Harmonized System
Section VI > Chapter 29 > Heading 2904
Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated.
Section VI > Chapter 29 > Heading 2904 > 2904.3
Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride
Section VI > Chapter 29 > Heading 2904 > 2904.10
Derivatives containing only sulpho groups, their salts and ethyl esters
Section VI > Chapter 29 > Heading 2904 > 2904.20
Derivatives containing only nitro or only nitroso groups
Section VI > Chapter 29 > Heading 2904 > 2904.3 > 2904.31
Perfluorooctane sulphonic acid
Section VI > Chapter 29 > Heading 2904 > 2904.3 > 2904.32
Ammonium perfluorooctane sulphonate
Section VI > Chapter 29 > Heading 2904 > 2904.3 > 2904.33
Lithium perfluorooctane sulphonate
Section VI > Chapter 29 > Heading 2904 > 2904.3 > 2904.34
Potassium perfluorooctane sulphonate