HS Code 290431
Perfluorooctane sulphonic acid
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
Also searched as: PFOS, perfluorooctane sulfonic acid, PFOS acid
Classification
How 290431 breaks down
Organic chemicals
Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
Perfluorooctane sulphonic acid
Covered products
What products fall under HS code 290431?
Buyers sourcing perfluorooctane sulphonic acid from 1688 commonly describe it in these ways. If your product matches, 290431 is likely the right 6-digit starting point — confirm material and intended use against the official tariff.
Import duty by market
Where to check the import duty for HS 290431
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 the real China-origin import tax across markets
Use the HS & import duty checker to estimate duty + VAT/GST for 290431 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 290431 is not an exact match, one of these may classify your product more precisely.
Questions
HS code 290431: common questions
What is HS code 290431?
HS code 290431 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 : Perfluorooctane sulphonic acid". 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 290431?
Common products classified under 290431 include PFOS, perfluorooctane sulfonic acid, PFOS acid and similar items matching perfluorooctane sulphonic acid. The correct code still depends on the product's material, function and intended use.
How do I find the import duty for HS code 290431?
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 290431 the same in every country?
The first 6 digits (290431) 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.
Sourcing perfluorooctane sulphonic acid 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.