Harmonized System

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Section VI > Chapter 38 > Heading 3812

Explanatory notes

… or plastics : 3812.31 - - Mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ) 3812.39 - - Other For the purpose of … to vulcanisation to give the vulcanised articles better physical properties and reduce the time and temperature …

Section VI > Chapter 28 > Heading 2846

Explanatory notes

… means that the heading will include mixtures of oxides or hydroxides of these elements or mixtures of salts having … crystals.       Cerium sulphates (cerous sulphate and its hydrates, hydrated ceric sulphate, orange‑yellow prisms …

Section VI > Chapter 28 > Heading 2842

Explanatory notes

… meta‑ and pyroarsenates). The most important are disodium hydrogen orthoarsenate (Na 2 HAsO 4 ) (with 7 or 12 H 2 O, … chloride and ammonium ferric chloride) . In masses or hygroscopic crystals; used in plating and in medicine. (c)   Nickel . Yellow powder or, hydrated, green crystals. Used as a mordant and in …

Section VI > Chapter 34 > Heading 3402

Explanatory notes

… not chemically defined, which contain one or more hydrophilic or hydrophobic functional groups in such a proportion that, … ware, frying-pans, etc., e.g., those containing sodium hydrogen sulphate or a mixture of sodium hypochlorite and …

Section VI > Chapter 28 > Heading 2809

Explanatory notes

… contains as impurities diphosphorus pentaoxide, calcium dihydrogenorthophosphate, sulphur trioxide, sulphuric acid, … acid, etc. Pure phosphoric acid is obtained by controlled hydration of diphosphorus pentaoxide. Phosphoric acid may be … polyphosphoric acids . This part includes, inter alia , hypophosphoric acid (diphosphoric (IV) acid) (H 4 P 2 O 6 ). …

Section VI > Chapter 28 > Heading 2831

Explanatory notes

… 2831.10 ‑ Of sodium 2831.90 ‑ Other Dithionites (hydrosulphites) are the salts of dithionous (“hydrosulphurous”) acid (H 2 S 2 O 4 ) which has not been … are obtained by reducing (with zinc powder) solutions of hydrogen sulphites saturated with sulphur dioxide. They are …

Section VI > Chapter 28 > Heading 2852

Explanatory notes

… and crystalline masses, turning black in the light, or hydrated crystalline flakes (with 1 H 2 O). Used for … . (b)  Diphenylmercury . (c)  Phenylmercury acetate . (16) Hydromercuridibromofluorescein . (17) Mercury compounds, not …

Section VI > Chapter 29 > Heading 2925

Explanatory notes

… and substances, other than a foodstuff, such as sodium hydrogencarbonate (sodium bicarbonate) and tartaric acid … (RCH=NR 1 ) where R and R 1 are alkyl or aryl radicals (methyl, ethyl, phenyl, etc.) or sometimes hydrogen. They …

Section VI > Chapter 28 > Heading 2834

Explanatory notes

… during the manufacture of litharge. Colourless crystals, hygroscopic and very soluble in water. Used as an oxidising … or as a white crystalline powder, soluble in water and hygroscopic when impure. Similar uses to sodium nitrate; … nitric acid gives the anhydrous salt in the warm, and the hydrated salt (with 4 H 2 O) in the cold. Colourless …

Section XVI > Chapter 85 > Heading 8541

Explanatory notes

… rate of less than 1 W 8541.29 ‑ ‑ Other 8541.30 ‑ Thyristors, diacs and triacs, other than photosensitive … transducers, on their semiconductor properties including physical (e.g., mechanical, thermal), electrical, optical … (IV) Other semiconductor devices         They include:  (1) Thyristors , consisting of four conductivity regions in …