HTS 2933.99.75Heterocyclic compounds with nitrogen hetero-atom(s) only:Other: Other: Aromatic or modified aromatic: Other: Drugs: Other

What that translates to:Other (modified) aromatic N-heterocycle drugs

Also written 29339975 or 2933.99.7500. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Other (modified) aromatic N-heterocycle drugs (HTS 2933.99.75) from China, as of Oct 1, 2026: the patented-medicine tariff (Section 232) applies only to goods that match its legal description, quoted below, so the total depends on your product.

Total duty rateDepends on the product

Forced-labor tariffSection 301, since Jul 24, 202612.5%

Regular dutyBase rate (MFN) in the tariff schedule6.5%

Total dutyDepends on the product

The forced-labor tariff may not apply. The legal text: “articles that are for use in pharmaceutical applications” (HTS 9903.05.89).

Instead, the patented-medicine tariff adds 20% where this applies: “patented pharmaceutical articles imported for companies subject to an onshoring plan approved by the Secretary of Commerce in accordance with a process to be established in a Federal Register notice” (HTS 9903.04.64).

The patented-medicine tariff may not apply. The legal text: “patented pharmaceutical articles that meet the requirements of subdivision (h)(i) of this note and are imported for companies that have entered into a Most-Favored-Nation pharmaceutical pricing agreement with the Secretary of Health and Human Services” (HTS 9903.04.65).

The patented-medicine tariff may not apply. The legal text: “drugs and associated ingredients for all approved indications that are designated as orphan pursuant to the Orphan Drug Act, 21 U.S.C. 360aa et seq. and its implementing regulations; nuclear medicines; plasma-derived therapies; fertility treatments; cell and gene therapies; antibody drug conjugates; medical countermeasures related to chemical, biological, radiological and nuclear threats; or other specialty pharmaceutical products identified by the Secretary of Commerce or pharmaceutical products for animal health imported from a jurisdiction that has a current or forthcoming trade and security framework or that meet an urgent U.S. health need” (HTS 9903.04.66).

The patented-medicine tariff doesn't apply to “Pharmaceutical products with an active pharmaceutical ingredient packaged in dosage form that is a product of the United States” (HTS 9903.04.68).

The patented-medicine tariff may not apply. The legal text: “Pharmaceutical articles and associated ingredients provided for in subdivision (c) of U.S. note 40 to this subchapter that are solely for use in clinical trials, research and development, or other non-commercial applications” (HTS 9903.04.70).

No forced-labor tariff if the patented-medicine tariff (HTS 9903.04.60) applies to your goods.

The patented-medicine tariff is 100% in place of the regular duty where this applies: “patented pharmaceutical articles provided for in subdivision (c) of this note” (HTS 9903.04.60).

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31.

Estimate your duty

Special rules apply to this code or country, so we don't estimate it here. A licensed customs broker can work it out for your shipment.

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Official description

Heterocyclic compounds with nitrogen hetero-atom(s) only: Other: Other: Aromatic or modified aromatic: Other: Drugs: Other

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 29: Organic chemicals.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

2933.99.7500 (2933997500)Other · reported in kg

What changed for this code

Sep 29, 2026Section 232 tariff on patented medicines starts for all other companies
Jul 31, 2026Section 232 tariff on patented medicines starts for listed companies
Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 2933.99.75

What is the duty rate for HTS 2933.99.75?

The regular (column 1 general) rate printed in the tariff schedule is 6.5%. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 2933.99.75 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 2933.99.75 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 2933.99.75 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.