Special Polymer Resin
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3910000000 | 38.0% | CN | US | Official Doc |
| 3907995050 | 41.5% | CN | US | Official Doc |
| 3907290000 | 41.5% | CN | US | Official Doc |
| 3911909110 | 41.5% | CN | US | Official Doc |
| 3911909150 | 41.5% | CN | US | Official Doc |
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π§ͺ Special Polymer Resin (Special Polymer Materials)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: What Are "Special Polymer Resins"?
Special Polymer Resins refer to primary shape polymeric materials with unique chemical structures or properties, often falling under silicones, polyesters, polyethers, or specific resins. In international trade, precise classification is critical because these materials are subject to high additional tariffs (Section 301, Section 122, IEEPA) if misdeclared or imported from China.
β οΈ Key Distinction Points:
- Silicone/Polysiloxane: If the polymer backbone contains silicon-oxygen bonds β Classify under 3910.
- Polyester/Polyether/Resin: If the polymer is carbon-based (e.g., PET, PBT, PEG) β Classify under 3907 or 3911.
- "Primary Shape" Requirement: Must be in primary forms (granules, pellets, powder, liquid) for further manufacturing. If pre-formed into parts, it may fall under different chapters.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Key Chemical Structure |
|---|---|---|---|
3910.00.00.00 |
Silicones in primary forms | Silicone fluids, sealants, resins, rubbers | Si-O backbone |
3907.99.50.50 |
Other polymers (Polyester type) | PET, PBT, or other complex polyesters | Ester linkages |
3907.29.00.00 |
Other polyethers | PEG, PPG, or other polyether polymers | Ether linkages |
3911.90.91.10 |
Specific chemical nature polymers (e.g., Resins) | Specialty resins not elsewhere specified | Complex organic structures |
3911.90.91.50 |
Resins and other primary products | General specialty resins, modified polymers | Various organic backbones |
π Key Reminder:
- Silicones (3910) have a lower total tariff rate (38.0%) compared to other special polymers (41.5%).
- Non-Silicone Polymers (3907,3911) are subject to higher base duties (6.5%) plus the same additional tariffs.
- "Special Polymer" is a broad term; customs requires specific chemical identification to assign the correct subheading.
π° III. 2026 Latest Tariff Rate Breakdown (Including Additional Duties)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: Current trade policy (Section 301 & IEEPA)
π― 1. 3910.00.00.00 ββ Silicones in Primary Forms
| Item | Content |
|---|---|
| Base Duty Rate | 3.0% (Ad Valorem) |
| Additional Duty (Section 301) | +25% |
| Section 122 Duty | +10% |
| Total Tax Rate | 38.0% |
| Tax Calculation | CIF Value Γ 38.0% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | HTSUS:3910.00.00.00 β USITC:Section 301 β IEEPA:Section 122 |
π Explanation:
- Base Duty (3.0%): Standard MFN rate for silicones.
- Section 301 (25%): USITC tariff on Chinese-origin silicones.
- Section 122 (10%): Additional duty for certain Chinese goods under IEEPA.
- Total: 38.0% is the highest applicable rate for silicone polymers.
π― 2. 3907.99.50.50 ββ Other Polymers (Polyester Type)
| Item | Content |
|---|---|
| Base Duty Rate | 6.5% |
| Additional Duty (Section 301) | +25% |
| Section 122 Duty | +10% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | HTSUS:3907.99.50.50 β USITC:Section 301 β IEEPA:Section 122 |
π Note:
- Polyester-based special polymers face a higher base duty (6.5%) than silicones.
- Same additional tariffs apply, resulting in a 41.5% total rate.
- Commonly used in engineering plastics, fibers, and films.
π― 3. 3907.29.00.00 ββ Other Polyether Polymers
| Item | Content |
|---|---|
| Base Duty Rate | 6.5% |
| Additional Duty (Section 301) | +25% |
| Section 122 Duty | +10% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | HTSUS:3907.29.00.00 β USITC:Section 301 β IEEPA:Section 122 |
π Note:
- Polyethers (e.g., PEG, PPG) are classified here if not elsewhere specified.
- Same high tariff burden as polyesters.
- Often used in surfactants, lubricants, and polyurethane precursors.
π― 4. 3911.90.91.10 & 3911.90.91.50 ββ Specific Chemical Nature Polymers / Resins
| Item | Content |
|---|---|
| Base Duty Rate | 6.5% |
| Additional Duty (Section 301) | +25% |
| Section 122 Duty | +10% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | HTSUS:3911.90.91.10/50 β USITC:Section 301 β IEEPA:Section 122 |
π Note:
- These HS codes cover "other" special polymers/resins not listed in 3901-3907.
- Includes specialty resins for adhesives, coatings, and electronic materials.
