HS 291816 Gluconic acid, its salts and esters
Quick Answer: HS code 291816 specifically covers gluconic acid, its salts (like sodium gluconate), and esters. These organic compounds are widely used in food, pharmaceuticals, and industrial applications as chelating agents, acidulants, and cleaning agents. Importers and exporters should note the varying duty rates across major jurisdictions. In the UK, rates range from 0.00% to 6.00%, while the EU applies rates from 0.00% to 6.50% ad valorem. The US Harmonized Tariff Schedule (HTS) shows a broader range, including 6% and 25% ad valorem, with numerous preferential duty-free provisions under various Free Trade Agreements (e.g., A, AU, CL, KR, MX, SG). Accurate classification is crucial to leverage these trade preferences and ensure compliance.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2918160000 | — | — | — |
| 2918160090 | 0.00 % | — | — |
| 2918160010 | 6.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 2918160000 | — | — | — |
| 2918160010 | 6.50 % | — | — |
| 2918160090 | 0.00 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 291816 | — | — | — |
| 2918161000 | 6% | Free (17 programs) | ["kg"] |
| 29181650 | 3.7% | Free (18 programs) | — |
| 2918165010 | — | — | ["kg"] |
| 2918165020 | — | — | ["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 2918.16?
Imports of Gluconic acid, its salts and esters 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?
Trade Volume 2023
How to Classify This HS Code?
What products does HS 291816 cover?
This subheading covers gluconic acid, its salts, and its esters, as defined by the Harmonized System Nomenclature Explanatory Notes for Heading 2918, specifically subheading 2918.16. Gluconic acid (D-gluconic acid) is an organic compound with the chemical formula C6H12O7, derived from glucose. Its salts include sodium gluconate, calcium gluconate, and potassium gluconate, widely used as chelating agents, food additives, and in pharmaceuticals. Esters of gluconic acid, such as glucono delta-lactone (GDL), which is a cyclic ester of gluconic acid, are also classified here. The USITC Harmonized Tariff Schedule and the EU TARIC system both align with this WCO definition, ensuring consistent global classification for these specific chemical compounds.
What falls outside HS 291816?
The following products are excluded from HS 291816: glucose itself (classified under Heading 1702), which is the precursor to gluconic acid, and other carboxylic acids with additional oxygen functions that are not gluconic acid or its direct derivatives. For instance, ascorbic acid (Vitamin C) is classified under 2936.27, despite also being an organic acid with oxygen functions. Similarly, preparations containing gluconic acid or its salts in mixtures, such as pharmaceutical formulations or food preparations where the gluconic acid component is not the sole or principal characteristic, would typically be classified elsewhere, often in Chapters 30 or 21, respectively, based on their primary function and composition.
What are common classification mistakes for HS 291816?
A common error is misclassifying glucono delta-lactone (GDL) as a lactone of Heading 2932, rather than as an ester of gluconic acid under 291816. While GDL is a lactone, its specific chemical structure as a cyclic ester of gluconic acid places it squarely within the scope of "esters" of gluconic acid. Another mistake involves classifying mixtures or preparations containing gluconic acid salts, such as a calcium gluconate supplement, directly under 291816 when the product is clearly a medicament or food supplement. Such items are typically classified under Chapter 30 (Pharmaceutical Products) or Chapter 21 (Miscellaneous Edible Preparations) according to General Interpretative Rule (GRI) 3(b), as the gluconate is part of a formulated product.
How should importers classify products under HS 291816?
The correct procedure for classifying products under HS 291816 involves first verifying the precise chemical identity of the substance. Importers and customs brokers should obtain a Certificate of Analysis (CoA) or Safety Data Sheet (SDS) to confirm the product is indeed gluconic acid, a specific salt (e.g., sodium gluconate, calcium gluconate), or an ester (e.g., glucono delta-lactone). If the product is a mixture or preparation, apply General Interpretative Rule 3(b) to determine if the gluconic acid component imparts the essential character. Always consult the WCO Explanatory Notes for Heading 2918 and cross-reference with the USITC Harmonized Tariff Schedule or EU TARIC for the most current and specific guidance, ensuring the product is not a formulated preparation or a different chemical compound.
