HS 293410 Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure
Quick Answer: HS code 293410 covers organic chemical compounds characterized by an unfused thiazole ring in their molecular structure, whether or not hydrogenated. This includes a range of synthetic organic chemicals, often intermediates for pharmaceuticals, agrochemicals, or dyes. Importers should note the varying duty rates: the UK generally applies a 6.00% ad valorem duty, while the EU's Common Customs Tariff typically sets a 6.50% ad valorem rate. For the US, rates vary significantly, from 6.5% ad valorem to duty-free under various preferential trade agreements (e.g., A+, AU, CL, KR), and in some cases, a compound duty of 15.4¢/kg + 52%. Importers and customs brokers must verify the specific subheading and origin to determine the applicable duty, leveraging free trade agreements where possible to optimize costs.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2934100010 | 6.00 % | — | — |
| 2934100035 | 6.00 % | — | — |
| 2934100060 | 6.00 % | — | — |
| 2934100000 | — | — | — |
| 2934100020 | 6.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2934100000 | — | — | — |
| 2934100010 | 6.50 % | — | — |
| 2934100020 | 6.50 % | — | — |
| 2934100035 | 6.50 % | — | — |
| 2934100045 | 6.50 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 293410 | — | — | — |
| 2934102000 | 6.5% | Free (18 programs) | ["kg"] |
| 2934109000 | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) 3.25% (1 programs) | ["kg"] |
| 2934101000 | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) 3.25% (1 programs) | ["kg"] |
| 2934107000 | Free | — | ["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 2934.10?
Imports of Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure 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 (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) 3.25% for USMCA, KORUS, and 17 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 to Classify This HS Code?
What products does HS 293410 cover?
This subheading covers heterocyclic compounds whose structure incorporates an unfused thiazole ring, whether or not that ring is hydrogenated. The thiazole ring is a five-membered ring containing one sulfur atom and one nitrogen atom, separated by a carbon atom. This specific classification is derived directly from the Harmonized System Nomenclature, as interpreted by the World Customs Organization (WCO), and is consistently applied across national tariffs such as the US Harmonized Tariff Schedule (HTS) and the EU TARIC. Examples include 2-aminothiazole and its derivatives, provided the thiazole ring itself is not fused to another ring system within the molecule.
What falls outside HS 293410?
The following products are excluded from HS 293410: compounds where the thiazole ring is fused with another ring system, which would typically fall under other subheadings within Heading 2934 or even other chapters depending on the overall chemical structure. For instance, benzothiazoles, where the thiazole ring is fused to a benzene ring, are specifically excluded from this subheading and are classified under HS 2934.20. Additionally, compounds that are primarily antibiotics, even if they contain a thiazole ring, are generally classified in Chapter 29 under specific antibiotic subheadings, or in Chapter 30 if they are presented in measured doses or for retail sale as medicaments.
What are common classification mistakes for HS 293410?
A common error is misclassifying compounds containing a fused thiazole ring, such as benzothiazole, under HS 293410, despite the explicit "unfused" criterion. This often stems from a superficial review of the chemical name without a detailed understanding of the molecular structure. Another frequent mistake involves overlooking the primary function or nature of the compound; for example, certain vitamins or provitamins containing an unfused thiazole ring might be more specifically classified under HS 2936, based on their vitamin characteristics, rather than solely on the heterocyclic structure. Proper application of General Interpretative Rule (GRI) 1 and GRI 6 is crucial to ensure the most specific subheading is chosen.
How should importers classify products under HS 293410?
The correct procedure for classifying products under HS 293410 involves a meticulous review of the chemical structure to confirm the presence of an unfused thiazole ring, whether hydrogenated or not. Importers and customs brokers should obtain the Chemical Abstracts Service (CAS) number and the full chemical name, along with the structural formula, from the manufacturer. This information should then be cross-referenced with the WCO Explanatory Notes for Heading 2934, as well as official national tariff schedules like the USITC HTS or the EU TARIC, paying close attention to any specific legal notes or rulings. If doubt persists, a binding tariff information (BTI) ruling from the relevant customs authority is highly recommended to ensure compliance and avoid potential penalties.
