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SITCSection 5
U.S. imports of polycarboxylic acids & derivatives, nes (SITC 51389) totaled $82.5M in April 2026, traded with 31 countries.
Importers of Polycarboxylic Acids & Derivatives, NES paid $6.5M in duties in April 2026 — an effective duty rate of 15% on $41.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Polycarboxylic Acids & Derivatives, NES imports of $82.5M in April 2026 ran 23% above the year-to-date monthly average of $67.0M.
Last updated: April 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.
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.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $31.3M | $6.2M | -$25.1M |
| CANADA | $7.3M | $21.8M | +$14.5M |
| CHINA | $10.0M | $1.7M | -$8.3M |
| SPAIN | $9.8M | $1.0M | -$8.8M |
| KOREA, SOUTH | $9.2M | $220K | -$9.0M |
Monthly import values over time
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