HS code 2904.33: Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, lithium perfluorooctane sulphonate
Last updated
Key facts
- HS code
- 2904.33
- Covers
- Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, lithium perfluorooctane sulphonate
- Heading
- 29.04: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
- Chapter
- 29: Organic chemicals
- Edition
- HS2022
- Duty in the United States
- See its 1 line
Summary
HS code 2904.33 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, lithium perfluorooctane sulphonate. It sits in heading 29.04 (sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated) in chapter 29 (organic chemicals). Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others. National tariff lines under 2904.33 are live on border.bot for the United States (1 line, also used by 1 other country).
What this code covers
HS code 2904.33 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, lithium perfluorooctane sulphonate.
The legal text of the subheading is “Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Lithium perfluorooctane sulphonate”, read under “Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride”, in HS2022.
What it doesn’t cover
Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others.
- 2904.10Derivatives containing only sulpho groups, their salts and ethyl esters
- 2904.20Derivatives containing only nitro or only nitroso groups
- 2904.31Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Perfluorooctane sulphonic acid
- 2904.32Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Ammonium perfluorooctane sulphonate
- 2904.34Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Potassium perfluorooctane sulphonate
- 2904.35Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Other salts of perfluorooctane sulphonic acid
- 2904.36Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Perfluorooctane sulphonyl fluoride
- 2904.91Other: Trichloronitromethane (chloropicrin)
- 2904.99Other: Other
How it is structured
2904.33 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2904, are heading 29.04; the last two, 33, identify the subheading within the heading.
Countries add their own digits after these six for their national tariff lines.
- Chapter 29
- Organic chemicals
- Heading 29.04
- Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
- Within the heading
- Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride
- Subheading 2904.33
- Lithium perfluorooctane sulphonate
In other countries
National tariff lines under 2904.33 are live on border.bot for the United States (1 line, also used by 1 other country).
- United States1 line, used by 1 other country
Frequently asked questions
What does HS code 2904.33 cover?
HS code 2904.33 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, lithium perfluorooctane sulphonate.
Which heading and chapter is HS code 2904.33 in?
HS code 2904.33 is in heading 29.04 (sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated) in chapter 29 (organic chemicals).
Where are goods of heading 29.04 classified when 2904.33 doesn’t fit?
Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others.
Which countries’ tariffs list national lines under HS code 2904.33?
National tariff lines under 2904.33 are live on border.bot for the United States (1 line, also used by 1 other country).
Sources and updates
The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.
This page was last updated on 11 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.