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Isoprene with p-Menthadiene Impurities from Japan

Commercial isoprene containing controlled p-menthadiene impurities from thermal dimerization limits. Still classified as principal isoprene compound per Chapter 29 classification rules. 'Other' category accommodates typical commercial impurity profiles.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

Import Tips

Specify impurity limits in COA (p-menthadiene typically <2%); higher levels risk reclassification

Monitor for auto-polymerization; temperature-controlled shipping prevents solid 'popcorn polymer' formation

Customs may request comparative pricing data vs pure monomer to verify commercial grade status