … ). (d)   Divers’ respiratory masks of a kind used without oxygen or compressed air bottles, and simple underwater …

Section VI > Chapter 28 > Heading 2821

Explanatory notes

… salt. White solid which discolours in the presence of oxygen, turning into ferric hydroxide. (2)   Ferric …        It is an amphoteric hydroxide which, after oxygenation, gives the ferrates of heading 28.41. This …

Section VI > Chapter 29 > Heading 2938

Explanatory notes

… the buckwheat plant ( Fagopyrum esculentum Moench. , Polygonaceae ) which contains about 3 % (dry basis). (2) …

Section VI > Chapter 28 > Heading 2840