HS code 290431: Perfluorooctane Sulphonic Acid
- Covers:
- Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not…
- Listed US duty:
- 3.7% (US general rate, HTS 2026)
Official description
Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid
Find or check your HS code
Suggestions from the HS index, not a customs ruling
Describe what you ship: what it is, what it is made of, how it is processed and what it is used for. I narrow it down against the real HS hierarchy, or check a code you were given.
What 290431 covers and what it doesn’t
Official text: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated › Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride › Perfluorooctane sulphonic acid.
Nearby codes to check
- Heading 2904 Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated: every subheading side by side.
- 290410 Derivatives containing only sulpho groups, their salts and ethyl esters
- 290420 Derivatives containing only nitro or only nitroso groups
- 290432 Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride — Ammonium perfluorooctane sulphonate
- 290433 Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride — Lithium perfluorooctane sulphonate
- 290434 Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride — Potassium perfluorooctane sulphonate
- 290435 Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride — Other salts of perfluorooctane sulphonic acid
- 290436 Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride — Perfluorooctane sulphonyl fluoride
- 290491 Trichloronitromethane (chloropicrin)
- 290499 Other
US duty rate
3.7%
General (MFN) rate in the US Harmonized Tariff Schedule, 2026 edition. A range means the rate depends on the 8-digit US line your product falls under. Extra duties such as Section 301, Section 232 or anti-dumping orders can apply on top, depending on origin. Check the lines on hts.usitc.gov. Not legal advice.
Common questions
- What is HS code 290431?
- Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid
- What duty rates apply to 290431?
- Listed duty rates range from 3.7% across 1 country rate.
Browse all of Chapter 29: Organic chemicals →
Go beyond the code
Find the companies shipping under 290431 in the company directory, or classify and check duty with the CLI.