2904.32.00.00
Ammonium perfluorooctane sulfonate
Classification path
- Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
- Perfluorooctane sulfonic acid, its salts and perfluorooctane sulfonyl fluoride
- Ammonium perfluorooctane sulfonate
Rates of duty
- General (MFN)
- 3.7%
- Column 2Cuba, North Korea, Russia, Belarus
- 25%
- Unit of quantity
- kg
Trade agreement rates
Related lines in heading 2904
- 2904.10.04.00Derivatives containing only sulfo groups, their salts and ethyl esters / 2-Anthracenesulfonic acid5.5%
- 2904.10.08.00Derivatives containing only sulfo groups, their salts and ethyl esters / Benzenesulfonyl chloride5.5%
- 2904.10.10.00m-Benzenedisulfonic acid, sodium salt; 1,5-Naphthalenedisulfonic acid; andp-Toluenesulfonyl chloride5.5%
- 2904.10.15.00Mixtures of 1,3,6-naphthalenetrisulfonic acid and 1,3,7-naphthalenetrisulfonic acid5.5%
- 2904.10.32.00Products described in additional U.S. note 3 to section VI5.5%
- 2904.10.37.00Derivatives containing only sulfo groups, their salts and ethyl esters / Aromatic / Other5.5%
- 2904.10.50.00Derivatives containing only sulfo groups, their salts and ethyl esters / Other4.2%
- 2904.20.10.00Derivatives containing only nitro or only nitroso groups / p-Nitrotoluene5.5%
- 2904.20.15.00Derivatives containing only nitro or only nitroso groups / p-Nitro-o-xylene5.5%
- 2904.20.20.00Derivatives containing only nitro or only nitroso groups / TrinitrotolueneFree
- 2904.20.30.005-tert-Butyl-2,4,6-trinitro-m-xylene (Musk xylol) and other artificial musks5.5%
- 2904.20.35.00Nitrated benzene, nitrated toluene (except p-nitrotoluene), or nitrated naphthalene5.5%
About heading 2904
Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
Heading 2904 covers sulfonated, nitrated and nitrosated derivatives of hydrocarbons, including halogenated versions of those derivatives. The heading splits first by the type of group added: subheadings 2904.10 for sulfo-only derivatives, 2904.20 for nitro-only or nitroso-only derivatives, 2904.31 through 2904.36 for perfluorooctane sulfonic acid and related compounds, and 2904.91 and 2904.99 for other mixed derivatives. Within each group, named chemical lines come before basket lines that separate aromatic from other products.
Full guide to heading 2904Products in this heading
- p-Nitrotoluene
- Trinitrotoluene (TNT)
- Benzenesulfonyl chloride
- p-Toluenesulfonyl chloride
- Musk xylol and other artificial musks
- o-Nitrochlorobenzene
- Chloropicrin (trichloronitromethane)
- Perfluorooctane sulfonic acid
Frequently asked questions
What is the duty on trinitrotoluene?
Trinitrotoluene is classified under 2904.20.20.00 and the general (MFN) rate is Free.
How do I classify nitrated benzene or nitrated naphthalene?
Nitrated benzene, nitrated toluene other than p-nitrotoluene, and nitrated naphthalene go under 2904.20.35.00 at a general (MFN) rate of 5.5%. Chloropicrin, a nitrated halogenated hydrocarbon with a different structure, goes under 2904.91.00.00 at 3.7%.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.