HS 293329 Other
Quick Answer: HS code 293329, titled "Other," encompasses a diverse range of heterocyclic compounds with nitrogen hetero-atom(s) only, specifically those containing an un-fused pyridine ring (whether or not hydrogenated) in the structure, not further specified elsewhere within heading 2933. This includes various organic chemicals used in pharmaceuticals, agrochemicals, and specialty chemical manufacturing. Duty rates vary significantly: the UK Trade Tariff shows 0.00% for many subheadings, while the EU TARIC generally applies a 6.50% ad valorem duty. The US Harmonized Tariff Schedule (HTS) presents a wider range, from "Free" to complex compound rates like 15.4¢/kg + 52% ad valorem, or 5.8% ad valorem. Importers and customs brokers must meticulously classify specific products under the correct national subheading to determine the precise duty liability and ensure compliance, given the broad nature of this "Other" category.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2933291000 | 0.00 % | — | — |
| 2933299015 | 0.00 % | — | — |
| 2933299038 | 0.00 % | — | — |
| 2933290000 | — | — | — |
| 2933299000 | — | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2933299038 | 6.50 % | — | — |
| 2933299043 | 6.50 % | — | — |
| 2933299060 | 6.50 % | — | — |
| 2933299075 | 6.50 % | — | — |
| 2933299080 | 6.50 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2933290500 | Free | — | ["kg"] |
| 2933291000 | 5.8% | Free (17 programs) | ["kg"] |
| 293329 | — | — | — |
| 2933292000 | 6% | Free (18 programs) | ["kg"] |
| 2933293500 | 6.5% | Free (18 programs) | ["kg"] |
Special rates available under trade agreements including USMCA, KORUS, GSP.
Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).
Data compiled and presented by HSRates.
Which Trade Agreements Reduce Duties for HS 2933.29?
Imports of Other may qualify for reduced or zero duty rates under free trade agreements and preferential programs. The overview below shows available preferential arrangements by jurisdiction, compiled by HSRates from official tariff and trade agreement data.
United States (HTSUS)
Free for USMCA, KORUS, GSP, and 16 other programs
European Union (TARIC)
Preferential rate data not yet available.
United Kingdom
Preferential rate data not yet available.
Preferential rates require proof of origin and may be subject to quotas or conditions. Always verify eligibility with a licensed customs broker.
Data compiled by HSRates.
Which Preferential Rates Apply to Your Origin Country?
Select an origin country to see if preferential rates apply.
Preferential rates based on available trade agreements. Actual rates may vary.
How Has Trade Volume Developed?
Trade Volume 2023
How to Classify This HS Code?
What products does HS 293329 cover?
This subheading covers "Other" compounds containing an unfused imidazole ring, whether or not hydrogenated, within Heading 2933. Specifically, it encompasses heterocyclic compounds whose molecular structure incorporates an imidazole ring that is not fused with other ring systems. This includes various organic chemicals that possess this specific nitrogen-containing heterocyclic structure, provided they are not more specifically enumerated in other subheadings under 2933. The WCO Harmonized System Explanatory Notes and official definitions from the USITC and EU TARIC confirm this scope, focusing on the presence of the unfused imidazole ring as the primary classifying characteristic for these chemical compounds.
What falls outside HS 293329?
The following products are excluded from HS 293329: compounds containing a pyrimidine ring (e.g., barbituric acid and its derivatives, HS 293353), compounds containing a piperazine ring (HS 293354), and nucleic acids and their salts (HS 293499). Additionally, compounds where the imidazole ring is fused with other ring systems, such as purines and their derivatives (e.g., caffeine, theophylline, HS 293951 or 293959), are specifically excluded from this subheading because they fall under different structural classifications within Heading 2933 or other headings. Polymers and medicaments containing these compounds are also excluded, as they are classified under Chapters 30 or 39, respectively, based on their form and intended use.
What are common classification mistakes for HS 293329?
