Isoprene with p-Menthadiene Impurities
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If impurities convert to terpene hydrocarbons
Predominance of cyclic terpenes shifts classification to Chapter 29 unsaturated cyclic hydrocarbons.
If sold as C5 monomer mixture
Commercial mixtures not chemically defined as single compound fall under Chapter 38 preparations.
If butadiene content >10%
Mixtures of butadiene/isoprene classified as 'other acyclic mono-olefins' per statistical notes.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• 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
Related Products under HTS 2901.24.50.00
99% Pure Isoprene Monomer
High-purity isoprene (2-methyl-1,3-butadiene) used as a key monomer in synthetic rubber production. This acyclic unsaturated hydrocarbon falls under HTS 2901.24.50.00 as 'other' isoprene not specified elsewhere in the isoprene subheading. It meets Chapter 29 requirements for separate chemically defined organic compounds.
Research-Grade Isoprene (98% purity)
Laboratory reagent grade isoprene packaged in 100g glass ampoules for chemical synthesis research. Meets Chapter 29(a) definition of separate chemically defined compound with controlled impurities. Falls specifically under 2901.24.50.00 as 'other' isoprene form.
Stabilized Isoprene for Synthetic Rubber
Polymerization-grade isoprene containing TBHP stabilizer to prevent premature polymerization during storage and transport. Classified under HTS 2901.24.50.00 per Chapter 29 note (f) allowing stabilizers necessary for preservation. Remains chemically defined isoprene despite added stabilizer.
Industrial Isoprene from C5 Raffinate
Extracted isoprene from C5 petroleum cracker stream, 95-97% purity for polyisoprene rubber production. Qualifies as chemically defined organic compound per Chapter 29(a) despite raffinate origin. 'Other' form under HTS 2901.24.50.00 excludes high-purity monomer specs.