Tandom · Duty calculator
Add country and invoice value for the full duty stack — base + 301 + 232 + AD/CVD + fees.
HTS 2933.99.65.00 is the U.S. Harmonized Tariff Schedule classification for Heterocyclic compounds with nitrogen hetero-atom(s) only, anticonvulsants, hypnotics and sedatives. It's a 10-digit statistical line in Chapter 29: Organic chemicals, Section VI: Products of the Chemical or Allied Industries, used by U.S. Customs and Border Protection to determine the duty rate at entry. No Chapter 99 tariff modifications (Section 301, Section 232, IEEPA) or AD/CVD orders currently flag this code in Tandom's catalog.
New to HTS codes? Read our guide on how HTS classification works →
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification of Eslicarbazepine Acetate (CAS No. 236395-14-5) in bulk form, from Taiwan
The tariff classification of Fampridine (CAS-504-24-5), in bulk form, from India, Milnacipran Hydrochloride (CAS-101152-94-7) and Rufinamide (CAS-106308-44-5) in bulk form, from Italy
The tariff classification of Eslicarbazepine Acetate (CAS-236395-14-5) in bulk form, from Italy
The tariff classification of Carbamazapine (CAS-298-46-4), Prilocaine (CAS-721-50-6), Pramoxine Hydrochloride (CAS-637-58-1), and Fulvestrant (CAS-129453-61-8) from Brazil and Italy
The tariff classification of Tramadol (CAS-27203-92-5), Zidovudine (CAS-30516-87-1) and Zolpidem Tartrate (CAS-99294-93-6), imported in bulk form, from Italy, Spain and Malta, respectively
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 2933.99.65.00 is the U.S. Harmonized Tariff Schedule classification for Heterocyclic compounds with nitrogen hetero-atom(s) only, anticonvulsants, hypnotics and sedatives. It belongs to Chapter 29 of the HTSUS.
The general (Column 1) duty rate for HTS 2933.99.65.00 is 6.5%. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
Yes. Imports of HTS 2933.99.65.00 from countries party to a trade program (such as USMCA, KORUS, GSP, or the African Growth and Opportunity Act) may qualify for the special rate: Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG). Eligibility depends on rules of origin and certification.
The Column 2 rate for HTS 2933.99.65.00 is 15.4¢/kg + 48.5%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
No active Chapter 99 tariff overlays (Section 301, Section 232, IEEPA reciprocal, etc.) currently flag HTS 2933.99.65.00 in Tandom's catalog. Use the calculator's date + origin inputs to confirm against any retroactive overlay you may be filing.
No active AD/CVD orders currently flag HTS 2933.99.65.00 in Tandom's catalog. Tandom monitors Federal Register notices daily; a flag will appear here within 24h of any new order's publication.
Free Trade Agreement and special-program eligibility
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