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SITCSection 5
U.S. imports of polycarboxylic acids & derivatives, nes (SITC 51389) totaled $93.2M in July 2026, traded with 31 countries.
Importers of Polycarboxylic Acids & Derivatives, NES paid $7.8M in duties in July 2026 — an effective duty rate of 14% on $54.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Polycarboxylic Acids & Derivatives, NES imports of $93.2M in July 2026 ran 13% above the year-to-date monthly average of $82.7M.
Last updated: July 2026 dataA residual catch-all for polycarboxylic acids and their anhydrides, halides, peroxides, peroxyacids, and halogenated or sulfonated derivatives not classified elsewhere, this heading captures a wide range of specialty and fine-chemical intermediates. Correct classification here depends on confirming that the product does not belong to a more specific SITC heading — a determination that often requires the CAS number, structural formula, and a review of adjacent headings covering aromatic, alicyclic, and named acids. Trade professionals importing novel or multi-functional acid derivatives should consider requesting a binding ruling to lock in classification before commercial volumes arrive.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
902 shipments/mo
Basic heading 37 of 465 in section 5
Basic heading 51389 · $93.2M of $28.9B
Start by checking whether the product matches any named heading — phthalic anhydride, dioctyl orthophthalates, dimethyl terephthalate, or the cyclanic acids group. If none applies, verify with a licensed customs broker or through a CBP binding ruling, providing the CAS number, structural formula, and intended use. Misclassification into or out of an NES heading is a frequent source of post-entry audits.
Certain halogenated acid derivatives may be subject to EPA Toxic Substances Control Act (TSCA) import certification requirements, obligating importers to certify that the substance either complies with TSCA or is not subject to it. Importers should review the TSCA inventory status of the specific compound before shipment.
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Imports · July 2026
origin
Mexico and Korea, South together supply 50% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$93.2MYoY · Pro
Exports
$51.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.