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