Rubber Thermal Stabilizer Additive
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3812105000 | 40.0% | CN | US | Official Doc |
| 3812399000 | 40.0% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3901901000 | 35.0% | CN | US | Official Doc |
| 3402901000 | 38.8% | CN | US | Official Doc |
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AI Analysis
π₯ Rubber Thermal Stabilizer Additive
π HS Code & Tariff Guide | 2026 Updated Customs Classification | Expert Compliance Strategy
π One Product, Multiple HS Codes β Know the Difference to Avoid 40%+ Tariffs!
π¦ 1. Product Definition & Classification: What Is a Rubber Thermal Stabilizer Additive?
A Rubber Thermal Stabilizer Additive is a chemical compound used to prevent degradation of rubber materials under high temperature, maintaining mechanical strength, elasticity, and lifespan during processing and service. These additives are critical in:
- Automotive rubber parts (tires, hoses, seals)
- Industrial belts and gaskets
- Construction sealants and waterproofing membranes
- Electrical insulation materials
β οΈ Key Classification Factor:
The material compatibility (rubber vs. polymer vs. chemical intermediate) and primary function (thermal stabilization vs. antioxidant vs. surface activity) determine the correct HS Code.
π 2. HS Code Breakdown (2026 Tariff Authority β U.S. Customs & Border Protection)
| HS Code | Product Description | Matching Material | Function | Total Tax Rate | Tax Detail |
|---|---|---|---|---|---|
3812.10.50.00 |
Rubber thermal stabilizer additive, formulated for rubber materials | Rubber | Chemical additive (thermal stabilization) | 40.0% | Base: 5.0%, Additional Duty (301): 25.0%, Section 122 Tariff: 10.0% |
3812.39.90.00 |
Rubber thermal stabilizer additive, formulated for rubber, also acts as antioxidant & composite stabilizer | Rubber | Antioxidant & stabilizer | 40.0% | Base: 5.0%, Additional Duty (301): 25.0%, Section 122 Tariff: 10.0% |
3901.90.90.00 |
Rubber thermal stabilizer additive, matching ethylene polymer, general-purpose category | Ethylene Polymer | Chemical additive (broad use) | 41.5% | Base: 6.5%, Additional Duty (301): 25.0%, Section 122 Tariff: 10.0% |
3901.90.10.00 |
Rubber thermal stabilizer additive, matching polymer, primary form raw material | Polymer | Raw material additive | 35.0% | Base: 0.0%, Additional Duty (301): 25.0%, Section 122 Tariff: 10.0% |
3402.90.10.00 |
Rubber thermal stabilizer additive, matching chemical additives, surface-active or functional additive | Chemical Additive | Surface activity / functional enhancer | 38.8% | Base: 3.8%, Additional Duty (301): 25.0%, Section 122 Tariff: 10.0% |
π Critical Insight:
- The same product can be classified under 5 different HS Codes, depending on material compatibility and functional description. - Incorrect classification = 40%+ tariff β even if the product is identical!
π° 3. Tariff Breakdown: Understanding the 40%+ Tax Surge
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: November 10, 2025 (including subsequent imports)
π― 1. 3812.10.50.00 β Thermal Stabilizer for Rubber (Primary Use)
| Item | Detail |
|---|---|
| Base Tariff | 5.0% (ad valorem) |
| Additional Duty (Section 301) | +25.0% (from U.S. Trade Act 301) |
| Section 122 Tariff | +10.0% (from U.S. International Emergency Economic Powers Act β IEEPA) |
| Total Effective Tariff | 40.0% |
| Tax Calculation | CIF Value Γ 40.0% |
| De Minimis Threshold | β Not eligible (denied under U.S. de minimis rules) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3812.10.50.00 β FOOTNOTE:9903.88.01 |
π Why This Applies:
- The product is specifically formulated for rubber and functions as a thermal stabilizer. - Not a general-purpose chemical β cannot be claimed under "broad category" codes.
π― 2. 3812.39.90.00 β Multi-Function Stabilizer (Antioxidant + Stabilizer)
| Item | Detail |
|---|---|
| Base Tariff | 5.0% |
| Additional Duty (301) | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tariff | 40.0% |
| Tax Calculation | CIF Γ 40.0% |
| De Minimis | β Not eligible |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3812.39.90.00 β FOOTNOTE:9903.88.01 |
π Why This Applies:
- The additive dual functions as both thermal stabilizer and antioxidant. - This triggers 3812.39.90.00 β a catch-all subheading for non-specified stabilizers in rubber applications.
π― 3. 3901.90.90.00 β General Use for Ethylene Polymer
| Item | Detail |
|---|---|
| Base Tariff | 6.5% |
| Additional Duty (301) | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tariff | 41.5% |
| Tax Calculation | CIF Γ 41.5% |
| De Minimis | β Not eligible |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3901.90.90.00 β FOOTNOTE:9903.88.01 |
π Why This Applies:
- The additive is used in ethylene polymer systems (e.g., EVA, LDPE). - Classified under "other" polymer additives β highest base rate among all options.
π― 4. 3901.90.10.00 β Primary Form Raw Material (Polymer-Based)
| Item | Detail |
|---|---|
| Base Tariff | 0.0% |
| Additional Duty (301) | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tariff | 35.0% |
| Tax Calculation | CIF Γ 35.0% |
| De Minimis | β Not eligible |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3901.90.10.00 β FOOTNOTE:9903.88.01 |
π Why This Applies:
- The additive is in its primary form (e.g., liquid concentrate, powder) and not yet formulated into final product. - Lowest base rate β but still subject to 25% + 10% extra.
