HS Code 290432
6-digit classification for Ammonium Perfluorooctane Sulphonate, with duty lookup and 1688 checks before payment
Official description: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Ammonium perfluorooctane sulphonate
Also searched as: ammonium PFOS, ammonium perfluorooctanesulfonate, PFOS ammonium salt
Classification
How 290432 breaks down
Organic chemicals
Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
Ammonium perfluorooctane sulphonate
Short answer
What HS code 290432 means before paying a 1688 supplier
HS code 290432 is the 6-digit HS 2022 starting point for ammonium perfluorooctane sulphonate; often searched as ammonium PFOS, ammonium perfluorooctanesulfonate, PFOS ammonium salt. Before using it in a landed-cost estimate, confirm the product material, function, destination market, and the official tariff source. Treat any 1688 supplier code as a clue, not the final import classification.
Use
Start with this 6-digit HS code and compare the product's material, function, and use.
Verify
Check the destination market's official HTS, TARIC, commodity-code, duty, VAT, or GST source.
Decide
If classification, documents, or restricted-product risk is unclear, submit the product for a written check.
Covered products
What products fall under HS code 290432?
Buyers sourcing ammonium perfluorooctane sulphonate from 1688 commonly describe it in these ways. If your product matches, 290432 is likely the right 6-digit starting point — confirm material and intended use against the official tariff.
US import duty · China origin
US import duty for HS 290432
Published USITC HTS rates for ammonium perfluorooctane sulphonate (290432), aggregated at the 6-digit level. A research estimate — the final rate depends on your full 8-10 digit HTS line.
Base MFN rate
3.7%
From the US national tariff line under 290432.
Section 301 (China)
+25%
Covered lines under this code carry a Section 301 China surcharge.
Effective China-origin
≈28.7%
Base rate with applicable 301 surcharges — before MPF/HMF and any trade-action changes.
Source: USITC HTS (base MFN) + Section 301 overlay · data as of 2026-07-05 · rates change with trade actions — always confirm your full 10-digit line on hts.usitc.gov before pricing a product. Other markets (EU/UK/CA/AU/SG) below.
Import duty by market
Where to check the import duty for HS 290432
The 6-digit code is universal, but duty, VAT and GST are set by the destination country and depend on the full national tariff line with China as the country of origin. Start from the official source for your market.
United States
USITC / CBP · Harmonized Tariff Schedule (HTS)
European Union
TARIC · Access2Markets
United Kingdom
HMRC · UK Integrated Online Tariff
Canada
CBSA · Canadian Customs Tariff
Australia
ABF · Australian customs tariff
Singapore
Singapore Customs · Singapore Trade Classification (HS)
Compare China-origin duty evidence across supported markets
Use the HS & import duty checker to estimate duty + VAT/GST for 290432 by destination before you pay a 1688 supplier.
Heading 2904
Other HS codes under 2904
Subheadings in the same 4-digit heading — "Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated". If 290432 is not an exact match, one of these may classify your product more precisely.
Questions
HS code 290432: common questions
What is the US import duty for HS code 290432 from China?
As published in the USITC HTS (data as of 2026-07-05), the base MFN rate for 290432 averages about 3.7%, and Section 301 China surcharges apply on covered lines (up to +25%), bringing the effective China-origin rate to roughly 28.7%. This is a research estimate — the final rate depends on your full 8-10 digit HTS line; verify on hts.usitc.gov.
What is HS code 290432?
HS code 290432 is the World Customs Organization 6-digit HS 2022 subheading for "Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Ammonium perfluorooctane sulphonate". The first two digits (29) are the chapter — Organic chemicals — and digits 3-4 (2904) are the heading. Countries add further digits (8-10) for their national tariff line.
What products fall under HS 290432?
Common products classified under 290432 include ammonium PFOS, ammonium perfluorooctanesulfonate, PFOS ammonium salt and similar items matching ammonium perfluorooctane sulphonate. The correct code still depends on the product's material, function and intended use.
How do I find the import duty for HS code 290432?
Duty is set by the destination country, not by the 6-digit HS code alone. Start from the official tariff of your market — USITC HTS (US), TARIC / Access2Markets (EU), GOV.UK Trade Tariff (UK), CBSA (Canada), ABF (Australia) or Singapore Customs — and look up the full national code with China as the country of origin.
Is HS code 290432 the same in every country?
The first 6 digits (290432) are the same worldwide under the WCO Harmonized System. Beyond that, each country extends the code (HTS in the US, TARIC in the EU, etc.) and sets its own duty and tax rates.
Can I trust the HS code a 1688 supplier gives me?
Treat a supplier-provided code as a clue, not a final classification. It can be incomplete, China-export-specific, or mismatched to your destination's rules. Verify against the official tariff and your product's actual material and use.
Is HSN code 290432 the same as HS code 290432?
Yes at the 6-digit level. India's HSN (Harmonized System of Nomenclature) uses the same WCO base, so HSN 290432 covers the same "ammonium perfluorooctane sulphonate" scope; India then extends it to 8 digits for GST and customs. Check the Indian Customs tariff (CBIC) for the full national line.
Sourcing ammonium perfluorooctane sulphonate from 1688?
Get a written pre-payment check — classification clues, China-origin landed cost, and supplier risk — before you commit. 5,754 HS codes covered.