高品质抗爆剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3811115000 | 35.0% | CN | US | Official Doc |
| 3811190000 | 41.5% | CN | US | Official Doc |
| 2942003500 | 41.5% | CN | US | Official Doc |
| 2942005000 | 38.7% | CN | US | Official Doc |
AI Analysis
⛽ 高品质抗爆剂（High-Quality Anti-Knock Agents / Octane Boosters）
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Customs Strategy
📌 I. Product Definition: What Exactly Is an "Anti-Knock Agent"?
An Anti-Knock Agent (also known as an Octane Booster) is a chemical additive used in internal combustion engines to increase the fuel's octane rating, preventing engine knocking (premature ignition) and ensuring smoother operation.
In international trade, these products are classified based on their chemical composition (organic vs. inorganic/petroleum-based) and functional purpose:
- Petroleum-Based Additives: Chemical additives mixed with mineral oils or similar liquids to improve performance.
- Organic Chemical Compounds: Pure organic substances (e.g., MTBE, ETBE, or complex organic mixtures) that serve as anti-knock agents.
- Lead-Based Compounds: Historically common but now restricted in many jurisdictions; still subject to specific classification if present.
⚠️ Key Distinction Point:
- If the product is a chemical additive for mineral oils (fuel blends) →归入 3811.19.00.00
- If the product is a specific organic chemical compound acting as an anti-knock agent →归入 2942.00.50.00 or 2942.00.35.00
- If it is lead-based or metallic compound-based →归入 3811.11.50.00
📦 二、HS Code Classification Details (2026 Latest Tariff Authority Mapping)
Based on the provided data, here are the four possible HS Code classifications for "High-Quality Anti-Knock Agents," along with the reasoning for each:
| HS Code | Product Description | Reason for Classification | Total Tax Rate |
|---|---|---|---|
3811.19.00.00 |
High-Quality Anti-Knock Agent | Matches the description as a chemical additive for mineral oils. The usage aligns perfectly with Chapter 38 (Miscellaneous Chemical Products), specifically fuel additives. | 41.5% |
3811.11.50.00 |
High-Quality Anti-Knock Agent | Infers presence of metallic or lead compounds. Matches with "other anti-knock agents based on lead compounds." High compatibility in function with traditional leaded additives. | 35.0% |
2942.00.35.00 |
Anti-Knock Performance Improver | Classified based on material inference as an organic chemical additive. Fits under "Other Organic Compounds" in Chapter 29. | 41.5% |
2942.00.50.00 |
Anti-Knock Performance Improver | Also inferred as an organic chemical additive, fitting "Other Organic Compounds." No conflict in form or usage. | 38.7% |
3811.19.00.00 |
Anti-Knock Agent | General classification where the product name matches the usage exactly. Recognized as a liquid additive for fuels. | 41.5% |
🔍 Critical Note:
- Chapter 38 (3811) is generally preferred for fuel additives that are mixtures or proprietary blends designed for direct use in fuels. - Chapter 29 (2942) is used when the product is a specific organic chemical compound rather than a general fuel additive mixture. - The 35.0% rate for3811.11.50.00is lower than the 41.5% for others, but it specifically applies to metal/lead-based compounds, which may face environmental restrictions.
💰 三、2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: From November 10, 2025 (and subsequent imports)
🎯 1. HS Code 3811.19.00.00 – Anti-Knock Agents (Petroleum/Additive Based)
| Item | Detail |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surtax (USITC) | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Exemption Eligible? | ❌ No (deny_de_minimis) |
| Legal Basis Path | Base: 6.5% → Section 301: +25% → Section 122: +10% |
📌 Explanation:
- This is the most common classification for general fuel additives. - The 41.5% rate is high due to the cumulative effect of base tariffs and two layers of US trade policy surtaxes. - No de minimis exemption: Small shipments are not exempt from duties.
🎯 2. HS Code 3811.11.50.00 – Anti-Knock Agents (Metal/Lead-Based)
| Item | Detail |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax (USITC) | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Tax Rate | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption Eligible? | ❌ No |
| Legal Basis Path | Base: 0% → Section 301: +25% → Section 122: +10% |
📌 Note:
- This rate is 6.5% lower than the3811.19classification because the base tariff is 0%. - However, if the product contains lead, it may face additional environmental or health-related restrictions or bans in the US, regardless of the lower tariff. Verify if the product actually contains lead before using this code.
🎯 3. HS Code 2942.00.35.00 – Anti-Knock Agents (Organic Compound)
| Item | Detail |
|---|---|
| Base Tariff | 6.5% |
| Section 301 Surtax (USITC) | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Exemption Eligible? | ❌ No |
| Legal Basis Path | Base: 6.5% → Section 301: +25% → Section 122: +10% |
📌 Explanation:
- Used if the product is classified as a specific organic chemical rather than a general fuel additive. - Tax rate is identical to3811.19.00.00.
🎯 4. HS Code 2942.00.50.00 – Anti-Knock Agents (Organic Compound)
| Item | Detail |
|---|---|
| Base Tariff | 3.7% |
| Section 301 Surtax (USITC) | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Tax Rate | 38.7% |
| Tax Calculation | CIF Value × 38.7% |
| De Minimis Exemption Eligible? | ❌ No |
| Legal Basis Path | Base: 3.7% → Section 301: +25% → Section 122: +10% |
📌 Note:
- This is the lowest total tax rate (38.7%) among the organic compound classifications. - Use this code only if the product strictly fits the definition of "Other Organic Compounds" under this specific subheading.
