Chapter 29 · Organic chemicals · Section 6
HS Code 2933.79
Other lactams
Heading 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only
US HTS + UK Tariff v4.0.1633 · updated 2026-10-21 · sources
Rates on this page are the official published schedule rates, shown for information. This is not a customs ruling: preference programs, Section 232/301 surcharges and per-shipment fees can change what you actually pay.
United States - HTS lines under 2933.79
Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.
| HTS code | Description | General | Special | Other | Unit |
|---|---|---|---|---|---|
| 2933.79.04 |
Other lactams > Aromatic or modified aromatic > 2,5-Dihydro-3,6-diphenylpyrrolo-(3,4-c)- pyrrole-1,4-dione |
Free | - | 15.4¢/kg + 52% | kg |
| 2933.79.08 |
Aromatic or modified aromatic > Other > Products described in additional U.S. note 3 to section VI |
6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | kg |
| 2933.79.15 |
Aromatic or modified aromatic > Other > Other |
6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | kg |
| 2933.79.20 |
Other lactams > Other > N-Methyl-2-pyrrolidone; and 2-Pyrrolidone |
4.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2933.79.30 |
Other lactams > Other > N-Vinyl-2-pyrrolidone, monomer |
5.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 40% | kg |
| 2933.79.40 |
Other lactams > Other > 12-Aminododecanoic acid lactam |
Free | - | 30.5% | kg |
| 2933.79.85 |
Other lactams > Other > Other |
6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) | 30.5% | kg |
Estimate the US duty runs in your browser · no caps
Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.
European Union - CN codes under 2933.79
Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.
| CN code | Description | |
|---|---|---|
| 2933 79 00 | Other lactams | EU duty (TARIC) → |
United Kingdom - commodity codes under 2933.79
Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.
| Commodity code | Description | |
|---|---|---|
| 2933 79 00 00 | Other lactams | UK duty & VAT → |
| 2933 79 00 15 | Ethyl N-(tert-Butoxycarbonyl)-L-pyroglutamate (CAS RN 144978-12-1) | UK duty & VAT → |
| 2933 79 00 23 | (S)-2-Amino-3-[(S)-2-oxopyrrolidin-3-yl]propanamide hydrochloride (CAS RN 2628280-48-6) with a purity by weight of 95 % or more | UK duty & VAT → |
| 2933 79 00 25 | Methyl 2-oxo-2,3-dihydro-1H-indole-6-carboxylate (CAS RN 14192-26-8) | UK duty & VAT → |
| 2933 79 00 30 | 5-Vinyl-2-pyrrolidone (CAS RN 7529-16-0) | UK duty & VAT → |
| 2933 79 00 45 | 1-phenyl-3H-indol-2-one (CAS RN 3335-98-6) with a purity by weight of 99 % or more | UK duty & VAT → |
| 2933 79 00 55 | (3S,4R)-3-Amino-4-hydroxypyrrolidin-2-one hydrochloride (CAS RN 2446872-13-3) with a purity by weight of 98 % or more | UK duty & VAT → |
| 2933 79 00 65 | 1-Dodecyl-2-pyrrolidone (CAS RN 2687-96-9) with a purity by weight of 98 % or more | UK duty & VAT → |
| 2933 79 00 75 | N-(n-octyl)-2-pyrrolidone (CAS RN 2687-94-7) with a purity by weight of 99 % or more | UK duty & VAT → |
| 2933 79 00 85 | 3,5-Dibromo-1-methyl-2(1H)-pyridinone (CAS RN 14529-54-5) with a purity by weight of 97 % or more | UK duty & VAT → |
| 2933 79 00 90 | Other | UK duty & VAT → |
Nearby codes in heading 2933
The subheadings immediately before and after 2933.79 in chapter 29.
Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.
Frequently asked questions
Common questions about HS code 2933.79.
What is HS code 2933.79?
HS code 2933.79 covers: Other lactams. It belongs to chapter 29 (Organic chemicals) of the Harmonized System.
What is the US import duty for HS code 2933.79?
The US general (normal trade relations) rates under this subheading range: Free - 6.5%. Preference programs and Section 232/301 surcharges can change the effective rate; see the HTS lines for detail.
What is the UK commodity code for 2933.79?
The UK extends 2933.79 to 11 declarable 10-digit commodity codes, starting with 2933790000. The full code goes on the UK customs declaration.