Hormones — HTS 2937
Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones
Chapter 29 › Heading 2937
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 2937 is a broad product category for hormones and related biologically active substances. It covers substances found in nature or made by synthesis, along with derivatives and structural analogues. The heading also includes certain chain-modified polypeptides and related products when they are used primarily as hormones.
A merchant must narrow the heading to a more specific tariff line, usually by identifying the substance’s chemical or biological type and the description of the relevant subheading. The final 8-digit code may depend on details such as whether the product is a particular hormone, a derivative or analogue, a polypeptide, or another listed grouping. Use the current HTSUS text and accompanying notes; do not choose a code based only on a product’s brand name or medical purpose.
What to check
- Identify the exact active ingredient, including its chemical name, biological name, and any derivative, analogue, or chain modification.
- Check the product’s composition, formulation, and physical presentation; confirm whether the tariff provision covers the substance itself or a preparation containing it.
- Read the heading, subheadings, section and chapter notes, and any applicable definitions before selecting the 8-digit code.
- Compare the product’s technical documents—such as specifications, certificates of analysis, and manufacturing information—with the wording of candidate provisions.
- If the substance is unusual, modified, mixed, or difficult to classify, obtain a customs-broker review or seek a formal classification ruling.
HTS heading 2937 summary
Hormones is a 4-digit product category containing 6 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 2937.23 | Estrogens and progestins |
| 2937.29 | Other |
| 2937.90 | Other |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 2937.11.00.00 👉 | Somatotropin, its derivatives and structural analogues | Free | — | 10% |
| 2937.12.00.00 👉 | Insulin and its salts | Free | — | 10% |
| 2937.19.00.00 👉 | Other | Free | — | 25% |
| 2937.21.00 👉 | Cortisone, hydrocortisone, prednisone (dehydrocortisone), and prednisolone (dehydrohydrocortisone) | Free | — | 25% |
| 2937.22.00 👉 | Halogenated derivatives of adrenal cortical hormones | Free | — | 25% |
| 2937.50.00.00 👉 | Prostaglandins, thromboxanes and leukotrienes, their derivatives and structural analogues | Free | — | 25% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2937?
Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.