Isoprene with p-Menthadiene Impurities from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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