A common error is misclassifying imidazole derivatives that are specifically provided for elsewhere in Heading 2933 or other headings. Importers sometimes overlook the "unfused" criterion, incorrectly placing compounds with fused imidazole rings into 293329. Another frequent mistake involves failing to apply General Interpretative Rule (GRI) 3(a) correctly when a product could potentially fall under two equally specific headings, leading to incorrect classification. Furthermore, products that are medicaments (Chapter 30) or polymers (Chapter 39) but contain an imidazole compound are sometimes erroneously classified here instead of their correct end-use chapter, ignoring the primary function or form of the imported good.
How should importers classify products under HS 293329?
The correct procedure for classifying products under HS 293329 involves a meticulous review of the chemical structure to confirm the presence of an unfused imidazole ring. Importers and customs brokers should first consult the WCO Harmonized System Explanatory Notes for Heading 2933 to understand the precise scope. Next, verify that the compound is not specifically enumerated in any other subheading of 2933 or other chapters, applying GRI 1 and 6. Obtain a detailed Certificate of Analysis or chemical structure diagram from the manufacturer. If uncertainty persists, consider requesting a binding ruling from the relevant customs authority (e.g., CBP in the US, national customs authorities in the EU) to ensure accurate and legally compliant classification, thereby avoiding potential penalties or delays.
Which HS Codes Are Related?
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FAQ
What is the Most Favored Nation (MFN) duty rate for products classified under HS 2933.29 in the United States, European Union, and United Kingdom?
For the United States, the MFN (General) duty rate for HS 2933.29.00.00 'Other' is 6.5% ad valorem, as per the Harmonized Tariff Schedule of the United States (HTSUS). In the European Union, the MFN duty rate (Third Country Duty) for HS 2933.29.00 is 6.5% ad valorem, according to the TARIC database. For the United Kingdom, the MFN duty rate for HS 2933.29.00.00 is also 6.5% ad valorem, as published in the UK Global Tariff. It's crucial for importers to verify the specific 10-digit subheading for precise rates.
What are the key classification criteria for determining if a product falls under HS 2933.29 'Other'?
HS 2933.29 is a residual 'Other' subheading within heading 2933, which covers 'Heterocyclic compounds with nitrogen hetero-atom(s) only'. Classification under 2933.29 typically applies to nitrogen heterocyclic compounds that are not specifically provided for in subheadings 2933.11 through 2933.21 (e.g., compounds with an unfused pyrazole ring, hydantoin and its derivatives). Importers must ensure the compound contains only nitrogen as the hetero-atom in the heterocyclic ring system and does not fit a more specific subheading within 2933. If the compound contains other hetero-atoms (e.g., oxygen, sulfur) in addition to nitrogen, it would be classified elsewhere (e.g., heading 2934). Reference to the WCO Explanatory Notes for Chapter 29 is essential for accurate interpretation.
Are there any preferential duty rates or free trade agreements that commonly impact imports under HS 2933.29?
Yes, preferential duty rates can significantly impact imports under HS 2933.29. For instance, goods originating from countries party to agreements like the USMCA (United States-Mexico-Canada Agreement) or the EU's various Free Trade Agreements (FTAs) may qualify for a 0.00% ad valorem duty rate, provided they meet the specific Rules of Origin. For the UK, similar preferential rates apply under its continuity agreements or new FTAs. For example, under the USMCA, qualifying goods from Mexico or Canada would enter the U.S. duty-free. Importers should consult the specific trade agreement's rules of origin and provide a valid certificate of origin or declaration to claim preferential treatment. Failure to meet origin requirements will result in the application of the MFN duty rate.
What documentation is typically required for customs clearance of chemical products classified under HS 2933.29?
Standard documentation for customs clearance of chemical products under HS 2933.29 includes a commercial invoice, packing list, and bill of lading or air waybill. Additionally, due to the nature of chemical compounds, a Safety Data Sheet (SDS, formerly MSDS) is often required by customs authorities to assess potential hazards and ensure compliance with chemical regulations (e.g., TSCA in the U.S., REACH in the EU). A Certificate of Analysis (CoA) may also be requested to verify the purity and composition of the chemical. If claiming preferential duty rates, a Certificate of Origin or origin declaration is mandatory. Importers should also be prepared for potential import license requirements depending on the specific compound and destination country's regulations.