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SITCSection 2
U.S. exports of isoprene rubber (ir) in primary forms (SITC 23216) totaled $5.2M in July 2026.
Importers of Isoprene Rubber (IR) in Primary Forms paid $416K in duties in July 2026 — an effective duty rate of 18% on $2.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Isoprene Rubber (IR) in Primary Forms imports of $2.5M in July 2026 ran 46% above the year-to-date monthly average of $1.7M.
Last updated: July 2026 dataSynthetic isoprene rubber (IR) is the closest synthetic analog to natural rubber, sharing the same cis-1,4-polyisoprene structure and offering a consistent, latex-free alternative for applications where natural rubber's biological variability or protein allergen content is a concern. IR is used in medical devices, adhesives, and high-performance tire compounds where batch-to-batch consistency is valued over the cost advantage of natural rubber. Because IR competes directly with natural rubber on a technical basis, its import volumes tend to be sensitive to natural rubber price cycles and supply disruptions from Southeast Asian growing regions.
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27 shipments/mo
Basic heading 108 of 239 in section 2
Basic heading 23216 · $2.5M of $3.8B
From a customs classification standpoint, IR and natural rubber are distinct materials and classify under different headings. However, in many compounding applications they are technically interchangeable, and finished goods made from IR may carry the same end-use classification as those made from natural rubber. Importers should document the polymer type clearly to support accurate classification of both the raw material and any downstream articles.
Natural rubber latex contains proteins that can trigger Type I hypersensitivity reactions in sensitized patients. Synthetic IR, being protein-free, eliminates this allergen risk while maintaining comparable mechanical properties. This makes IR a preferred material for pharmaceutical stoppers, syringe plungers, and medical tubing where latex-free certification is required.
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Exports · July 2026
destination
Mexico and Canada together take 57% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$2.5MYoY · Pro
Exports
$5.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.