Chemical importers: cut duty exposure and recover paid tariffs

Degussa Corp. v. United States, 508 F.3d 1044 (Fed. Cir. 2007)

Surface-modified (hydrophobic) silica was held classifiable as silicon dioxide in Chapter 28 as a separate chemically defined compound, even though the surface treatment changed the particle from water-attractive to water-repellent, because the bulk and essence of the product remained silicon dioxide. The case turned on the meaning of permissible 'impurities' under Chapter 28 Note 1 and shows how far a chemically defined compound can be modified before it leaves its eo nomine chapter.

Chapter 28 Note 1(a) - impurities principle (as applied by the courts)

A separate chemical element or separate chemically defined compound is not excluded from Chapter 28 solely because it contains impurities, where those impurities result from the manufacturing process. Substances added to modify the product's characteristics, by contrast, are not permissible impurities and can push a product out of the chapter. This is the general test courts apply when deciding compound-versus-mixture disputes.

What duty will I pay to import chemicals from China?

Expect a stack, not a single rate. You pay the MFN duty for the exact subheading (many chemicals run 3.7-6.5%, some enter free), plus a Section 301 additional duty of 25% on Lists 1-3 or 7.5% on List 4A, plus the Section 122 surcharge of 10% if it is in force at entry. If your product and producer fall under an antidumping or countervailing order, that rate stacks on top and can be the largest number by far. The exact total depends on your 8-digit HTS, origin, and producer.

Can I get duty drawback on imported chemicals?

Yes, and chemicals are one of the best-suited categories for it. Because commodity chemicals are commercially interchangeable, substitution drawback lets you claim up to 99% of duty paid on imported product when you export or destroy other merchandise under the same 8-digit HTS - you do not have to trace the exact molecules. Section 301 duties are drawback-eligible; Section 232 duties are not. We estimate the recovery and a licensed drawback partner files the claim.

How do I know whether my product is in Chapter 29 or Chapter 38?

The dividing line is whether your product is a separate chemically defined compound or a mixture. Chapter 29 covers single organic compounds (impurities from manufacturing are allowed); once a product is a deliberate mixture or preparation, it usually moves to Chapter 38, most often heading 3824, where duty rates and AD/CVD scope can differ. Added stabilizers, solvents beyond what is needed for safe transport, or surface treatments can move a product across the chapter line, so the classification has to be worked from the actual composition, not the marketing name.

How high can antidumping duties on chemicals go?

Higher than most importers expect - well into the hundreds of percent. Antidumping and countervailing rates are set per producer and per country, and for some chemicals they exceed 500%. Melamine from India, for example, carries antidumping margins from roughly 506% to 632% under orders effective April 9, 2025. Because AD/CVD stacks on top of MFN and Section 301, a single order can turn a marginally profitable import into a loss. Always check the current scope and producer-specific rate in Commerce's ACCESS system before you order.

Is my chemical covered by an antidumping order?

It depends on the precise scope language of the order, not just the HTS code. Antidumping and countervailing orders are written around specific chemical descriptions and origins, and CBP applies them by matching your product to that scope - the HTS numbers listed in an order are for reference only. Active chemical orders include glycine (India, China, Japan, Thailand; continued November 29, 2024) and melamine (India; 2025), while citric acid from Canada and India is under active investigation as of 2026 with no order yet. We check scope against your actual product and, where it is close, help you document the position.

Does Section 232 apply to chemicals?

Most chemicals are outside Section 232, but products with covered steel, aluminum, or copper content or that fall within a derivative list can be pulled in. When 232 applies, since April 6, 2026 the duty is charged on the full customs value of the article (not just the metal portion), with tiers of 50/25/a temporary 15%/10% for articles at least 85% US metal/and 0% for articles under 15% metal. Section 232 duties cannot be recovered through drawback, which is why the metals-content question matters for both cost and recovery planning.

How does classification by CAS number work for customs?

A CAS number identifies the substance but does not by itself give you an HTS code. The same CAS chemical can be classified in different subheadings - and carry different duty rates - depending on its form, purity, concentration, and how it is put up for sale. Classification follows the HTS chapter notes and General Rules of Interpretation, so two shipments of the same CAS substance can classify differently if one is a pure compound and the other is a mixture or a retail preparation. We map CAS to HTS from the actual product specification, then verify it in the Product Sandbox.

Are any chemicals duty-free regardless of origin?

Yes. Compounds listed in the Pharmaceutical Appendix to the HTS enter duty-free under General Note 13, and intermediate chemicals for dyes listed under General Note 14 enter duty-free under the Intermediate Chemicals for Dyes Appendix. Appendix status is easy to overlook because it lives outside the normal chapter tables, so it is worth checking before you accept a dutiable MFN rate. Note that appendix duty-free status addresses the base MFN duty; it does not by itself remove Section 301, Section 122, or AD/CVD if those apply.

Can a foreign-trade zone lower my chemical tariffs?

An FTZ mainly helps with cash flow and with the base MFN layer, not with trade-remedy duties. Chemicals sitting in a zone owe no duty until they enter U.S. commerce, and re-exported product owes nothing at all; you can also cap the Merchandise Processing Fee through weekly entry, which is meaningful for high-volume tank and bulk importers. Where an inverted tariff exists - the finished chemical is dutiable at a lower rate than its inputs - you can elect the finished-good rate. But Section 301, 232, and 122 merchandise must be admitted in privileged foreign status, so the zone gives you deferral on those layers, not a lower rate.

Can I recover duties I already paid on chemical imports?

Often, yes, through more than one route. If you export or destroy interchangeable product, substitution or manufacturing drawback can refund up to 99% of eligible duty. If a classification or valuation was wrong on a liquidated entry, you can file a protest within 180 days of liquidation, or a Post Summary Correction before liquidation (generally usable up to about 300 days from entry). IEEPA tariffs collected from early 2025 through February 24, 2026 are refundable following the Supreme Court's decision in Learning Resources v. Trump - we prepare and file that refund package ourselves. We estimate what is recoverable; we never guarantee an amount or that CBP will accept a claim.

What happened to the IEEPA tariffs I paid on chemicals?

They are refundable. The Supreme Court struck the IEEPA tariffs in Learning Resources v. Trump on February 20, 2026, and collection ended February 24, 2026; duties paid under IEEPA from early 2025 through that date are recoverable. This is separate from Section 232 and Section 301, which were not affected by the ruling and remain in force. We file the IEEPA refund package for importers; the drawback and protest routes above address the tariffs that are still being collected.

Do you file my drawback claims and act as my broker?

We are a builder, not a broker. We do the analysis - classification, tariff stacking, drawback estimation, and valuation strategy - and we file IEEPA refund packages directly. Drawback claims themselves are filed through a licensed drawback partner, and our Trade Advisory is commercial trade guidance, not legal counsel. Where a position needs a customs attorney or a licensed broker of record, we tell you and coordinate rather than overstate what we do.