Harmonized System
Section VI > Chapter 29 > Heading 2909
Explanatory notes
… the hydrogen atom of the hydroxyl group is replaced by a hydrocarbon radical (alkyl or aryl). They have the general … (R-O-R 1 ), where R and R 1 may be the same or different. These ethers are very stable, neutral substances. If the … ether . (14) Benzyl ethyl ether . (B) ETHER-ALCOHOLS These are derived from polyhydric alcohols or …Section VI > Chapter 28 > Heading 2835
… Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; …
Explanatory notes
… 28.35 ‑ Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; … phosphinates (hypophosphites), metal salts of phosphinic (hypophosphorous) acid (H 3 PO 2 ) (heading 28.11). These are soluble in water and decompose on heating with …Section VI > Chapter 30 > Heading 3006
Explanatory notes
… or on spermicides 3006.70 - Gel preparations designed to be used in human or veterinary medicine as a lubricant for parts of the body for surgical operations or physical examinations or as a coupling agent between the … lubricant for parts of the body for surgical operations or physical examinations or as a coupling agent between the …Section XVI > Chapter 84 > Heading 8401
Explanatory notes
… (e.g., beryllium, graphite, water, heavy water, certain hydrocarbons such as diphenyl or terphenyls). (3) The coolant . This serves to remove the heat generated by the reactor (carbon … which, by low-temperature fractional distillation of liquid hydrogen, separates the deuterium, which can then be …Section VI > Chapter 29 > Heading 2915
… Saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their …
Explanatory notes
… the heading also covers the ortho-acids (RC(OH) 3 ) since these may be regarded as hydrated carboxylic acids (RCOOH + H 2 O = RC(OH) 3 ). In … acids or polycarboxylic acids, respectively). If the hydroxyl group (–OH) is removed, the residue is an acyl …Section VI > Chapter 28 > Heading 2825
… Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. …
Explanatory notes
… 28.25 ‑ Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. 2825.10 ‑ Hydrazine and … is used as a reagent in analysis, and in metallurgy (to separate polonium from tellurium). …Section VI > Chapter 28 > Heading 2811
Explanatory notes
… silicates and of fluorosilicic acid as impurities). In the anhydrous state, hydrogen fluoride is an extremely hygroscopic liquid (boiling point 18/20 °C); it fumes in a … manufacture of synthetic dyes. (F) SELENIUM COMPOUNDS (1) Hydrogen selenide (H 2 Se). A nauseous gas, dangerous to …Section VI > Chapter 29 > Heading 2936
… (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the …