抗爆性能改善剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 2942003500 | 41.5% | CN | US | Official Doc |
| 2942005000 | 38.7% | CN | US | Official Doc |
| 3811190000 | 41.5% | CN | US | Official Doc |
| 3811115000 | 35.0% | CN | US | Official Doc |
| 3811115000 | 35.0% | CN | US | Official Doc |
AI Analysis
🛢️ Anti-Knock Improvers (Octane Boosters) | Chemical Additives for Fuels
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Entry Strategies
📌 One: Product Definition & Classification: Do You Really Understand "Anti-Knock Improvers"?
Anti-knock improvers are critical chemical additives used in gasoline and other fuel systems to increase the octane rating, prevent engine knocking, and improve combustion efficiency. In international trade, these products are complex because their classification depends heavily on their chemical composition (organic vs. inorganic/lead-based) and their specific function.
They generally fall into two main categories: 1. Organic Chemical Additives: Such as MTBE (Methyl Tertiary Butyl Ether), ETBE, or complex organic blends. These are often classified under Chapter 29 (Organic Chemicals) or Chapter 38 (Miscellaneous Chemical Products). 2. Lead-Based or Specific Mineral Oil Additives: Historically, tetraethyl lead was common. Now, certain lead compounds or specific mineral-oil-based anti-knock agents fall under Chapter 38 (Prepared Lubricants/Additives).
⚠️ Key Distinction Point:
- If the product is a pure organic compound (like MTBE or ETBE) not specifically prepared as a mixture → It may fall under Chapter 29 (Organic Chemicals).
- If the product is a preparation, mixture, or specifically designed fuel additive (especially if based on mineral oils or specific metal compounds like lead) → It falls under Chapter 38 (Miscellaneous Chemical Products).
- Critical Note: The presence of "Leed" or specific metal compounds often triggers different HS codes with different base tariffs.
📦 Two. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided data analysis, here are the precise HS Codes and the reasoning for each:
| HS Code | Product Description & Summary | Applicable Scenario | Chemical Basis |
|---|---|---|---|
2942.00.35.00 |
Other Organic Compounds: Inferred as organic compounds based on material. | Pure organic chemical intermediates or specific organic additives not elsewhere specified. | Organic Compound (Non-specific) |
2942.00.50.00 |
Other Organic Chemicals: Inferred as organic chemical additives. | Organic additives where the specific chemical identity is less defined but clearly organic. | Organic Additive |
3811.19.00.00 |
Anti-Knock Preparations: Consistent with anti-knock agent use; belongs to chemical additives for mineral oils/liquids. | General prepared anti-knock mixtures (non-lead based) for mineral oil-based fuels. | Mineral Oil Additive / Preparation |
3811.11.50.00 |
Lead-Based Anti-Knock Agents: Consistent with anti-knock use; inferred as lead compounds or other chemical ingredients. | Anti-knock agents specifically containing lead compounds (e.g., historical or specialized industrial uses). | Lead Compound / Specific Ingredient |
3811.11.50.00 |
Alternative Lead-Based Interpretation: Uses match anti-knock function; common sense inference for lead compounds. | Same as above; emphasizes the functional match for lead-based additives. | Lead Compound |
🔍 Important Reminder:
- Chapter 29 Codes (2942...) are used when the substance is a distinct organic chemical entity. These often carry higher base tariffs if not specific additives.
- Chapter 38 Codes (3811...) are used for prepared mixtures or additives specifically designed for fuels (mineral oils).
- Lead-Containing Products (3811.11.50.00) typically have a 0% Base Tariff but still face high additional duties.
- Non-Lead Mineral Oil Additives (3811.19.00.00) carry a standard base tariff.
💰 Three. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Additions)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: From November 10, 2025 (including subsequent imports)
✅ Context: Heavy surtaxes apply due to US-China trade tensions (Section 301 & IEEPA).
🎯 1. 2942.00.35.00 —— Other Organic Compounds
| Item | Content |
|---|---|
| Base Tariff | 6.5% (Ad Valorem) |
| Section 301 Surtax | +25.0% (USITC Footnote 9903.88.01) |
| IEEPA Surtax | +10.0% (China/HK specific, effective Nov 10, 2025) |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Eligibility | ❌ No (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:2942.00.35.00 |
📌 Explanation:
- This code applies to generic organic compounds.
- The 41.5% total rate is extremely high, making this classification costly for importers unless the value is low enough to absorb the cost.
🎯 2. 2942.00.50.00 —— Other Organic Chemicals (Additives)
| Item | Content |
|---|---|
| Base Tariff | 3.7% (Ad Valorem) |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tax Rate | 38.7% |
| Tax Calculation | CIF Value × 38.7% |
| De Minimis Eligibility | ❌ No |
| Legal Basis Path | IEEPA:9903.01.24 → USITC:2942.00.50.00 |
📌 Note:
- Slightly lower base tariff (3.7%) compared to2942.00.35.00(6.5%), resulting in a total of 38.7%.
- Still subject to heavy surtaxes. Suitable for pure organic chemical additives.
🎯 3. 3811.19.00.00 —— Anti-Knock Preparations (Non-Lead/Mineral Oil Based)
| Item | Content |
|---|---|
| Base Tariff | 6.5% (Ad Valorem) |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Eligibility | ❌ No |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3811.19.00.00 |
📌 Explanation:
- This is the most common classification for standard commercial anti-knock additives (like MTBE blends or non-lead organic blends) that are "prepared" for use in fuels.
- High cost warning: The 41.5% rate significantly impacts profit margins.
