Fuel Rust Preventive Agent
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3403191000 | 35.2% | CN | US | Official Doc |
| 3403195000 | 40.8% | CN | US | Official Doc |
| 3811210000 | 41.5% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
| 3824994900 | 41.5% | CN | US | Official Doc |
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AI Analysis
π’οΈ Fuel Rust Preventive Agent (Hydraulic Oil Rust Preventive Agent)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Strategic Clearance Strategy for Chemical Additives
π I. Product Definition & Classification: What Exactly is "Fuel/Hydraulic Oil Rust Preventive Agent"?
In international trade, Rust Preventive Agents (often marketed as additives for hydraulic oil, fuel, or mineral oil) are complex chemical mixtures designed to protect metal surfaces from corrosion. Their classification depends entirely on their chemical composition and primary function.
Two Main Categories: 1. Specific Mineral Oil/Asphalt Base (Chapters 3403): Products explicitly described as preparations for treating mineral oils or asphaltic minerals. These are often classified under 3403.19. 2. General Chemical Preparations (Chapter 38): Products that act as lubricant additives, hydrocarbon-based mixtures, or "catch-all" chemical preparations not specifically detailed elsewhere. These are often classified under 3811.21 or 3824.99.
β οΈ Critical Distinction Point:
- If the product is explicitly a preparation for treating mineral oils with a base of petroleum/mineral oil β 3403.19
- If the product is an additive for lubricants or a general chemical mixture β 3811.21 or 3824.99
- Note: Many traders use "Fuel Rust Preventive" colloquially, but customs looks at the technical formulation.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Mapping)
| HS Code | Product Description | Applicable Scenario | Key Component/Function |
|---|---|---|---|
3403.19.10.00 |
Rust preventive agents, matching rust preventive uses, containing petroleum oils or bituminous minerals | Standard hydraulic oil rust inhibitors | β Base: Petroleum/Mineral Oil |
3403.19.50.00 |
Rust preventive agents, matching rust preventive uses, containing petroleum oils or bituminous minerals | Alternative classification for specific mineral oil bases | β Base: Petroleum/Bituminous Minerals |
3811.21.00.00 |
Rust preventive agents, classified as lubricant additives, for the preparation of mineral oil liquids | Industrial lubricant additives | β Function: Lubricant Additive |
3824.99.29.00 |
Rust preventive agents, classified as chemical preparations, catch-all category for chemical mixtures | General chemical mixtures not elsewhere specified | β Nature: Chemical Mixture |
3824.99.49.00 |
Rust preventive agents, classified as chemical mixtures composed of hydrocarbons | Hydrocarbon-based chemical blends | β Nature: Hydrocarbon Mixture |
π Key Reminder:
- 3403.19 applies when the product is primarily defined as a treatment for mineral oils.
- 3811 and 3824 apply when the product is an additive or a general chemical mixture.
- Misclassification Risk: Declaring a complex chemical mixture (3824) as a simple mineral oil treatment (3403) can lead to customs audits if the SDS (Safety Data Sheet) reveals complex synthetic additives.
π° III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Surcharges)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: 2025 November 10 onwards (including subsequent imports)
π― 1. 3403.19.10.00 & 3403.19.50.00 ββ Rust Preventive Agents (Mineral Oil Base)
| Item | Content |
|---|---|
| Base Duty | 0.2% (for .10) / 5.8% (for .50) |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax (122 Clause) | +10.0% |
| Total Effective Rate | 35.2% (for .10) / 40.8% (for .50) |
| Tax Calculation | CIF Value Γ Total Rate |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | USITC:3403.19.10.00 β Footnote: Section 301 β IEEPA:122 Clause |
π Explanation:
- These codes benefit from a very low base duty (especially .10 at 0.2%).
- However, the 35.2% - 40.8% total rate is significant due to theε ε (stacking) of Section 301 and IEEPA surcharges.
- Strategy: If your product fits the strict definition of "preparation for treating mineral oils," 3403.19.10.00 is the lowest cost option (35.2%) among all choices.
π― 2. 3811.21.00.00 ββ Lubricant Additives
| Item | Content |
|---|---|
| Base Duty | 6.5% |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax (122 Clause) | +10.0% |
| Total Effective Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | USITC:3811.21.00.00 β Footnote: Section 301 β IEEPA:122 Clause |
π Note:
- If customs determines your product is primarily a lubricant additive rather than a mineral oil treatment, it may default to 3811.
- The rate (41.5%) is slightly higher than the cheapest 3403 option but lower than other 3824 variants.
π― 3. 3824.99.29.00 & 3824.99.49.00 ββ General Chemical Mixtures (Hydrocarbons)
| Item | Content |
|---|---|
| Base Duty | 6.5% |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax (122 Clause) | +10.0% |
| Total Effective Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | USITC:3824.99.29.00 / 3824.99.49.00 β Footnote: Section 301 β IEEPA:122 Clause |
π Warning:
- These are "catch-all" codes. Customs may prefer these only if no more specific code applies.
- 3824.99.49.00 is specific to "hydrocarbon mixtures." If your product is not purely hydrocarbon-based, this code is risky.
