HS 381900 Based on silicate or phosphoric esters, for use in certain types of aircraft
Quick Answer: Hydraulic brake fluid for aircraft, classified under HS code 381900, enters the UK duty-free, the EU at 6.50% ad valorem, and the US with rates varying from free to 6.5% ad valorem, with some specific trade agreements offering duty-free entry. This classification specifically applies to silicate or phosphoric esters used in certain aircraft. Importers and customs brokers should note the significant duty rate differences between major trading blocs. CustomTariffs aggregates this data, highlighting the need for careful tariff determination based on the destination market.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3819000090 | 0.00 % | — | — |
| 3819000010 | 0.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3819000010 | 6.50 % | — | — |
| 3819000090 | 6.50 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3819000010 | — | — | ["kg"] |
| 3819000090 | — | — | ["kg"] |
| 38190000 | 6.5% | Free (17 programs) | — |
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 3819.00?
Imports of Based on silicate or phosphoric esters, for use in certain types of aircraft 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, 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 to Classify This HS Code?
What products does HS 381900 cover?
This subheading covers specialized chemical preparations based on silicate or phosphoric esters, specifically formulated and intended for use in certain types of aircraft. According to the World Customs Organization (WCO) Harmonized System Nomenclature, these are typically hydraulic fluids, lubricants, or other functional fluids critical for aircraft operation. The US International Trade Commission (USITC) Harmonized Tariff Schedule (HTS) and the EU's TARIC database confirm this specific application as the defining characteristic for classification under 381900, distinguishing them from general-purpose industrial chemicals.
What falls outside HS 381900?
The following products are excluded from HS 381900: general-purpose hydraulic fluids not specifically designated for aircraft, industrial lubricants, brake fluids for automotive use, and any silicate or phosphoric esters not meeting the stringent requirements for aviation applications. For instance, a silicate ester used as a plasticizer in manufacturing would be classified elsewhere, likely under heading 3824. Similarly, phosphoric esters used as flame retardants in textiles would not fall under this specific aircraft-related code.
What are common classification mistakes for HS 381900?
A common error is classifying aircraft-specific silicate or phosphoric esters under more general headings within Chapter 38, such as 3824, if the specific end-use in aircraft is not clearly identified or documented. This often occurs when the product's technical specifications are not fully understood or when the importer relies solely on the chemical composition without considering the intended application. According to General Rule of Interpretation (GRI) 1, the title of a Section, Chapter, or Subheading is of only relative value, but the terms of the heading and subheading are paramount.
How should importers classify products under HS 381900?
The correct procedure for classifying products under HS 381900 involves a thorough review of the product's technical data sheets, safety data sheets (SDS), and any manufacturer declarations confirming its intended use in aircraft. Importers and customs brokers must verify that the chemical composition (silicate or phosphoric esters) and the specific application (certain types of aircraft) align precisely with the WCO HS Explanatory Notes and national tariff interpretations. Obtaining a binding ruling from customs authorities is advisable for complex or novel products.
How is the duty calculated for products under HS 381900?
A shipment of "Aeroshell Fluid 41," a common hydraulic fluid for aircraft, weighing 50 liters and declared at a customs value of $1,500 USD would attract a US duty of $150.00. This is calculated using the Most Favored Nation (MFN) duty rate of 10% ad valorem, applied to the declared customs value ($1,500 USD × 10% = $150.00). This calculation is based on the duty rate published in the USITC Harmonized Tariff Schedule for HS code 381900.
Which trade agreements reduce duties for HS 381900?
Several free trade agreements may reduce the applicable duty rate for HS 381900, including the United States-Mexico-Canada Agreement (USMCA). Under USMCA, originating products from Canada and Mexico can benefit from a preferential rate of Free. To claim this preference, a valid USMCA Certificate of Origin is typically required. While not directly applicable to this specific product, general GSP schemes might offer reduced rates for certain developing countries, requiring a GSP Form A.
```Which HS Codes Are Related?
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FAQ
What are the typical import duty rates for HS code 381900, specifically for products based on silicate or phosphoric esters used in aircraft?
The Most Favored Nation (MFN) duty rate for HS code 381900 is typically 6.50% ad valorem. However, preferential duty rates are available for imports from countries with specific trade agreements. For example, under agreements with Australia (AU), Canada (CA - not listed but often has preferential rates), Chile (CL), South Korea (KR), and Singapore (SG), the duty rate can be Free. It is crucial to consult the relevant tariff schedule for the importing country to confirm the exact rate applicable to your origin country. For instance, the USITC Tariff Schedule provides detailed rates for various trade partners.
What are the key classification criteria for assigning goods to HS code 381900?
To be classified under HS code 381900, the product must meet two primary criteria: 1) It must be a preparation based on silicate or phosphoric esters. These are chemical compounds often used as lubricants, hydraulic fluids, or fire retardants. 2) It must be specifically intended for use in certain types of aircraft. This intended use is a critical factor and may require supporting documentation from the manufacturer or end-user to substantiate the aircraft application.
How is the import duty calculated for HS code 381900, and can you provide an example?
The duty calculation for HS code 381900 is typically based on the ad valorem (ad val.) system, meaning a percentage of the declared customs value of the goods. For example, if the MFN duty rate is 6.50% ad valorem, and you import a shipment valued at $10,000 USD, the import duty would be calculated as: $10,000 (value) × 0.065 (duty rate) = $650 USD. Some specific tariffs might include a combination of ad valorem and specific duties (e.g., 3.7¢/kg + 60%), so always verify the exact duty calculation basis in the applicable tariff schedule.
What documentation is typically required when importing goods under HS code 381900?
When importing products classified under HS code 381900, standard import documentation is required, including a commercial invoice, packing list, and bill of lading or air waybill. Crucially, to substantiate the aircraft use, importers may need to provide a manufacturer's affidavit, a technical data sheet specifying the product's composition and intended application, or a letter from the aircraft manufacturer or operator confirming its use. This documentation helps customs authorities verify that the goods meet the specific criteria for this HS code and are eligible for any claimed preferential duty rates.
Which common trade agreements offer preferential duty rates for HS code 381900?
Several trade agreements provide preferential duty rates, often resulting in Free entry, for HS code 381900. These include agreements with countries such as Australia (AU), Chile (CL), Israel (IL), Jordan (JO), South Korea (KR), Morocco (MA), Oman (OM), Peru (PE), and Singapore (SG). The specific terms and conditions, including rules of origin, must be met to benefit from these agreements. Importers should consult the preferential tariff schedules of the importing country, such as the EU TARIC database for European Union trade agreements, to confirm eligibility and requirements.