🎯 4. 3811.11.50.00 —— Lead-Based Anti-Knock Agents
| Item | Content |
|---|---|
| Base Tariff | 0.0% (Ad Valorem) |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tax Rate | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Eligibility | ❌ No |
| Legal Basis Path | IEEPA:9903.01.24 → USITC:3811.11.50.00 |
📌 Note:
- Lowest Total Tariff: Only 35.0% due to the 0% base tariff.
- Caution: Lead-based products are heavily regulated globally due to toxicity. Ensure compliance with EPA and environmental laws.
- Suitable for specific industrial or legacy chemical formulations.
🛠️ Four. Customs Clearance Practical Advice (Real-World Pitfall Avoidance Guide)
✅ 1. Required Documentation Checklist (Missing Items = Delays)
| Document | Must Provide | Explanation |
|---|---|---|
| ✅ Safety Data Sheet (SDS) | ✔️ | Crucial for chemical classification. Must specify if lead-based or organic. |
| ✅ Product Specification | ✔️ | Detailed chemical composition (e.g., % of MTBE, % of Lead Compounds). |
| ✅ Certificate of Analysis (COA) | ✔️ | Confirms purity and specific chemical identity. |
| ✅ Commercial Invoice | ✔️ | Clearly state "Anti-Knock Fuel Additive" and HS Code. |
| ✅ Origin Certificate | ✔️ | To verify CN origin and apply correct surtaxes. |
| ✅ Packaging Photos | ✔️ | Show labeling, hazard symbols (flammable, toxic), and container type. |
✅ 2. Declaration Tips (Key Mantras)
🔥 "Chemical Identity Defines Code, Lead Lowers Base, Organic Raises Base, Total Surtax is High!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Pure Organic Chemical (e.g., MTBE) | 2942.00.50.00 |
Misdeclare as 3811 → Risk of penalty for misclassification |
| Blended Fuel Additive (Non-Lead) | 3811.19.00.00 |
Misdeclare as 2942 → May pay higher base tariff unnecessarily |
| Lead-Based Additive | 3811.11.50.00 |
Omit lead content → Severe penalties for safety/environmental violation |
| Generic "Fuel Treatment" | Specify "Anti-Knock Improver" | Use vague terms → Customs may reclassify and audit |
✅ 3. Special Cases Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Blends | Provide exact formula to Customs Broker. Avoid vague "proprietary" claims. |
| Lead-Based Products | High Risk. Ensure EPA compliance. Even if tariff is low (35%), regulatory hurdles are high. |
| Small Sample Shipments | Still subject to 41.5% or 35% tax. No de minimis exemption for chemicals from China. |
| Mixed Shipments | Declare each HS Code separately. Do not consolidate different chemical types into one line item. |
🌍 Five. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3811.19.00.00 or 3811.11.50.00 |
35.0% - 41.5% | EPA, TSCA | Heavy surtaxes apply. |
| 🇨🇳 China | 2942... or 3811... |
Varies (5-15%) | CCC (if applicable) | No additional US-style surtaxes. |
| 🇪🇺 EU | 3811.10 or 2942... |
0-6.5% | REACH, CLP | Strict chemical registration required. |
| 🇬🇧 UK | 3811.10 |
0-6.5% | UK REACH | Post-Brexit regulations apply. |
| 🇦🇺 Australia | 3811.10 |
5% | AICIS | No major surtaxes. |
📌 Conclusion:
- USA is the most expensive market due to Section 301 + IEEPA surtaxes.
- Lead-based products have the lowest US tariff (35%) but highest regulatory scrutiny.
- Organic/Prepared Additives face the highest total rate (41.5%).
📌 Six. Common Errors & Pitfall Guide (Lessons Learned the Hard Way)
❌ Error 1: Declaring "Anti-Knock Agent" without specifying chemical type
👉 Consequence: Customs may classify under the highest base tariff code or request additional fees for re-classification.
❌ Error 2: Omitting Lead Content in SDS
👉 Consequence: Severe fines, detention, or return shipment due to environmental/hazardous material violations.
❌ Error 3: Assuming "Organic" means "Lower Tax"
👉 Consequence: 2942 codes have higher base tariffs (6.5% vs 0%) than some 3811 codes, leading to higher total duty.
❌ Error 4: Using "Fuel Additive" as a generic term without HS Code specificity
👉 Consequence: Delays at port. CBP may reject the entry for lack of detail.
✅ Correct Approach:
"Anti-Knock Improver, Chemical Name: [Specific Name], CAS No: [Number], Contains: [Lead/Non-Lead], For Use in Gasoline, Model: XYZ, SDS Attached"
🎯 Seven. Conclusion: Professional Declaration Saves Money!
🎯 Remember the Mantra:
🔹 "Lead has zero base, Organic has high base, Surtax is 35% on top! Prepare SDS, Specify CAS, Avoid Penalty Trap!"
🔹 "HS Code is Life, Rate Difference is Key, Declaration is Precise, Profit is Kept!"
📌 Tips:
- If your anti-knock improver is produced in Vietnam, Malaysia, or Thailand, you may qualify for IEEPA exemptions or lower tariffs.
- Lead-based products are environmentally sensitive. Ensure full EPA compliance before shipping to the US.
- Recommendation: Apply for an Advance Ruling (Pre-classification) from US Customs if you are unsure between 2942 and 3811.
📣 Immediate Action:
📞 Contact a licensed Customs Broker + Provide SDS + Apply for Pre-classification
🚀 Let your chemical products clear customs smoothly, efficiently, and cost-effectively!
✨ Professional Clearance Starts with Accurate Classification!
💼 Every cent of cost deserves precise calculation!
Customer Reviews
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) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — 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 — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — 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.