HS 293159 Other

Quick Answer: HS code 2931.59, "Other," encompasses a diverse range of organo-inorganic compounds not specifically classified elsewhere within subheading 2931.50. These are complex chemical compounds containing both organic and inorganic components, often used in specialized industrial applications, pharmaceuticals, and research. Duty rates vary significantly by jurisdiction and specific product. In the UK, rates range from 0.00% to 6.00% ad valorem. The EU applies rates such as 0.00% or 6.50% ad valorem. For the US, rates include 3.7% ad valorem, with many products eligible for "Free" duty under various preferential trade agreements (e.g., A, AU, BH, CL). However, certain items may face a 25% ad valorem duty. Importers and customs brokers must verify the exact 10-digit tariff line and applicable trade agreements to determine the precise duty liability and ensure compliance.

What Are the Import Duty Rates?

🇬🇧 United Kingdom

Code MFN Preferential Unit
2931590000
2931599000
2931599090 0.00 %
2931591000 6.00 %
2931599050 6.00 %

🇪🇺 European Union (TARIC)

Code MFN Preferential Unit
2931599000
2931590000
2931591000 6.50 %
2931599050 6.50 %
2931599090 0.00 %

🇺🇸 United States (HTSUS)

Code MFN Preferential Unit
29315900 3.7% Free (18 programs)
2931590015 ["kg"]
2931590025 ["kg"]
2931590035 ["kg"]
2931590080 ["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 2931.59?

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 15 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?

How to Classify This HS Code?

What products does HS 293159 cover?

This subheading covers other organo-inorganic compounds containing non-metals, specifically those not elsewhere specified or included within the more specific subheadings of Heading 2931. According to the Harmonized System Explanatory Notes (HSEN) for Heading 2931, this category encompasses complex chemical compounds where an organic molecule is directly bonded to an inorganic element other than hydrogen, oxygen, nitrogen, or carbon, and where that inorganic element is a non-metal. This includes a diverse range of synthetic organic chemicals with specific non-metal components, such as phosphorus, sulfur, or silicon, provided they are not specifically enumerated in other subheadings under 2931. The USITC Harmonized Tariff Schedule (HTS) and EU TARIC further define this as a residual category for such compounds.

What falls outside HS 293159?

The following products are excluded from HS 293159: organo-sulfur compounds (e.g., thiols, thioethers) classified under Heading 2930, organo-mercury compounds classified under 2931.41, organo-tin compounds classified under 2931.42, and other specific organo-inorganic compounds of metals or non-metals that are explicitly provided for in other subheadings of Heading 2931, such as 2931.10 (organo-phosphorus compounds) or 2931.20 (organo-silicon compounds). Furthermore, simple inorganic compounds containing organic impurities, or mixtures where the organic and inorganic components are not chemically bonded in an organo-inorganic structure, would also be excluded, as they do not meet the fundamental chemical definition of Heading 2931.

What are common classification mistakes for HS 293159?

A common error is misclassifying complex organic compounds containing non-metals that are not directly bonded in an organo-inorganic structure, or conversely, classifying simple mixtures under this heading. Another frequent mistake involves overlooking more specific subheadings within 2931, such as 2931.10 for organo-phosphorus compounds or 2931.20 for organo-silicon compounds, and defaulting to 2931.59 prematurely. This often violates General Interpretative Rule (GRI) 6, which mandates classification at the most specific subheading. Importers sometimes also confuse organo-inorganic compounds with simple salts of organic acids or bases, which are typically classified under other chapters, such as Chapter 29 for organic chemicals or Chapter 28 for inorganic chemicals, depending on their specific chemical structure.

How should importers classify products under HS 293159?

The correct procedure for classifying products under HS 293159 involves a meticulous review of the chemical structure to confirm the presence of a direct bond between an organic radical and a non-metal element (other than C, H, O, N). Importers and customs brokers must first consult the WCO Harmonized System Explanatory Notes for Heading 2931 to understand the scope and exclusions. Subsequently, they must systematically rule out all other specific subheadings within Heading 2931 (e.g., 2931.10, 2931.20, 2931.30, 2931.41, 2931.42, 2931.49) to ensure the "other" category is appropriate. Chemical analysis reports, safety data sheets (SDS), and detailed manufacturing process descriptions are crucial supporting documents to accurately determine the chemical identity and ensure compliance with GRI 1 and 6, thereby avoiding misclassification and potential penalties.

