HS 850630 Mercuric oxide
Quick Answer: Mercuric oxide imported under HS 850630 enters the UK at 4.00%, the EU at 4.70%, and the US at 2.7% (MFN). This HS code specifically covers mercuric oxide, a compound of mercury and oxygen, often used in batteries and as a catalyst. Importers should be aware of varying tariff rates across major markets, as indicated by CustomTariffs data. Additionally, the US offers duty-free entry for certain trading partners, while also imposing a significantly higher rate for others, highlighting the importance of verifying specific preferential trade agreements. Exporters and customs brokers must ensure accurate classification and documentation to benefit from applicable rates and avoid potential penalties.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 8506300000 | 4.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 8506300000 | 4.70 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 8506301000 | 2.7% | Free (17 programs) | ["No."] |
| 850630 | — | — | — |
| 8506305000 | 2.7% | Free (17 programs) | ["No."] |
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 8506.30?
Imports of Mercuric oxide 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 14 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 850630 cover?
This subheading covers mercuric oxide, a chemical compound with the formula HgO. According to the World Customs Organization (WCO) Harmonized System Nomenclature, this classification applies to mercury oxides in their various forms. Official definitions from sources like the USITC Harmonized Tariff Schedule (HTS) and the EU's TARIC database confirm that pure mercuric oxide and its mixtures, when primarily functioning as mercuric oxide, fall under this specific code, excluding finished articles incorporating it.
What falls outside HS 850630?
The following products are excluded from HS 850630: finished goods such as batteries (which may contain mercuric oxide but are classified under their respective battery headings, e.g., 8506.10), mercury compounds not specifically mercuric oxide, or preparations where mercuric oxide is not the principal component. For instance, mercury-containing pharmaceuticals or laboratory reagents would be classified based on their primary function or composition under different headings, not as raw mercuric oxide.
What are common classification mistakes for HS 850630?
A common error is misclassifying mercury-containing preparations or finished articles as pure mercuric oxide. For example, mercury-based pesticides or medical devices containing mercury might be incorrectly entered under 8506.30. According to General Rule of Interpretation (GRI) 1, classification is determined by the terms of the heading and any relative section or chapter notes. If a product is a composite good or mixture, it should be classified according to the principles outlined in GRI 3, often by essential character.
How should importers classify products under HS 850630?
The correct procedure for classifying products under HS 850630 involves a thorough examination 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 HTS or the UK Trade Tariff. They should verify that the product is indeed mercuric oxide and not a finished article or a different mercury compound. Reviewing the WCO Explanatory Notes for Heading 8506 is also crucial for accurate determination.
How is the duty calculated for products under HS 850630?
A shipment of 100 kilograms of mercuric oxide, declared at a customs value of $5,000 USD, would attract a US duty of $250.00. This is calculated using the Most Favored Nation (MFN) duty rate of 5.0% ad valorem, applied to the declared value ($5,000 USD × 0.05 = $250.00). This rate is published in the USITC Harmonized Tariff Schedule, specifically under HTSUS subheading 8506.30.0000.
Which trade agreements reduce duties for HS 850630?
Several free trade agreements may reduce the applicable duty rate for HS 850630, including the United States-Mexico-Canada Agreement (USMCA). Under USMCA, originating mercuric oxide from Canada or Mexico would typically enter the United States duty-free. To claim this preference, a valid USMCA Certificate of Origin or a self-certified origin statement meeting the agreement's requirements must be provided to customs authorities. Other agreements may offer reduced rates depending on the origin country.
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FAQ
What are the typical import duty rates for HS code 850630 (Mercuric oxide) into the United States?
The standard Most Favored Nation (MFN) duty rate for mercuric oxide (HS 850630) into the United States is 4.00% ad valorem. However, preferential duty rates may apply under various trade agreements. For example, goods originating from countries like Australia (AU), Chile (CL), or South Korea (KR) may enter duty-free. It is crucial to verify the specific origin of the goods and consult the latest USITC tariff schedule for definitive rates.
How is the import duty for mercuric oxide calculated in the US, and can you provide an example?
The import duty for mercuric oxide (HS 850630) into the United States is typically calculated on an ad valorem basis, meaning it's a percentage of the declared value of the goods. For instance, if a shipment of mercuric oxide is valued at $10,000 USD and the MFN duty rate is 4.00%, the duty would be calculated as: $10,000 (value) × 0.04 (duty rate) = $400 USD. Importers must ensure accurate valuation and classification to avoid penalties.
What documentation is typically required when importing mercuric oxide (HS 850630) into the EU?
When importing mercuric oxide (HS 850630) into the European Union, standard customs documentation is required, including a commercial invoice, packing list, and bill of lading or air waybill. Depending on the specific use and quantity, additional documentation related to chemical regulations, such as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals), may be necessary. Importers should consult the EU's TARIC database and national competent authorities for specific import license or notification requirements, especially given mercury's controlled status.
Which trade agreements offer preferential duty rates for HS code 850630 into the UK, and how can I determine eligibility?
The United Kingdom maintains preferential trade agreements with various countries that can reduce or eliminate import duties on goods classified under HS 850630 (Mercuric oxide). For example, agreements with countries like Australia (AU) or Chile (CL) may offer duty-free entry. To determine eligibility, importers must possess a valid Proof of Origin (e.g., a declaration of origin on an invoice or a movement certificate) issued by the exporting country, certifying that the goods meet the rules of origin stipulated in the relevant trade agreement. The UK Trade Tariff provides detailed information on preferential rates and origin requirements.
Are there any specific classification criteria or restrictions for HS 850630 (Mercuric oxide) that importers should be aware of?
HS code 850630 specifically covers mercuric oxide. Classification hinges on the chemical composition and form of the product. Importers must ensure that the product is indeed mercuric oxide and not a compound or mixture that might fall under a different HS code. Due to mercury's hazardous nature and environmental concerns, the import and use of mercuric oxide may be subject to specific national and international regulations, such as the Minamata Convention on Mercury. Importers should verify compliance with all applicable environmental, health, and safety regulations in the importing country.