U.S. Customs and Border Protection · CROSS Database · 1 HTS code referenced
Primary HTS Code
2937.29.9090
$6.5M monthly imports
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Ruling Age
21 years
Data compiled from CBP CROSS Rulings, Census Bureau Trade Data · As of 2026-05-04 · Updates monthly
The tariff classification of Spironolactone (CAS-52-01-7), imported in bulk form, from Italy
NY L82501 February 16, 2005 CLA-2-29:RR:NC:2:238 L82501 CATEGORY: Classification TARIFF NO.: 2937.29.9090 Ms. Inge Forstenzer Ren-Pharm International, Ltd. 350 Jericho Turnpike, Suite 204 Jericho, NY 11753 RE: The tariff classification of Spironolactone (CAS-52-01-7), imported in bulk form, from Italy Dear Ms. Forstenzer: In your letter dated February 3, 2005, you requested a tariff classification ruling. The subject product, Spironolactone, is an analogue of a steroid hormone. It functions as an aldosterone-receptor antagonist, and is indicated for use as a diuretic. Pursuant to Explanatory Note 29.37(V)(b), HTS, the applicable subheading for Spironolactone, imported in bulk form, will be 2937.29.9090, Harmonized Tariff of the United States (HTS), which provides for “Hormones, … , natural or reproduced by synthesis; derivatives and structural analogues thereof, … , used primarily as hormones: Steroidal Hormones, their derivatives and structural analogues: Other: Other: Other.” The rate of duty will be free. This merchandise may be subject to the requirements of the Federal Food, Drug, and Cosmetic Act, which is administered by the U.S. Food and Drug Administration. You may contact them at 5600 Fishers Lane, Rockville, Maryland 20857, telephone number 1-888-443-6332. This ruling is being issued under the provisions of Part 177 of the Customs Regulations (19 C.F.R. 177). A copy of the ruling or the control number indicated above should be provided with the entry documents filed at the time this merchandise is imported. If you have any questions regarding the ruling, contact National Import Specialist Harvey Kuperstein at 646-733-3033. Sincerely, Robert B. Swierupski Director, National Commodity Specialist Division