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SITCSection 5
U.S. imports of polymers of vinyl chloride or other halogenated olefins (n.e.s.), primary forms (SITC 57399) totaled $950K in April 2026, traded with 15 countries.
Importers of Polymers of Vinyl Chloride or Other Halogenated Olefins (N.E.S.), Primary Forms paid $152K in duties in April 2026 — an effective duty rate of 16% on $953K in dutiable value, based on actual customs collections rather than the published tariff schedule. Polymers of Vinyl Chloride or Other Halogenated Olefins (N.E.S.), Primary Forms imports of $950K in April 2026 ran 30% below the year-to-date monthly average of $1.3M.
Last updated: April 2026 dataResidual halogenated olefin polymers not captured by the named vinyl chloride, vinylidene chloride, or fluoropolymer headings fall here — a category that can include chlorinated polyethylene, polychloroprene precursors in primary form, and other specialty halogenated resins. Correct classification requires ruling out all more-specific headings first, making detailed chemical documentation essential. These materials serve niche roles in flame-retardant compounding, specialty elastomers, and chemical-resistant coatings.
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Importers should provide a certificate of analysis identifying the monomer units, halogen type, and weight percentages, along with a written explanation of why the product does not qualify under the named headings for vinyl chloride–vinyl acetate copolymers, vinylidene chloride polymers, or fluoropolymers. A binding ruling from CBP can provide long-term classification certainty for recurring shipments.
Chlorinated polyethylene is a halogenated olefin polymer, but its classification depends on whether it is considered a chemically modified polyethylene (which would place it under polyethylene headings) or a distinct halogenated olefin polymer. This is a recognized classification gray area, and a licensed customs broker or CBP ruling is advisable before importation.
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Monthly import values over time