HS 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
HEADING DEFINITION & DISAMBIGUATION
HS Heading 2937 encompasses hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones. It classifies 9 6-digit WCO subheadings within Chapter 29 under the Harmonized System [USITC HTS 2026].
Subheadings Under Heading 2937
| HS Code | WCO 6-Digit Subheading Description | Chapter | Operational Package |
|---|---|---|---|
| 2937.11 | Polypeptide hormones, protein hormones and glycoprotein hormones, their derivatives and structural analogues, Somatotropin, its derivatives and structural analogues | 29 | View 2937.11 Package → |
| 2937.12 | Polypeptide hormones, protein hormones and glycoprotein hormones, their derivatives and structural analogues, Insulin and its salts | 29 | View 2937.12 Package → |
| 2937.19 | Polypeptide hormones, protein hormones and glycoprotein hormones, their derivatives and structural analogues, Other | 29 | View 2937.19 Package → |
| 2937.21 | Steroidal hormones, their derivatives and structural analogues, Cortisone, hydrocortisone, prednisone (dehydrocortisone), and prednisolone (dehydrohydrocortisone) | 29 | View 2937.21 Package → |
| 2937.22 | Steroidal hormones, their derivatives and structural analogues, Halogenated derivatives of adrenal cortical hormones | 29 | View 2937.22 Package → |
| 2937.23 | Steroidal hormones, their derivatives and structural analogues, Estrogens and progestins | 29 | View 2937.23 Package → |
| 2937.29 | Steroidal hormones, their derivatives and structural analogues, Other | 29 | View 2937.29 Package → |
| 2937.50 | Prostaglandins, thromboxanes and leukotrienes, their derivatives and structural analogues | 29 | View 2937.50 Package → |
| 2937.90 | Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones, Other | 29 | View 2937.90 Package → |
DISAMBIGUATION & CLASSIFICATION GUIDE
How to Select the Correct Subheading Under Heading 2937
Commercial shipments must be declared under the exact 6-digit WCO subheading that matches physical, chemical, or processing characteristics. Review the subheading descriptions above and verify against binding CBP CROSS rulings prior to entry filing.
Official Primary Sources & Authority References
USITC HTS Heading 2937 ↗
United States International Trade Commission official Harmonized Tariff Schedule.
CBP CROSS Rulings ↗
CBP e-Rulings database for Heading 2937 precedent rulings.
WCO Nomenclature ↗
World Customs Organization Harmonized System 2022 nomenclature standard.
U.S. Census Foreign Trade ↗
U.S. Census Bureau HTS-to-NAICS concordance and Schedule B export database.
Heading 2937 Frequently Asked Questions (FAQ)
What commercial articles are grouped under HS Heading 2937?
HS Heading 2937 covers Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones, grouping 9 6-digit WCO subheadings.
How are 6-digit subheadings structured under Heading 2937?
Subheadings under Heading 2937 range from 2937.11 to 2937.90, classifying goods by processing state, origin, or material composition.
What is the representative US import duty rate for Heading 2937?
US MFN general duty rates for Heading 2937 commodities range from Duty-Free up to representative ad valorem percentages under the 2026 US HTS.
Are Section 301 tariffs applicable to goods under Heading 2937?
Section 301 additional tariffs depend on the specific 8-digit or 10-digit US HTS code and country of origin (e.g. China Lists 1–4A).
What PGA message set flags apply to Heading 2937?
Partner Government Agency flags (FDA, USDA APHIS, EPA) apply depending on the specific commodity sub-classification.
How do I distinguish between subheadings under Heading 2937?
Review WCO subheading terms and candidate descriptions. For example, unroasted vs. roasted or decaffeinated vs. non-decaffeinated.
Can goods under Heading 2937 enter duty-free under USMCA?
Yes. Goods originating in USMCA territories (US, Mexico, Canada) enter duty-free under SPI code P with a valid Certificate of Origin.
What is the Section 321 de minimis limit for Heading 2937?
Eligible import shipments valued at $800 USD or less imported by one person on one day enter duty-free under 19 U.S.C. 1321.
What documents are required for formal customs entry of Heading 2937?
Commercial Invoice, Packing List, Bill of Lading, and CBP Form 7501 are mandatory for entries exceeding $2,500 USD.
How can an importer get a binding CBP classification ruling for Heading 2937?
Importers may apply for a binding ruling via CBP National Commodity Specialist Division under 19 CFR Part 177.