Harmonized System
Section VI > Chapter 29 > Heading 2909
… ether-phenols, ether-alcohol-phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically …
Explanatory notes
… Sub-Chapter IV ETHERS, ALCOHOL PEROXIDES, ETHER PEROXIDES, ACETAL AND HEMIACETAL PEROXIDES … nitrated or nitrosated derivatives (A) ETHERS Ethers may be considered as alcohols or phenols in which the hydrogen atom of the hydroxyl group is replaced by a …Section XIV > Chapter 71 > Heading 7110
Explanatory notes
… metal, not tarnished at room temperature and resistant to acids except aqua regia. It can be fabricated into bars, … the ammonia-oxidation process for the manufacture of nitric acid or as a platforming catalyst); as chemical apparatus … mainly used for electrical contacts, in brazing alloys, in hydrogen purification equipment, as a hydrogenation …Section VI > Chapter 28 > Heading 2830
… Sulphides; polysulphides, whether or not chemically defined. …
Explanatory notes
… 28.30 ‑ Sulphides; polysulphides, whether or not chemically defined. … sub‑Chapter, this heading covers metal sulphides (salts of hydrogen sulphide (H 2 S) of heading 28.11). The old name “sulphydrates” (hydrosulphides) is sometimes applied to the …Section VI > Chapter 29 > Heading 2932
Explanatory notes
… includes, inter alia : (1) Tetrahydrofuran . Colourless liquid. (2) 2-Furaldehyde (furfural)* . Prepared by distilling cereal bran with sulphuric acid. Colourless liquid with a characteristic aromatic odour; it turns yellow … exposed to air. Reacts vigorously with concentrated mineral acids. Used as a solvent for cellulose nitrate, and for the …Section VI > Chapter 28 > Heading 2804
… Hydrogen, rare gases and other non-metals. …
Explanatory notes
… 28.04 ‑ Hydrogen, rare gases and other non-metals. 2804.10 - … It is used for hydrogenating oils (preparation of solid fats), for cracking petroleum products, in the … a blue light). Rare gases are obtained by fractionating liquid air, or also (in the case of helium) from certain …Section VI > Chapter 28 > Heading 2835
Explanatory notes
… or disodium 2835.24 ‑ ‑ Of potassium 2835.25 ‑ ‑ Calcium hydrogenorthophosphate (“dicalcium phosphate”) 2835.26 ‑ ‑ … metal salts of phosphinic (hypophosphorous) acid (H 3 PO 2 ) (heading 28.11). These are soluble in water … includes phosphonates (phosphites), metal salts (neutral or acid) of phosphonic (phosphorous) acid (H 3 PO 3 ) (heading …Section VI > Chapter 28 > Heading 2843
… Colloidal precious metals; inorganic or organic compounds of …
Explanatory notes
… Sub-Chapter VI MISCELLANEOUS 28.43 ‑ Colloidal precious metals; inorganic or organic compounds of … when put up in colloidal solutions containing protective colloids (such as gelatin, casein, fish glue). (B) INORGANIC … METALS, WHETHER OR NOT CHEMICALLY DEFINED These are : (I) Oxides, peroxides and hydroxides of precious metals , …Section VI > Chapter 28 > Heading 2812
… Halides and halide oxides of non-metals. …