- Rate is 41.5%, same as 3811, but higher than the optimal 3403.19.10.00.
π οΈ IV. Customs Clearance Practical Advice (Avoiding Pitfalls)
β 1. Required Documentation Checklist
| Document | Mandatory? | Explanation |
|---|---|---|
| β Safety Data Sheet (SDS) | βοΈ CRITICAL | Must clearly state chemical composition, base ingredients (petroleum vs. synthetic), and primary function (rust prevention vs. lubrication). |
| β Product Specification Sheet | βοΈ | Details viscosity, additive package, and intended application (e.g., "for hydraulic systems"). |
| β Commercial Invoice | βοΈ | Must accurately describe the product (e.g., "Hydraulic Oil Rust Preventive Agent, HS Code 3403.19.10"). |
| β Origin Certificate (CO) | βοΈ | Proves Chinese origin; essential for applying correct surcharges. |
| β Customs Ruling (if available) | βοΈ | If you have a prior CBP ruling, include it to support your HS Code choice. |
β 2. Declaration Strategy (Key Mantra)
π₯ βBase Defines Code, Function Defines Rate! Don't Mix Mineral Oil with Chemical Mixtures!β
| Scenario | Correct Declaration | Incorrect Declaration | Risk |
|---|---|---|---|
| Product is mainly petroleum-based for treating oil | 3403.19.10.00 |
3824.99.49.00 |
Overpayment (41.5% vs 35.2%) |
| Product is a synthetic additive for lubricants | 3811.21.00.00 |
3403.19.10.00 |
Misclassification, potential penalty |
| Product is a generic chemical mix | 3824.99.29.00 |
3403.19.50.00 |
Incorrect base duty calculation |
| Split Shipment | One HS Code per shipment | Splitting into multiple HS Codes | Increased scrutiny, higher compliance cost |
β 3. Special Cases Handling
| Situation | Handling Advice |
|---|---|
| OEM/Private Label | Ensure the SDS matches the declarantβs description. If the formula is proprietary, emphasize the base ingredients (e.g., "contains >50% petroleum oil"). |
| Mixed Packaging | If shipped with other chemicals, ensure they are not classified together if they have different HS Codes. |
| Dispute with Customs | If CBP challenges your HS Code, provide a technical justification letter from the manufacturer explaining why it fits 3403 (mineral oil treatment) vs 3811/3824 (additive/mixture). |
π V. Global Market Comparison (2026 Update)
| Country/Region | Recommended HS Code | Base Duty | Total Rate (CN Origin) | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3403.19.10.00 |
0.2% | 35.2% | Lowest among options; requires strict mineral oil definition. |
| πΊπΈ USA | 3811.21.00.00 |
6.5% | 41.5% | Common for lubricant additives. |
| π¨π³ China | 3403.19.10.00 |
0.2% | ~0.2% | Low import duty; no 301/IEEPA surcharges. |
| πͺπΊ EU | 3811.10.00 |
6.5% | ~6.5% | No Section 301/IEEPA; different HS structure. |
| π¦πΊ Australia | 3403.19.00 |
5.0% | ~5.0% | No surcharges; straightforward classification. |
π Conclusion:
- USA is the highest cost market due to 301 + IEEPA surcharges.
- Optimization Strategy: If your product is chemically justified as a mineral oil treatment, 3403.19.10.00 is the best choice to minimize costs (35.2% vs 41.5%).
- China/EU/AU: Focus on accurate functional description to avoid duties.
π VI. Common Errors & Pitfalls (Lessons Learned)
β Error 1: Using 3824.99 as a lazy fallback
π Consequence: Higher duty (41.5%) vs 35.2%; potential customs audit for misclassification.
β Error 2: Declaring "Fuel Additive" but using HS Code for "Hydraulic Oil Treatment"
π Consequence: Mismatch between product name and HS Code function; delays and requests for additional info.
β Error 3: Ignoring IEEPA 122 Clause
π Consequence: Underpayment of 10%; fines and interest.
β Error 4: Not providing SDS
π Consequence: Customs cannot verify composition; product held or reclassified to worst-case scenario.
β Correct Approach:
"Rust Preventive Agent for Hydraulic Oil, Petroleum-Based, HS Code 3403.19.10.00, SDS Attached"
π― VII. Conclusion: Precise Classification Saves Money!
π― Remember the Mantra:
πΉ βPetroleum Base = 3403 (35.2%); Additive = 3811/3824 (41.5%); Choose Wisely!β
πΉ βSDS is King, Function is Queen, HS Code is the Crown!β
π Pro Tip:
If your product is not originally from China (e.g., Vietnam, Thailand), you may avoid IEEPA/301 surcharges, reducing the total rate to Base Duty + 0%.
Consider supply chain diversification if volumes are high.
π£ Immediate Action:
π Consult a licensed customs broker
π Prepare SDS + Product Specs
π Get an Advance Ruling from CBP to secure your HS Code and duty rate.
β¨ Professional clearance starts with precise classification!
πΌ Every percentage point counts in your profit margin!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.