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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contains >70% antioxidants by weight
High antioxidant content classifies as rubber accelerator preparation under Chapter 38 rather than stabilized monomer.
If predominantly saturated hydrocarbons
Presence of saturants changes from unsaturated acyclic hydrocarbon classification.
If imported as chemical mixture for rubber processing
Non-principal mixtures prepared for specific rubber industry use fall under Chapter 38 chemical preparations.
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Import Tips & Compliance
• Document stabilizer type/concentration (typically <0.1% TBHP); exceeds limits may trigger Chapter 38 mixed preparations
• Include Material Safety Data Sheet (MSDS) specifying stabilizer doesn't render product for specific use per Chapter note (g)
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.
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.
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.