Harmonized System

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Section VI > Chapter 29 > Heading 2921

Explanatory notes

… their salts 2921.12 - - 2 -(N,N-Dimethylamino)ethylchloride hydrochloride 2921.13 - - 2-(N,N-Diethylamino)ethylchloride hydrochloride 2921.14 - - 2-(N,N-Diisopropylamino)ethylchloride hydrochloride 2921.19 - - Other - Acyclic polyamines and …

Section VI > Chapter 29 > Heading 2934

Explanatory notes

… 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 : …

Section VI > Chapter 28 > Heading 2826

Explanatory notes

… 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 ( …

Section VI > Chapter 28 > Heading 2843

Explanatory notes

… 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 …

Section VI > Chapter 29 > Heading 2911

Explanatory notes

… 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 …

Section IV > Chapter 22 > Heading 2202 > 2202.9 > 2202.99

Classification opinions

… water, sugar, sorbitol, calcium carbonate, magnesium hydroxide, zinc gluconate, vitamin D3, vegetable gum and …

Section VI > Chapter 28 > Heading 2837

Explanatory notes

… 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 …

Section VI > Chapter 28 > Heading 2832

Explanatory notes

… ( 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) …

Section VI > Chapter 28 > Heading 2820

Explanatory notes

… 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 …

Section VI > Chapter 29 > Heading 2913

Explanatory notes

… 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 …