400231 — Synthetic rubber and factice derived from oils, in primary forms or in plates,…: Isobutene-isoprene (butyl) rubber (IIR)
HS code 400231 classifies Synthetic rubber and factice derived from oils, in primary forms or in plates,…: Isobutene-isoprene (butyl) rubber (IIR). It belongs to Chapter 40 (Rubber and articles thereof) of Section VII (Plastics and articles thereof; rubber and articles thereof) of the Harmonized System. Duty rates are recorded for 1 country.
Description
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 : Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or BIIR) : Isobutene-isoprene (butyl) rubber (IIR)
Duty rates
US MFN base rate (HTS 2026, Column-1 General) — excludes Section 301 / IEEPA add-ons; not legal advice. Other countries’ rates and live duties via the EximAgent CLI.
- USUnited States0%MFNas of Jan 1, 2026
Common questions
- What is HS code 400231?
- 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 : Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or…
- What duty rates apply to 400231?
- Listed duty rates range from 0% across 1 country rate.
Browse all of Chapter 40: Rubber and articles thereof →
Go beyond the code
Find verified importers of 400231 — Synthetic rubber and factice derived from oils, in primary forms or in plates,…: Isobutene-isoprene (butyl) rubber (IIR) by country, with live tariff context, OFAC sanctions screening, and ready-to-send outreach — each result confidence-tagged.