HS 350790 Other
Quick Answer: Enzymes not elsewhere specified, imported under HS 350790, enter the UK duty-free, the EU at rates up to 6.30% ad valorem, and the US at rates up to 25% ad valorem. This residual classification applies to enzymes that do not fit into the more specific categories within HS 3507, such as those for food or animal feed preparation. Importers should consult specific national tariff schedules for precise duty rates, as variations exist. According to CustomTariffs data, due diligence is crucial to ensure correct classification and avoid potential penalties.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3507900000 | — | — | — |
| 3507909000 | — | — | — |
| 3507909030 | 0.00 % | — | — |
| 3507903000 | 0.00 % | — | — |
| 3507909010 | 0.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3507900000 | — | — | — |
| 3507903000 | 0.00 % | — | — |
| 3507909000 | — | — | — |
| 3507909010 | 6.30 % | — | — |
| 3507909090 | 0.00 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3507902000 | Free | — | ["kg"] |
| 350790 | — | — | — |
| 3507907000 | Free | — | ["kg"] |
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.
How Has Trade Volume Developed?
Trade Volume 2023
How to Classify This HS Code?
What products does HS 350790 cover?
This subheading covers enzymes and other products of HS heading 3507 that are not specifically enumerated in subheadings 3507.10 through 3507.90. According to the World Customs Organization's Harmonized System Nomenclature, this category includes enzymes derived from animal or vegetable sources, as well as microbial enzymes, when they are not specifically classified elsewhere. For example, certain proteases, amylases, and lipases not falling under more specific descriptions within 3507 would be classified here, provided they meet the definition of enzymes as biologically active proteins that catalyze chemical reactions.
What falls outside HS 350790?
The following products are excluded from HS 350790: enzymes specifically listed in other subheadings of 3507, such as rennet and its concentrates (3507.10), pancreatic enzymes (3507.20), and enzymes of microbial origin for specific industrial uses (e.g., amyloglucosidase for starch conversion, often classified under 3507.90.0000 in some national tariffs). Also excluded are preparations of enzymes with other active substances, which would be classified based on their principal characteristic. For instance, enzyme-based cleaning preparations are typically classified under Chapter 34.
What are common classification mistakes for HS 350790?
A common error is misinterpreting the scope of "other" enzymes. Importers may incorrectly classify highly specific or industrially significant enzymes under 350790 when a more precise subheading exists within HS 3507 or even in other chapters, particularly if the enzyme is part of a mixture or preparation. Adherence to the General Rules for the Interpretation of the Harmonized System (GRI), especially GRI 1 and GRI 3, is crucial to ensure correct classification based on the most specific heading and then the most specific subheading.
How should importers classify products under HS 350790?
The correct procedure for classifying products under HS 350790 involves a thorough review of the product's composition and intended use. Importers and customs brokers must consult the official tariff schedule of the importing country, such as the USITC Harmonized Tariff Schedule (HTS) or the EU TARIC database, and cross-reference with the WCO Explanatory Notes for HS 3507. If the product is an enzyme not specifically listed in subheadings 3507.10 through 3507.80, and it is not a preparation classified elsewhere, then 3507.90 is likely appropriate.
How is the duty calculated for products under HS 350790?
A shipment of 100 kilograms of a microbial amylase, declared at a customs value of $5,000 USD, would attract a US duty of $150.00. This is calculated using the Most Favored Nation (MFN) duty rate of 3.0% ad valorem, applied to the declared value. The calculation is: 3.0% × $5,000 USD = $150.00. This rate is published in the USITC Harmonized Tariff Schedule for subheading 3507.90.0000.
Which trade agreements reduce duties for HS 350790?
Several free trade agreements may reduce the applicable duty rate for HS 350790, including the United States-Mexico-Canada Agreement (USMCA), which can provide for duty-free entry for qualifying goods originating from Canada or Mexico. Additionally, the Generalized System of Preferences (GSP) may offer reduced or duty-free rates for eligible products from designated developing countries. To claim preferential treatment under USMCA, a valid Certificate of Origin is typically required. For GSP, a GSP Form A or a self-certified origin statement may be necessary, depending on the importing country's regulations.
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FAQ
What are the typical import duty rates for products classified under HS code 350790 (Other enzymes)?
Import duty rates for HS code 350790, which covers 'Other' enzymes not specified elsewhere in heading 3507, vary significantly by country. For example, under the US Harmonized Tariff Schedule (HTS), the Most Favored Nation (MFN) rate is often 0.00% ad valorem. However, other countries may apply different rates. The EU TARIC database and the UK Trade Tariff show a range of duties, sometimes including specific rates or higher ad valorem percentages depending on the specific enzyme and origin. Always consult the specific tariff schedule of the importing country for the definitive rate.
How is the classification of 'Other' enzymes under HS 350790 determined?
HS code 350790 is a residual category for enzymes. Classification is determined by a process of elimination: if an enzyme does not fall under specific subheadings within 3507 (e.g., rennet, pepsin, amylases, proteases), it is classified here. The World Customs Organization (WCO) Harmonized System Explanatory Notes provide guidance, emphasizing that these are products obtained from a plant, animal, or microorganism, possessing specific catalytic action. Importers must ensure the product is indeed an enzyme and not classifiable elsewhere in Chapter 35 or other chapters before using this code.
What documentation is typically required for importing enzymes under HS 350790?
Beyond standard import documentation such as a commercial invoice, packing list, and bill of lading, importers of enzymes under HS 350790 may need to provide a Certificate of Analysis (CoA) from the manufacturer. This document should detail the enzyme's identity, purity, activity, and origin. Depending on the enzyme's intended use (e.g., food processing, pharmaceuticals), additional certifications related to safety, quality standards (like GMP), or health regulations may be required by the importing country's relevant authorities. Always verify specific requirements with the destination country's customs agency.
Do trade agreements, such as USMCA or EU Free Trade Agreements, impact the duty rates for HS 350790?
Yes, trade agreements can significantly impact duty rates for HS 350790. For instance, if an enzyme classified under 350790 originates from a country that is a party to a Free Trade Agreement (FTA) with the importing country (e.g., an EU member state exporting to the UK under the EU-UK Trade and Cooperation Agreement, or a USMCA country exporting to the US), it may qualify for preferential duty rates, often 0.00% ad valorem or a reduced rate. To claim preferential treatment, importers typically need a valid Certificate of Origin and must ensure the product meets the rules of origin stipulated in the agreement.
How is the import duty calculated for an enzyme under HS 350790 if a specific ad valorem rate applies?
The duty calculation for an enzyme under HS 350790 with an ad valorem rate is based on the customs value of the imported goods. The formula is: Duty Amount = Customs Value × Ad Valorem Duty Rate. For example, if a shipment of 'other' enzymes has a declared customs value of $10,000 USD and the applicable MFN ad valorem duty rate is 6.30%, the import duty would be $10,000 USD × 0.0630 = $630 USD. It is crucial to use the correct customs value, which typically includes the cost of the goods, insurance, and freight (CIF) up to the point of importation.