… containing an unfused thiazole ring (whether or not hydrogenated) in the structure 2934.20 - Compounds … the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused 2934.30 - Compounds … the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused - Other : …
… METALS GENERAL Metal salts are obtained by replacing the hydrogen element in an acid by a metal or by the ammonium … from non‑metals) or in sub‑Chapter IV (acid‑function metal hydroxides). Double or complex salts. Certain double or … or of mercury ( heading 28.52 ). (d) Phosphides, carbides, hydrides, nitrides, azides , silicides and borides ( …
… CHEMICALLY DEFINED These are : (I) Oxides, peroxides and hydroxides of precious metals , analogous to the compounds … the compounds of sub‑Chapter V. (III) Phosphides, carbides, hydrides, nitrides, silicides and borides , analogous to the …
… may be regarded as di-ethers of (normally hypothetical) hydrates of aldehydes and ketones. Hemiacetals are mono-ethers in which … carbon-atom adjacent to the ether-oxygen atom also bears a hydroxyl group. “Acetals and hemiacetals with other oxygen …
… cyanides. (A) CYANIDES Cyanides are the metal salts of hydrogen cyanide (hydrocyanic acid) (HCN) (heading 28.11). These salts are … Sodium cyanide (NaCN). Obtained by the action of coke or hydrocarbon gases and atmospheric nitrogen on sodium …
… ( heading 38.04 ), and the industrial products known as “hydrosulphites” stabilised by organic substances ( heading … sulphites. (1) Sodium sulphites . These include sodium hydrogen sulphite (NaHSO 3 ), disodium disulphite (Na 2 SO 3 … of the hydrogen sulphite by means of sodium carbonate. Anhydrous (in powder) or crystallised (with 7 H 2 O) …
… dioxide 2820.90 ‑ Other (1) Manganese dioxide (manganous anhydride) (MnO 2 ). The most important manganese oxide. … include pyrotechnics, organic synthesis (preparation of hydroxyanthraquinones, aminoanthraquinones, etc.), in … are derived. This heading does not include the anhydrous natural manganese dioxide (pyrolusite) and …
… of products of heading 29.12. These are derived from aldehydes by replacing one or more of the hydrogen atoms (other than a hydrogen in the aldehyde group …
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