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FAQ

What is the Most Favored Nation (MFN) duty rate for HS 2931.59, and how do preferential rates apply?

The Most Favored Nation (MFN) duty rates for HS 2931.59 ('Other' organo-inorganic compounds) can vary significantly by importing country. For example, the United States MFN duty rate is 3.7% ad valorem. In contrast, some countries, such as those in the European Union, might apply a 6.5% ad valorem MFN rate, while others could be 0.00% or 6.00%. Importers should always verify the specific MFN rate applicable in their destination country's tariff schedule (e.g., USITC Harmonized Tariff Schedule, EU TARIC). Preferential duty rates are often available under various Free Trade Agreements (FTAs). For instance, imports into the US from countries like Australia (AU), Bahrain (BH), Chile (CL), Colombia (CO), Israel (IL), Jordan (JO), Korea (KR), Morocco (MA), Oman (OM), Panama (PA), Peru (PE), and Singapore (SG) may qualify for a 'Free' duty rate under their respective FTAs, provided all rules of origin are met. It is crucial to consult the specific FTA's rules of origin and provide the necessary documentation (e.g., certificate of origin) to claim preferential treatment.

What are the key classification criteria for products under HS 2931.59, 'Other'?

HS 2931.59 is a residual subheading for 'Other' organo-inorganic compounds, meaning it covers compounds not specifically provided for in subheadings 2931.51 through 2931.54. The primary classification criterion for any product under Chapter 29 is its chemical structure and function. For 2931.59, a product must be an organo-inorganic compound, which by WCO Explanatory Note definition, contains at least one carbon atom and at least one bond between carbon and a metal or non-metal atom other than hydrogen, oxygen, nitrogen, or sulfur, and is not covered by more specific headings or subheadings within Chapter 29. Importers must ensure the chemical name, CAS number, and structural formula clearly demonstrate it is an organo-inorganic compound and does not fit a more specific classification elsewhere in the Harmonized System. If a product has multiple functions, classification will be determined by its principal function or by application of General Interpretative Rule 3.

What documentation is typically required for importing goods classified under HS 2931.59?

Standard import documentation for HS 2931.59 includes a commercial invoice, packing list, bill of lading or air waybill, and a customs declaration. For chemical products, additional documentation is often critical. This may include a Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) providing details on chemical composition, hazards, and safe handling. A Certificate of Analysis (CoA) confirming the purity, concentration, and specifications of the compound is also frequently requested by customs authorities or for regulatory compliance. If claiming preferential duty rates under a Free Trade Agreement, a valid Certificate of Origin (e.g., NAFTA/USMCA Certificate, KORUS FTA Certificate) or an origin declaration is mandatory. Importers should also be prepared to provide detailed chemical nomenclature and structural diagrams if requested by customs to verify classification.

Are there any specific trade agreements that offer significant duty reductions or exemptions for HS 2931.59?

Yes, numerous Free Trade Agreements (FTAs) provide significant duty reductions or exemptions for products classified under HS 2931.59. For example, the United States has FTAs with countries such as Australia, Bahrain, Chile, Colombia, Israel, Jordan, Korea, Morocco, Oman, Panama, Peru, and Singapore, which typically grant 'Free' duty rates for eligible goods originating from these partner countries. Similarly, the European Union's extensive network of FTAs (e.g., with Canada, Japan, South Korea, Mercosur) may also offer preferential treatment. The UK Trade Tariff also lists various preferential agreements. To benefit from these, importers must ensure the goods meet the specific rules of origin outlined in the respective trade agreement and provide the required proof of origin. It is essential to consult the specific FTA text and the importing country's tariff schedule for the exact conditions and documentation requirements.

Could HS 2931.59 products be subject to additional duties, such as Section 301 or anti-dumping duties?

Yes, products classified under HS 2931.59, like many other imported goods, could potentially be subject to additional duties beyond the standard MFN or preferential rates. For instance, the United States has imposed Section 301 duties on certain goods originating from China. While not all products under 2931.59 would be affected, importers must verify if their specific chemical compound, based on its country of origin, falls under any active Section 301 lists. Similarly, anti-dumping (AD) or countervailing duties (CVD) could be in effect for specific organo-inorganic compounds if they are found to be dumped or unfairly subsidized by certain countries. These duties are product- and country-specific and are typically imposed after an investigation by trade authorities (e.g., U.S. Department of Commerce and International Trade Commission). Importers should regularly check official customs announcements and trade remedy databases to ensure compliance.