- Requires detailed chemical documentation to prove "special" nature.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
β 1. Required Documentation Checklist (Essential)
| Document | Must Provide | Purpose |
|---|---|---|
| β Certificate of Analysis (COA) | βοΈ | Proves chemical composition (silicone vs. polyester vs. polyether) |
| β Material Safety Data Sheet (MSDS) | βοΈ | Confirms physical form and hazards |
| β Product Specification Sheet | βοΈ | Details molecular weight, viscosity, and intended use |
| β Commercial Invoice | βοΈ | Must clearly state "Special Polymer Resin" and HS Code |
| β Bill of Lading | βοΈ | Consistent with invoice description |
| β Origin Certificate (if applicable) | βοΈ | To claim preferential rates (if not from China) |
β 2. Declaration Tips (Critical Mnemonic)
π₯ "Silicones Low, Others High; Base Duty Matters!"
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Silicone Resin/Polymer | 3910.00.00.00 (38.0%) |
Misclassified as 3907 (41.5%) β Extra 3.5% cost |
| Polyester Granules | 3907.99.50.50 (41.5%) |
Misclassified as 3910 β Audit Risk & Penalties |
| Polyether Liquid | 3907.29.00.00 (41.5%) |
Misclassified as "General Plastic" β Underpayment |
| Specialty Resin (Unclear) | 3911.90.91.10 (41.5%) |
Generic "Plastic Resin" β Customs Delay |
π Strategy:
- If your product is silicone-based, ensure it is classified under 3910 to save 3.5% in total taxes.
- For non-silicone polymers, prepare detailed chemical analysis to justify the specific subheading.
- Never declare "Special Polymer" without a precise HS Code; customs will assign a default code with higher scrutiny.
β 3. Special Cases Handling
| Scenario | Handling Advice |
|---|---|
| Mixed Shipments | Separate silicone from polyester/polyether in customs declaration to avoid confusion |
| Pre-Formed Parts | If already shaped, do not use these HS codes; check Chapter 39 or 85 |
| OEM/Contract Manufacturing | Provide customer PO + material specs to prove "primary shape" status |
| Origin Non-China | If from Vietnam, India, etc., verify if Section 301/122 still applies (often no) |
π V. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| πΊπΈ United States | 3910.00.00.00 (Silicone)3907/3911 (Others) |
38.0% (Silicone) 41.5% (Others) |
FDA (if food contact) RoHS (if electronic) |
Highest tariffs globally due to Section 301 & 122 |
| π¨π³ China (Import) | 3910.00.00.00 |
~3-6% | CCC (if applicable) | No additional tariffs |
| πͺπΊ European Union | 3910.00.00 / 3907 |
0-4% (if under duty-free) | REACH Compliance | No Section 301; strict chemical registration |
| π¬π§ United Kingdom | 3910.00.00 |
0-4% | UKCA Marking | Post-Brexit rules apply; similar to EU |
| π―π΅ Japan | 3910.00.00 |
3-5% | JIS Standards | Moderate tariffs; stable trade policy |
π Conclusion:
- USA is the most expensive market for special polymer resins due to 38-41.5% total tariffs.
- Silicones (3910) are slightly cheaper than other polymers (3907/3911).
- For non-US markets, focus on REACH (EU) and chemical safety compliance.
π VI. Common Mistakes & Pitfall Guide (Lessons Learned)
β Mistake 1: Declaring all polymers as 3907 regardless of chemical structure
π Consequence: If actually silicone, you overpay 3.5%. If actually 3911, you risk classification error audits.
β Mistake 2: Using generic terms like "Plastic Pellets" on the invoice
π Consequence: Customs will detain for clarification, causing delay fees and storage costs.
β Mistake 3: Ignoring Section 122 and Section 301 applicability
π Consequence: Underpayment of duties β Penalties + Back Taxes + Interest.
β Mistake 4: Not providing COA/MSDS for "Special" polymers
π Consequence: Customs may reclassify to a higher-duty "catch-all" category.
β Correct Practice:
"Silicone Resin, Primary Shape, CAS No. 63148-62-9, for Adhesive Application, Model XYZ"
vs.
"Polyester Polymer Granules, CAS No. 25038-59-9, Engineering Plastic, Model ABC"
π― VII. Conclusion: Precision in Classification Saves Money!
π― Remember the Mnemonic:
πΉ "Silicone 38, Others 41; Base Duty is 3 or 6, Add 35 More!"
πΉ "HS Code Determines Tax; Misclassification Means Penalty!"
π Pro Tip:
If your special polymer resin is not from China (e.g., from South Korea, Germany, USA), Section 301 and 122 duties do NOT apply. Verify origin carefully to avoid unnecessary high tariffs.
Always apply for Pre-Ruling (Advance Classification) from CBP if the chemical structure is complex.
π£ Immediate Action:
π Contact your customs broker + Provide COA/MSDS + Confirm Origin
π Ensure your special polymer resins clear customs smoothly, efficiently, and cost-effectively!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every percentage point of tariff difference impacts your bottom line!
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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.