APFOS Stabilized Flake Form
> Ammonium perfluorooctane sulphonate in flake form with a stabilizer added to ensure safe transport and preservation. Chapter 29 Note 1(f) allows the addition of stabilizers necessary for preservation or transport without altering the classification. The flakes remain a chemically defined organic compound under tariff item 2904.32.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the stabilizer is added to the acid form rather than the ammonium salt
The acid and salt forms are classified under different tariff items.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• > Identify the stabilizer on the product documentation and confirm it is required for safe transport
• Keep shipping records showing the stabilizer's purpose
• Ensure the product's chemical identity as ammonium perfluorooctane sulphonate is clearly stated for CBSA classification
Related Products under Tariff item 2904.32.00
Ammonium Perfluorooctane Sulfonate (APFOS) Powder
> Pure ammonium perfluorooctane sulphonate (APFOS) in powder form, a chemically defined organic compound. It is a sulphonated, halogenated derivative of a hydrocarbon, falling squarely within the scope of heading 29.04 and specifically tariff item 2904.32.00. The powder contains no added stabilizers or anti-dusting agents.
Ammonium Perfluorooctane Sulfonate Aqueous Solution 50%
> An aqueous solution containing 50% ammonium perfluorooctane sulphonate (APFOS) and 50% water. It is a separate chemically defined organic compound dissolved in water, which is permitted under Chapter 29 Note 1(d) of the Customs Tariff. The water acts solely as a solvent and does not make the product suitable for a specific use, so it remains classified under tariff item 2904.32.00.
APFOS Anti-Dusting Granules
> Granular ammonium perfluorooctane sulphonate treated with an anti-dusting agent to improve handling safety. Chapter 29 Note 1(g) permits the addition of anti-dusting agents to otherwise classifiable compounds, provided the addition does not make the product suitable for a specific use. The granules remain classifiable under tariff item 2904.32.00.
High Purity APFOS for Firefighting Foam Production
> Ultra-high purity ammonium perfluorooctane sulphonate intended for use in producing aqueous film-forming foam (AFFF) concentrates. Although the end-use is specific, the product itself is a separate chemically defined organic compound and remains classifiable under tariff item 2904.32.00. End-use does not affect the classification of a pure compound under Chapter 29.
Technical Grade Ammonium Perfluorooctane Sulfonate 98%
> Technical grade ammonium perfluorooctane sulphonate with a purity of 98%, containing minor impurities. Chapter 29 Note 1(a) allows separate chemically defined organic compounds whether or not they contain impurities. The product is therefore classifiable under tariff item 2904.32.00 despite the presence of impurities.