Which HS Codes Are Related?
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FAQ
What is the Most Favored Nation (MFN) duty rate for HS code 2934.10 in key markets?
The Most Favored Nation (MFN) duty rates for compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure (HS 2934.10) vary by importing country. For example, the general MFN duty rate in the United States is 6.5% ad valorem, as per the Harmonized Tariff Schedule of the United States (HTSUS). In the European Union, the MFN duty rate is 6.5% ad valorem, as specified in the TARIC database. The UK Global Tariff also lists a 6.5% ad valorem rate for this heading. Importers should always verify the current applicable rate with the official customs tariff of the destination country.
What are the key classification criteria for products under HS 2934.10?
HS code 2934.10 specifically covers 'Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure.' The primary classification criterion is the presence of an unfused thiazole ring within the chemical structure. This means the thiazole ring must not be fused with other heterocyclic or carbocyclic rings. The 'whether or not hydrogenated' clause indicates that the saturation level of the thiazole ring does not alter its classification within this subheading. Importers must provide detailed chemical names, CAS numbers, and structural formulas to customs authorities to ensure accurate classification, aligning with the Explanatory Notes to the Harmonized System, Chapter 29.
Which preferential trade agreements offer reduced or duty-free rates for HS 2934.10, and what documentation is required?
Many preferential trade agreements offer reduced or duty-free rates for HS 2934.10. For instance, imports into the United States from countries party to agreements such as the US-Australia Free Trade Agreement (AU), US-Bahrain FTA (BH), US-Chile FTA (CL), US-Colombia TPA (CO), US-Israel FTA (IL), US-Jordan FTA (JO), US-Korea FTA (KR), US-Morocco FTA (MA), US-Oman FTA (OM), US-Panama TPA (PA), and US-Peru TPA (PE) may qualify for duty-free treatment (indicated by 'Free' or specific preference program indicators like A+, D, E, K, P, S, SG in the HTSUS). To claim preferential duty rates, importers typically need to provide a Certificate of Origin (e.g., a USMCA Certificate of Origin for trade with Canada/Mexico, or a free trade agreement certificate specific to the agreement) at the time of import, demonstrating that the goods meet the rules of origin requirements of the respective agreement. Customs brokers should confirm the specific documentation required for each trade agreement.
Are there any specific documentation requirements beyond standard import paperwork for HS 2934.10?
Beyond standard import documentation such as the commercial invoice, packing list, and bill of lading/air waybill, importers of chemical compounds under HS 2934.10 should be prepared to provide additional technical documentation. This may include a Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS), Certificate of Analysis (CoA), and detailed chemical specifications or structural diagrams. These documents help customs authorities verify the chemical identity and composition of the product, ensuring correct classification and compliance with any relevant chemical control regulations (e.g., TSCA in the US, REACH in the EU). For preferential duty claims, a valid Certificate of Origin is mandatory.
Could HS 2934.10 products be subject to additional duties, such as anti-dumping or countervailing duties?
While the general MFN duty rate for HS 2934.10 is 6.5% ad valorem in many jurisdictions, it is possible for specific products within this classification, originating from certain countries, to be subject to additional duties such as anti-dumping duties (ADD) or countervailing duties (CVD). These duties are imposed to counteract unfair trade practices. For example, if a specific thiazole compound from a particular country is found to be dumped or subsidized, the importing country's trade authorities (e.g., U.S. Department of Commerce and International Trade Commission, EU Commission) may impose ADD/CVD. Importers and customs brokers must regularly check official government trade remedy databases (e.g., USITC website for AD/CVD cases, EU TARIC database for additional measures) to determine if any such duties apply to their specific product and country of origin, as these can significantly impact the total landed cost. For instance, some chemical products have seen ADD rates as high as '15.4¢/kg + 52%' in specific cases, though this is not universally applied to all of HS 2934.10.