🛠️ 四、Customs Clearance Practical Advice (Avoiding Pitfalls)
✅ 1. Required Documentation Checklist (Non-Negotiable)
| Document | Required | Purpose |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must detail chemical composition, concentration, and intended use (fuel additive). |
| ✅ Safety Data Sheet (SDS) | ✔️ | Critical for determining if the product is hazardous (flammable, toxic). |
| ✅ Certificate of Analysis (COA) | ✔️ | To prove the chemical composition and confirm it matches the declared HS Code. |
| ✅ Commercial Invoice | ✔️ | Must clearly state "Anti-Knock Agent" or "Octane Booster" and list CIF value. |
| ✅ Packing List | ✔️ | Details net/gross weight, container size, and packaging type. |
| ✅ Originality Certificate | ✔️ | To confirm Chinese origin for surtax application. |
🚨 Warning:
- If the product contains Lead (Pb), ensure it complies with US EPA regulations. Even if the tariff is lower, non-compliance can lead to seizure. - If the product is a mixture, 3811.19.00.00 is usually the safer and more accurate classification for fuel additives.
✅ 2. Declaration Tips (Key Mnemonics)
🔥 “Be Specific on Composition, Avoid Generic Names!”
| Scenario | Correct Declaration | Incorrect Declaration |
|---|---|---|
| Fuel Additive Mixture | Anti-Knock Agent, Chemical Additive for Mineral Oils |
"Fuel Booster" (Too vague) |
| Organic Compound | Organic Anti-Knock Compound, CAS No. XXXXX |
"Chemical Additive" |
| Lead-Based | Lead-Based Anti-Knock Agent |
"High-Quality Anti-Knock Agent" (Misleading) |
⚠️ Consequence of Misclassification:
- If declared as a generic chemical but found to be a fuel additive, you may face penalties and retroactive tax charges. - If declared as lead-based but actually lead-free, you may trigger unnecessary environmental scrutiny.
✅ 3. Special Cases
| Situation | Handling Advice |
|---|---|
| Proprietary Blends | Use HS Code 3811.19.00.00. Declare as "Fuel Additive, Proprietary Blend." |
| Pure Organic Solvents | Use HS Code 2942.00.50.00 if it fits "Other Organic Compounds." |
| Lead-Containing | Use HS Code 3811.11.50.00, but verify EPA compliance. |
| Samples for Testing | Still subject to 41.5% or 35.0% tax. No de minimis exemption. |
🌍 五、Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certifications Required | Remarks |
|---|---|---|---|---|
| 🇺🇸 USA | 3811.19.00.00 |
41.5% | SDS, EPA Compliance | High surtaxes apply. |
| 🇨🇳 China | 3811.19.00.00 |
5-6% | No extra surtaxes | Lower base tariffs. |
| 🇪🇺 EU | 3811.10.00 |
0-6% | REACH Registration | REACH is critical for chemicals. |
| 🇬🇧 UK | 3811.10.00 |
0-6% | UK REACH | Post-Brexit rules apply. |
| 🇯🇵 Japan | 3811.10.00 |
0-6% | JIS Standards | No significant surtaxes. |
📌 Conclusion:
- USA has the highest cost due to Section 301 and Section 122 tariffs. - China, EU, UK, Japan have significantly lower tariff burdens, but REACH (EU) and JIS (Japan) compliance is mandatory.
📌 六、Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Using "Fuel Booster" as the product name without specifying chemical composition.
👉 Consequence: Customs may reject the declaration or assign a higher, unspecified tax rate.
❌ Mistake 2: Assuming "Organic" means a lower tax rate without verifying the exact subheading.
👉 Consequence: 2942.00.35.00 has a 41.5% rate, same as 3811.19.00.00. Only 2942.00.50.00 is slightly lower (38.7%).
❌ Mistake 3: Ignoring Section 122 (10%) surtax.
👉 Consequence: Underestimating costs by 10%, leading to cash flow issues.
❌ Mistake 4: Claiming de minimis exemption for small shipments.
👉 Consequence: Shipments seized or backdated taxes applied. No de minimis exemption for HS Code 3811 or 2942 from China.
✅ Correct Approach:
"Anti-Knock Agent, Chemical Additive for Mineral Oils, For Fuel Use, Containing [Specific Chemical Name], CAS No. [XXXXX-XX-X], Not Lead-Based"
🎯 七、Conclusion: Professional Classification Saves Money!
🎯 Remember the Key Takeaways:
🔹 "3811 is for Fuel Additives; 2942 is for Organic Compounds."
🔹 "Base Tariff + 25% (301) + 10% (122) = Total Rate."
🔹 "Lead-Based = 35.0%, but Watch Out for EPA Bans."
🔹 "No De Minimis Exemption for Chemicals from China."
📌 Pro Tip:
If your anti-knock agent is originally from Vietnam, Thailand, or Malaysia, you may be eligible for IEEPA Surcharge Exemption, reducing the total tax to just the base tariff (6.5% or 3.7%).
Recommendation: Always apply for an Advance Ruling (Pre-classification) with US Customs (CBP) to avoid disputes.
📣 Immediate Action Required:
📞 Consult with a Licensed Customs Broker
📄 Prepare SDS and COA Documents
🚀 Ensure Compliance, Avoid Delays, Maximize Profit!
✨ Professional Clearance Starts with Accurate Classification!
💼 Every Percent of Tariff Matters!
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.