Which HS Codes Are Related?
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FAQ
What are the standard Most Favored Nation (MFN) import duty rates for HS code 2918.16 (Gluconic acid, its salts and esters) in major economies?
The MFN duty rates for HS 2918.16 vary significantly by importing country. For instance, the United States generally applies a 'Free' duty rate (0.00% ad valorem) under the Harmonized Tariff Schedule of the United States (HTSUS) for this subheading. In contrast, the European Union's TARIC database indicates a common customs tariff duty rate of 6.50% ad valorem for imports from most third countries. The UK Global Tariff also lists a 6.50% ad valorem duty rate. Importers should always verify the specific MFN rate applicable to their destination country using official tariff databases like the USITC HTSUS, EU TARIC, or the UK Trade Tariff.
Are there any preferential duty rates available for HS 2918.16 under free trade agreements or special programs?
Yes, preferential duty rates are widely available for HS 2918.16, often resulting in duty-free entry, depending on the country of origin and the importing country. For example, the United States grants duty-free treatment (0.00% ad valorem) to imports from numerous countries under various trade agreements and preference programs, including but not limited to 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). Similarly, the EU and UK offer preferential rates under their respective trade agreements (e.g., GSP, FTAs). Importers should consult the rules of origin for specific agreements to determine eligibility and ensure proper documentation, such as a certificate of origin, is provided to claim preferential treatment.
What are the key classification criteria for products under HS 2918.16, specifically distinguishing between gluconic acid, its salts, and esters?
HS 2918.16 covers 'Gluconic acid, its salts and esters'. The classification hinges on the chemical identity of the substance. 'Gluconic acid' refers to the free acid form (C6H12O7). 'Salts' of gluconic acid are formed when the carboxylic acid group reacts with a base, such as sodium gluconate, calcium gluconate, or potassium gluconate. 'Esters' are derivatives formed from gluconic acid and an alcohol, such as glucono delta-lactone (GDL), which is a cyclic ester of gluconic acid. The World Customs Organization (WCO) Explanatory Notes for Chapter 29 provide guidance that derivatives of organic acids, such as salts and esters, generally follow the classification of the parent acid, provided they retain the essential character. Laboratory analysis (e.g., spectroscopy, chromatography) may be required to confirm the exact chemical composition if there is any ambiguity.
What specific documentation is typically required by customs authorities for importing products classified under HS 2918.16?
Standard import documentation for HS 2918.16 includes a commercial invoice, packing list, and bill of lading or air waybill. For chemical products, additional documentation is often required or recommended. This may include a Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) to provide information on the substance's properties and handling. If claiming preferential duty rates under a free trade agreement, a valid Certificate of Origin (e.g., NAFTA/USMCA Certificate, EUR.1, or self-certification by the exporter) is mandatory. Depending on the end-use or specific regulations of the importing country, permits or licenses from health, food, or environmental agencies might also be necessary, especially if the product is intended for pharmaceutical, food, or cosmetic applications.
Are there any common trade agreements that specifically impact the duty rates for gluconic acid and its derivatives (HS 2918.16)?
Yes, numerous bilateral and multilateral trade agreements significantly impact the duty rates for HS 2918.16. For imports into the United States, agreements like the USMCA (United States-Mexico-Canada Agreement), KORUS FTA (Korea-U.S. Free Trade Agreement), and various other FTAs with countries such as Australia, Chile, Colombia, Peru, and Singapore typically grant duty-free access. For the European Union, agreements like the EU-Japan EPA, EU-South Korea FTA, and various Generalized Scheme of Preferences (GSP) arrangements can provide preferential or zero duties. Similarly, the UK has its own network of trade agreements (e.g., with Japan, Canada, Australia) that offer preferential treatment. Importers should identify the specific agreement applicable to their trade lane and ensure compliance with the respective rules of origin to benefit from reduced or zero duties.