Harmonized System

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Section VI > Chapter 28 > Heading 2837

Explanatory notes

… ‑ Cyanides and cyanide oxides : 2837.11 ‑ ‑ Of sodium 2837.19 ‑ ‑ Other 2837.20 ‑ Complex cyanides Subject … powder, plates or paste, crystalline, hygroscopic, very soluble in water and with an odour of bitter almonds. When …

Section VI > Chapter 29 > Heading 2915

Explanatory notes

… called the carboxyl group. In theory, the heading also covers the ortho-acids (RC(OH) 3 ) since these may be … carboxyl group (–COOH) by an inorganic cation, for example, sodium, potassium, ammonium. They may be represented by the …

Section VI > Chapter 28 > Heading 2825

Explanatory notes

… a basic product prepared by the oxidation of ammonia with sodium hypochlorite. Also exists as the hydrate (NH 2 .NH 2 … hydrazine sulphate , colourless crystals which are slightly soluble in cold water and decompose violently when heated; … most common of these is cupric hydroxide (Cu(OH) 2 ). Blue solid which, alone or mixed, constitutes a pigment (Bremen …

Section VI > Chapter 28 > Heading 2852

Explanatory notes

… as amorphous masses, as a powder or in white crystals; insoluble in water. Mercurous chloride is used also in … iodide (HgI or Hg 2 I 2 ). Powder, usually amorphous but sometimes crystalline; usually yellow but sometimes greenish …

Section VI > Chapter 28 > Heading 2840

Explanatory notes

… ‑ Borates; peroxoborates (perborates).               ‑ Disodium tetraborate (refined borax) : 2840.11 ‑ ‑ Anhydrous … borax) (Na 2 B 4 O 7 ). Obtained by crystallisation of solutions of natural borates, or by treating natural calcium …

Section VI > Chapter 29 > Heading 2933

Explanatory notes

… . Hygroscopic white crystals; used in medicine as a solvent for uric acid. (C)  Compounds containing an unfused … an important group of pyrimidine compounds. They form water-soluble sodium salts. Both the alkyl-substituted barbituric …

Section VI > Chapter 28 > Heading 2828

Explanatory notes

… is a very powerful oxidising and bleaching agent. (1)   Sodium hypochlorite (NaClO.6H 2 O). Put up in aqueous solutions, is nowadays commercially known as “eau de Javel”. …

Section XVI > Chapter 84 > Heading 8411

Explanatory notes

… combustion engines and do not usually require any external source of heat as does, for example, a steam turbine. (A) … the exhaust jet to provide extra thrust. This version is sometimes called a “bypass fan jet”. So-called …

Section XVIII > Chapter 92 > Heading 9206

Explanatory notes

… stretched over each end (double‑headed drums). They are sounded by striking with one or two plain or leather‑headed … one against the other or by rubbing them together; in some cases, one single cymbal may be sounded by striking with a soft‑headed stick. (2) Gongs (e.g., Chinese gongs), which …

Section VI > Chapter 29 > Heading 2905

Explanatory notes

… 2905.43 - - Mannitol 2905.44 - - D-glucitol (sorbitol) 2905.45 - - Glycerol 2905.49 - - Other … as sulphonated derivatives of alcohols, e.g., acetaldehyde sodium bisulphite, formaldehyde sodium bisulphite, … a characteristic odour; used in organic synthesis, as a solvent, in the dyestuff industry, and for the manufacture …