Harmonized System

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Section VI > Chapter 29 > Heading 2933

Section VI > Chapter 29 > Heading 2909

Section VI > Chapter 29 > Heading 2936

Explanatory notes

… active substances which constitute a group of compounds of fairly complex chemical composition, essential for the … the human body and must therefore be obtained in final or nearly final form (provitamins) from outside sources. They … (3)   Thiamine mononitrate . White crystalline powder, fairly stable. (4)   Thiamine-1,5-salt (aneurine-1,5-salt, …

Section VI > Chapter 29 > Heading 2922

Section VI > Chapter 29 > Heading 2921

Section VI > Chapter 28 > Heading 2829

Explanatory notes

… electrolysing an aqueous solution of sodium chloride. Shiny colourless crystals (tablets); very soluble in water; … (KClO 3 ). Prepared in a similar manner to sodium chlorate. Colourless crystals, sparingly soluble in water. Its other …

Section VI > Chapter 29 > Heading 2916

Explanatory notes

… AND OTHER DERIVATIVES (1)   Acrylic acid (CH 2 =CHCOOH) * . Colourless liquid with acrid odour. Polymerises readily; … (C 18 H 34 O 2 ). Found in fats and oils as a glyceride. A colourless odourless liquid; crystallises in needles at a …

Section VI > Chapter 28 > Heading 2832

Explanatory notes

… sulphur dioxide on an aqueous solution of sodium carbonate. Colourless powder or crystals, rather unstable, with a smell … Anhydrous (in powder) or crystallised (with 7 H 2 O) colourless, soluble in water. Used in photography, in …

Section VI > Chapter 28 > Heading 2826

Section VI > Chapter 29 > Heading 2931