π― 5. 3402.90.10.00 β Surface-Active / Functional Additive
| Item | Detail |
|---|---|
| Base Tariff | 3.8% |
| Additional Duty (301) | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tariff | 38.8% |
| Tax Calculation | CIF Γ 38.8% |
| De Minimis | β Not eligible |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3402.90.10.00 β FOOTNOTE:9903.88.01 |
π Why This Applies:
- The additive exhibits surface-active properties (e.g., improves dispersion, reduces viscosity). - Used in functional formulations β not just stabilization.
π οΈ 4. Customs Clearance Best Practices (Pro Tips to Avoid 40%+ Penalties)
β 1. Documentation Checklist (Mandatory)
| Document | Required? | Purpose |
|---|---|---|
| β Product Specification Sheet | βοΈ | Detail formulation, intended use, compatibility |
| β Technical Data Sheet (TDS) | βοΈ | Confirm function: thermal stabilizer vs. antioxidant |
| β Chemical Structure / MSDS | βοΈ | Prove material compatibility |
| β Commercial Invoice | βοΈ | Must include exact product name and HS Code |
| β Certificate of Origin (CO) | βοΈ | Critical for tariff eligibility |
| β Test Reports (e.g., TGA, FTIR) | βοΈ | Prove stability, thermal performance |
| β Packing List | βοΈ | Show bulk vs. packaging type |
β 2.η³ζ₯ζε·§ (η³ζ₯ε£θ―)
π₯ βMaterial First, Function Second, Name Exact, Tax Avoid 40%!β
| Scenario | Correct HS Code | Wrong Code | Risk |
|---|---|---|---|
| Formulated for rubber, thermal stabilizer | 3812.10.50.00 |
3901.90.90.00 |
+1.5% tax + audit risk |
| Dual function (stabilizer + antioxidant) | 3812.39.90.00 |
3812.10.50.00 |
40% vs. 40% β same, but wrong logic |
| Used in ethylene polymer | 3901.90.90.00 |
3812.10.50.00 |
+1.5% tax + classification error |
| Primary form raw material | 3901.90.10.00 |
3402.90.10.00 |
35% vs. 38.8% β save 3.8% |
| Surface-active property | 3402.90.10.00 |
3812.10.50.00 |
+3.8% tax + risk of rejection |
β 3. Special Cases & Mitigation
| Situation | Recommendation |
|---|---|
| OEM Custom Formulation | Provide client specs + lab report to justify function |
| Mixed Use (Rubber + Polymer) | Use most specific match β e.g., 3812.10.50.00 if rubber is primary |
| Export to Non-U.S. Markets | Check EU, Japan, Australia β no 301/122 tariffs |
| Non-Chinese Origin (Vietnam, Mexico) | Apply for IEEPA exemption β 0% tariff possible |
| Need to Reduce Tax Burden | Apply for Advance Ruling (Pre-Decision) to lock in HS Code |
π 5. Global Market Tariff Comparison (2026)
| Country | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3812.10.50.00 |
40.0% | None (but must declare) | High risk β 301 + 122 tariffs |
| π¨π³ China | 3812.10.50.00 |
5% | CCC, RoHS | No extra duties |
| πͺπΊ EU | 3812.10.50.00 |
0% (if CE) | CE, REACH | No 301/122 |
| π¦πΊ Australia | 3812.10.50.00 |
5% | RCM | No extra |
| π―π΅ Japan | 3812.10.50.00 |
0% | PSE | No extra |
π Conclusion:
- Only the U.S. applies 40%+ tariffs on this product. - China-origin goods face the highest burden. - Non-Chinese origin (Vietnam, Mexico) can avoid 301/122 tariffs.
π¨ 6. Common Mistakes & Costly Errors
β Mistake 1: Using 3901.90.90.00 for a rubber-specific additive
π Result: 41.5% tariff instead of 40.0% β extra 1.5% cost
β Mistake 2: Claiming 3812.10.50.00 for a surface-active additive
π Result: Wrong function β rejection or audit
β Mistake 3: Not declaring material compatibility in invoice
π Result: Customs may reclassify β higher tax + delay
β Mistake 4: Using generic name like βRubber Additiveβ
π Result: No functional clarity β incorrect HS Code assigned
β Correct Declaration Example:
βRubber Thermal Stabilizer Additive, Formulated for Natural & Synthetic Rubber, Function: Heat Resistance, Antioxidant, and Longevity Enhancement, CAS: 12345-67-8, In Primary Formβ
π― 7. Final Verdict: Precision Pays Off
π― Remember the Rule:
πΉ "Material First, Function Second, Name Exact, Tax Avoid 40%!"
πΉ One wrong HS Code = 40%+ tariff = $10,000+ in extra cost per container
π Pro Tip:
π Apply for an Advance Ruling (Pre-Clearance) with U.S. CBP before shipment.
β Lock in your HS Code + tariff rate.
β Avoid surprise audits.
β Save thousands in customs risk.
π£ Act Now!
π Contact a U.S. Customs Broker + Submit Product Data + Request HS Code Pre-Ruling
πΌ Turn your rubber additive into a smooth, low-risk export!
β¨ Smart Classification = Lower Tariffs = Higher Profit!
πΌ Your productβs value starts with the right HS Code.
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) 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.