High-Purity Isoprene (99.5%) from Japan
Isoprene (2-methyl-1,3-butadiene) with a purity of 99.5% by weight, a chemically defined acyclic unsaturated hydrocarbon used primarily as a monomer in synthetic rubber production. It falls under HTS 2901.24.20.00 due to its high purity exceeding 95% and classification as pure isoprene per Chapter 29 notes for separate organic compounds. This excludes mixtures or impure forms covered elsewhere.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide third-party lab analysis certificates verifying ≥95% purity by weight to avoid reclassification; declare exact purity percentage on entry documents
• Common pitfall: contamination during transport dropping below threshold—use inert atmosphere packaging