HS Code 400239

HS code 400239 is the World Customs Organization 6-digit HS 2022 subheading for "Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of any product of heading 4001 with any product of this heading, in primary forms or in plates, sheets or strip : Isobuteneisoprene (butyl) rubber (IIR); haloisobuteneisoprene rubber (CIIR or BIIR) : Other". The first two digits (40) are the chapter — Rubber and articles thereof — and digits 3-4 (4002) are the heading. Countries add further digits (8-10) for their national tariff line.

Common products classified under 400239 include halogenated butyl rubber, CIIR, BIIR, chlorobutyl rubber, bromobutyl rubber and similar items matching isobuteneisoprene. The correct code still depends on the product's material, function and intended use.

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.

The first 6 digits (400239) 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.

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.