The tariff classification of Roflumilast (CAS No. 162401-32-3), imported in bulk form, from Mexico

N358410
February 27, 2026
CLA-2-29:OT:RR:NC:N3:138
CATEGORY: Classification
TARIFF NO.: 2933.39.4100
Karen Stutman Ren-Pharm International, Ltd. 350 Jericho Turnpike, Suite 204 Jericho, NY 11753 RE: The tariff classification of Roflumilast (CAS No. 162401-32-3), imported in bulk form, from Mexico Dear Ms. Stutman: In your letter dated January 31, 2026, you requested a tariff classification ruling. Roflumilast, imported in bulk powder form, is a selective phosphodiesterase 4 (PDE4) inhibitor. It is indicated for the treatment of chronic obstructive pulmonary disease (COPD). The applicable subheading for the Roflumilast imported in bulk form will be 2933.39.4100, Harmonized Tariff Schedule of the United States (HTSUS), which provides for “Heterocyclic compounds with nitrogen hetero-atom(s) only: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Other: Other: Drugs: Other.” Pursuant to GN13, HTSUS, the rate of duty will be free. The duties cited above are current as of this ruling’s issuance. Duty rates are provided for your convenience and are subject to change. The text of the most recent HTSUS and the accompanying duty rates are provided at https://hts.usitc.gov/. This merchandise may be subject to the Federal Food, Drug, and Cosmetic Act and/or The Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (The Bioterrorism Act), which are administered by the U.S. Food and Drug Administration (FDA). Information on the Federal Food, Drug, and Cosmetic Act, as well as The Bioterrorism Act, can be obtained by calling the FDA at 1-888-463-6332, or by visiting their website at www.fda.gov. This ruling does not address the applicability of any additional duties, taxes, fees, exactions and/or other charges, which may apply to the goods discussed herein. This includes, but is not limited to, tariffs and other duties as provided for in Subchapter III to Chapter 99, HTSUS. Thus, for example, in addition to the

classification stated above, the merchandise covered by this ruling may also need to be reported with either the Chapter 99 provision under which an additional tariff applies or one of the Chapter 99 provisions covering exceptions to such tariffs. For further information to assist with the importation process, please refer to the frequently updated Cargo Systems Messaging Service (CSMS) messages at https://www.cbp.gov/trade/automated/cargo-systems-messaging-service and the Trade Remedies page at https://www.cbp.gov/trade/programs-administration/trade-remedies. The holding set forth above applies only to the specific factual situation and merchandise description as identified in the ruling request. This position is clearly set forth in Title 19, Code of Federal Regulations (CFR), Section 177.9(b)(1). This section states that a ruling letter is issued on the assumption that all of the information furnished in the ruling letter, whether directly, by reference, or by implication, is accurate and complete in every material respect. In the event that the facts are modified in any way, or if the goods do not conform to these facts at time of importation, you should bring this to the attention of U.S. Customs and Border Protection (CBP) and submit a request for a new ruling in accordance with 19 CFR 177.2. Additionally, we note that the material facts described in the foregoing ruling may be subject to periodic verification by CBP. This ruling is being issued under the provisions of Part 177 of the Customs and Border Protection 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, please contact National Import Specialist Judy Lee at [email protected].
Sincerely,
(for) James Forkan Designated Official Performing the Duties of the Division Director National Commodity Specialist Division