What is HS code 2933.21?

HS code 2933.21 covers: Hydantoin and its derivatives. It belongs to chapter 29 (Organic chemicals) of the Harmonized System.

What is the US import duty for HS code 2933.21?

The US general (normal trade relations) rate is: 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 2933.21?

The UK extends 2933.21 to 7 declarable 10-digit commodity codes, starting with 2933210000. The full code goes on the UK customs declaration.

Chapter 29 · Organic chemicals · Section 6

HS Code 2933.21

Hydantoin and its derivatives

Heading 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only

US duty (general)

6.5%

US HTS lines

EU CN codes

UK commodity codes

Unit

US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources

United States - HTS lines under 2933.21

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
2933.21.00	Hydantoin and its derivatives	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 63%	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.

Customs value (USD) Quantity (kg)

European Union - CN codes under 2933.21

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 21 00	Hydantoin and its derivatives	EU duty (TARIC) →

United Kingdom - commodity codes under 2933.21

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 21 00 00	Hydantoin and its derivatives	UK duty & VAT →
2933 21 00 45	Sodium (5S,8S)-8-methoxy-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-ide (CAS RN 1400584-86-2) with a purity by weight of 90 % or more	UK duty & VAT →
2933 21 00 50	1-Bromo-3-chloro-5,5-dimethylhydantoin (CAS RN 16079-88-2) / (CAS RN 32718-18-6)	UK duty & VAT →
2933 21 00 55	1-Aminohydantoin hydrochloride (CAS RN 2827-56-7)	UK duty & VAT →
2933 21 00 60	DL-p-Hydroxyphenylhydantoin (CAS RN 2420-17-9)	UK duty & VAT →
2933 21 00 80	5,5-Dimethylhydantoin (CAS RN 77-71-4)	UK duty & VAT →
2933 21 00 90	Other	UK duty & VAT →

Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Other subheadings in 2933

2933.00 2933 Heterocyclic compounds with nitrogen hetero-atom(s) only 2933.11 Phenazone (Antipyrine) and its derivatives 2933.19 Other 2933.21 Hydantoin and its derivatives 2933.29 Other 2933.31 Pyridine and its salts 2933.32 Piperidine and its salts 2933.33 Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN 2933.34 Other fentanyls and their derivatives 2933.35 3-Quinuclidinol 2933.36 4-Anilino-N-phenethylpiperidine (ANPP) 2933.37 N-Phenethyl-4-piperidone (NPP) 2933.39 Other 2933.41 Levorphanol (INN) and its salts

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.