Harmonized System

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Section VI > Chapter 38 > Heading 3825

Explanatory notes

… the manufacture of ammonium salts (particularly ammonium sulphate) and purified and concentrated aqueous solutions of … This mass removes from the gas certain impurities (hydrogen sulphide, hydrocyanic acid, etc.). When spent, it contains a mixture of sulphur, Prussian blue, a small quantity of ammonium salts …

Section VI > Chapter 28 > Heading 2836

Explanatory notes

… . Obtained by heating a mixture of chalk and ammonium sulphate (or chloride), or by combining carbon dioxide with … which, in addition to various impurities (chlorides, sulphates, organic matter), contains ammonium hydrogen …

Section VI > Chapter 38 > Heading 3811

Explanatory notes

… are based on phenolic products (e.g., dimethyl‑ tert ‑butylphenol), and such derivatives of aromatic amines as …

Section VI > Chapter 28 > Heading 2825

Explanatory notes

… are also classified here. The most important is hydrazine sulphate , colourless crystals which are slightly soluble in cold water and decompose violently when heated; this sulphate is used as a reagent in analysis, and in metallurgy … heading. The most important are hydroxyammonium chloride , sulphates and nitrate, white or colourless crystals soluble …

Section VI > Chapter 38 > Heading 3803

Explanatory notes

… the black liquor left over from the manufacture of wood pulp by an alkali process or, more particularly, by the sulphate process. When this liquor is poured into … frothy mass is heated and acidified, usually with dilute sulphuric acid. Crude tall oil is a dark brown, semi‑fluid …

Section VI > Chapter 31 > Heading 3102

Explanatory notes

… whether or not in aqueous solution               - Ammonium sulphate; double salts and mixtures of ammonium sulphate and ammonium nitrate : 3102.21 - - Ammonium sulphate 3102.29 - - Other 3102.30 - Ammonium nitrate, …

Section VI > Chapter 28 > Heading 2841

Section VI > Chapter 37 > Heading 3707

Explanatory notes

… of the image (e.g., potassium dichromate, ammonium persulphate).           It should be noted, however, that … Toners to modify the colour of the image (e.g., sodium sulphide). (6)   Clearing agents to remove stains caused …

Section VI > Chapter 32 > Heading 3204

Explanatory notes

… which have no dyeing properties (e.g., anhydrous sodium sulphate, sodium chloride, dextrin, starch) to decrease or …

Section VI > Chapter 29 > Heading 2922

Explanatory notes

… 2922.16 - - Diethanolammonium perfluorooctane sulphonate 2922.17 - - Methyldiethanolamine and … finishing fabrics. (4)   Diethanolammonium perfluorooctane sulphonate . An ammonium salt of perfluorooctane sulfonate …