Harmonized System

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Section VI > Chapter 29 > Heading 2912

Explanatory notes

… Saturated acyclic aldehydes . (1) Methanal (formaldehyde) (HCHO). Obtained by catalytic oxidation of methanol. … (1) Propenal (acrylaldehyde, acraldehyde, acrolein) (CH 2 =CHCHO). Formed when fatty matter is burned; a liquid with a … organic synthesis. (2) 2‑Butenal (crotonaldehyde) (CH 3 CH=CHCHO). Found in the first distillation products of crude …

Section VI > Chapter 28 > Heading 2811

Explanatory notes

… as a rule, unstable. They include : (1) Hypochlorous acid (HClO). A product dangerous to inhale, exploding on contact … yellow or occasionally reddish. (2)   Chloric acid (HClO 3 ). This acid exists only as colourless or yellowish … (3)   Hydrogen cyanide (hydrocyanic acid, prussic acid) (HCN). Obtained by the action of sulphuric acid on a cyanide, …

Section VI > Chapter 28 > Heading 2812

Explanatory notes

… 1.5. Liberates suffocating white fumes (hydrogen chloride (HCl)) in the presence of atmospheric moisture. Decomposes in … water with formation of gelatinous silica and liberation of HCl fumes. Used for preparing silica and very pure silicon, … products of hydrogen silicides, such as trichlorosilane (SiHCl 3 ) are excluded ( heading 28.53 ). The heading does not …

Section VI > Chapter 28 > Heading 2829

Explanatory notes

… (A) CHLORATES This group covers the salts of chloric acid (HClO 3 ) (heading 28.11). (1)   Sodium chlorate (NaClO 3 ). … This group covers the salts of perchloric acid (HClO 4 ) (heading 28.11). These powerful oxidising agents …

Section VI > Chapter 29 > Heading 2916

Explanatory notes

… ESTERS AND OTHER DERIVATIVES (1)   Acrylic acid (CH 2 =CHCOOH) * . Colourless liquid with acrid odour. Polymerises … ESTERS AND OTHER DERIVATIVES Cinnamic acid (C 6 H 5 CH=CHCOOH). Found in cinnamon oil and in balsams of Tolu and …

Section VI > Chapter 29 > Heading 2905

Explanatory notes

… or nitrosated derivatives of acyclic alcohols : 2905.51 - - Ethchlorvynol (INN) 2905.59 - - Other Acyclic alcohols are … alcohol ; used in medicine. (3)         Ethchlorvynol . A psychotropic substance - see the list at …

Section VI > Chapter 28 > Heading 2853

Explanatory notes

… and water; it is a reducing agent. (5)   Trichlorosilane (SiHCl 3 ). Obtained by the reaction of hydrogen chloride (HCl) with silicon, it is used in the manufacture of fumed …

Section VI > Chapter 29 > Heading 2914

Section VI > Chapter 28 > Heading 2843

Explanatory notes

… flasks or tubes. Tetrachloroauric (III) acid (AuCl 3 .HCl.4H 2 O) (yellow chloride) yellow crystals, hydrated, and … oxide (Rh 2 O 3 ) a black powder. The rhodium trichloride (RhCl 3 ), gives chlororhodites with alkali chlorides, and …

Section VI > Chapter 28 > Heading 2836

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