Product classification

HS code for Estrogen: 2937.23

Steroidal hormones, their derivatives and structural analogues, oestrogens and progestogens.

Classification of estrogen under HS 2937.23

Estrogen is classified under HS code 293723 because it is a steroidal hormone, specifically categorized within the sub-group of oestrogens and progestogens. Chapter 29 of the Harmonized System covers organic chemicals, and heading 2937 is dedicated to hormones, prostaglandins, thromboxanes, and leukotrienes, whether natural or reproduced by synthesis. Since estrogen is a primary female sex hormone and its derivatives are used extensively in pharmaceutical manufacturing, it falls under this specific subheading. The classification is determined by the chemical structure of the molecule, which consists of a steroid nucleus. This code applies to the pure chemical substance or its derivatives, provided they are not yet formulated into a specific dosage form for therapeutic use. According to the General Rules of Interpretation (GRI 1), classification is determined by the terms of the headings and any relative section or chapter notes. Chapter 29 Note 8 specifies that hormones include hormone-releasing or hormone-stimulating factors. Estrogen, being a fundamental hormone, fits perfectly within this scope. The distinction between 293723 and other subheadings in 2937 depends on the specific chemical structure—oestrogens are characterized by their aromatic A-ring. This classification is vital for international trade as it allows customs authorities to monitor the movement of hormonal substances, which are often subject to strict regulatory oversight due to their biological activity.

Covers
  • Estradiol and its esters
  • Estrone and its derivatives
  • Estriol
  • Synthetic oestrogens used in bulk pharmaceutical manufacturing
  • Ethinylestradiol
Also under 2937.23
  • Premarin (Pfizer)
  • Provera (Pfizer)
  • Yasmin (Bayer)
  • Loestrin (Allergan)
  • NuvaRing (Merck)

Codes often confused with 2937.23

Common mistake. Estrogen is frequently misclassified under HS code 3004 when it is imported in bulk. However, 3004 is reserved for medicaments consisting of mixed or unmixed products for therapeutic or prophylactic uses, put up in measured doses or in forms or packings for retail sale. Another common error is using 293729, which is a residual category for other steroidal hormones, whereas estrogen has its own specific sub-category in 293723.

30.04Medicaments; (not goods of heading no. 3002, 3005 or 3006) consisting of mixed or unmixed products for therapeutic or prophylactic use, put up in measured doses (incl. those in the form of transdermal admin. systems) or packed for retail sale2937.29Steroidal hormones, their derivatives and structural analogues; other than cortisone, hydrocortisone, prednisone (dehydrocortisone), prednisolone (dehydrohydrocortisone), halogenated derivatives of corticosteroidal hormones, oestrogen and progestogens

Top exporters and importers of HS 293723 (the code used for estrogen), 2025

In 2025, the largest exporter of HS 293723 (the code used for estrogen) in UN Comtrade data was China, with 45% of world exports; the largest importer in UN Comtrade data was the United States, with 11% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Figures cover everything classified under HS 293723, not only estrogen.

Top exporters 2025 · share of world exports

  1. 1 China $344M
  2. 2 Italy $145M
  3. 3 Netherlands $68M

World total: $772M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $75M
  2. 2 India $57M
  3. 3 France $52M

World total: $697M Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM codes for estrogen

Brazil splits HS 2937.23 into 16 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about estrogen

What is the HS code for Estrogen?

The HS code for Estrogen is 293723 (Steroidal hormones, their derivatives and structural analogues; oestrogens and progestogens). The HS code for estrogen in its pure or bulk chemical form is 293723.

How do I classify Estrogen for customs?

Estrogen is classified under HS code 293723 — Steroidal hormones, their derivatives and structural analogues; oestrogens and progestogens. This is a 6-digit subheading level code.

Is synthetic estrogen classified differently?

No, HS code 293723 covers both natural estrogens and their synthetic structural analogues, provided they are used for their hormonal effect.

Which countries are the top exporters of estrogen (HS 293723)?

In 2025, the top exporters of HS 293723 (the code used for estrogen) in UN Comtrade data were China ($344M, 45% of world exports), Italy ($145M) and the Netherlands ($68M). World exports came to about $772M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of estrogen (HS 293723)?

In 2025, the top importers of HS 293723 (the code used for estrogen) in UN Comtrade data were the United States ($75M, 11% of world imports), India ($57M) and France ($52M). World imports came to about $697M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Is the HS code for Estrogen the same in all countries?

The base HS code 293723 for Estrogen is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for estrogen in Brazil?

Brazil splits HS 293723 into 16 NCM codes, so the right one for estrogen depends on the product's details: 2937.23.10 (Medroxyprogesterone and its derivatives), 2937.23.21 (L-Norgestrel (levonorgestrel)), 2937.23.22 (DL-Norgestrel), 2937.23.29 (Other norgestrel derivatives), 2937.23.31 (Estriol and its succinate), 2937.23.39 (Other estriol esters and salts), and more.