Polyester Resin Stabilizer Raw Material
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3824401000 | 41.5% | CN | US | Official Doc |
| 3824992500 | 41.5% | CN | US | Official Doc |
| 3812393000 | 35.0% | CN | US | Official Doc |
| 3909505000 | 41.3% | CN | US | Official Doc |
| 3812396000 | 41.5% | CN | US | Official Doc |
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AI Analysis
π§ͺ Polyester Resin Stabilizer Raw Material (Polyester Resin Curing Agent Raw Material)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Grade Clearance Strategy
π I. Product Definition & Classification: What Exactly Is "Polyester Resin Stabilizer/Curing Agent Raw Material"?
This product is a critical chemical intermediate used in the production of unsaturated polyester resins, primarily for fiberglass-reinforced plastics (FRP), coatings, and composite materials. In international trade, it is categorized based on its chemical function (stabilizer/curing agent) and composition (polyester-based or other chemical additives).
Key Distinction:
- If the product is a polyester resin-based curing agent (often containing promoters or inhibitors), it falls under chemical resin additives.
- If it is a generic chemical stabilizer for polyurethane or other polymers, it may be classified under general chemical products.
β οΈ Critical Classification Point:
- If it contains polyester resins as the main component β HS 3824
- If it is a generic chemical stabilizer without specific polymer association β HS 3812 or 3824.99
- If it is explicitly marketed as a polyurethane stabilizer β HS 3812 or 3909 (depending on formulation)
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Chemical Basis |
|---|---|---|---|
3824.40.10.00 |
Polyester resin curing agent raw material, classified as chemical resin raw materials & chemical industry pre-made additives/components. | FRP manufacturing, composite materials, casting resins. | Polyester-based |
3824.99.25.00 |
Polyester resin curing agent raw material, classified as chemical raw materials, fitting inference of other chemical products. | General chemical processing, non-specific resin applications. | General chemical additive |
3812.39.30.00 |
Polyurethane stabilizer, classified as composite stabilizer containing polyurethane binders, form: chemical auxiliary. | Polyurethane foam production, coatings, adhesives. | PU-bound composite |
3909.50.50.00 |
Polyurethane stabilizer, explicitly containing polyurethane material keywords, fitting polyurethane product classification. | High-end PU applications, specialized polymer stabilization. | Polyurethane-based |
3812.39.60.00 |
Polyurethane stabilizer, classified as antioxidant preparations for rubber/plastics or other composite stabilizers. | Rubber/plastic processing, general polymer stabilization. | Antioxidant/Composite |
π Key Reminder:
- Products labeled as "Polyester Resin Stabilizer" or "Curing Agent" should primarily be evaluated under 3824.40.10.00 or 3824.99.25.00.
- If the product is mistakenly identified as a polyurethane stabilizer, it may be misclassified under 3812 or 3909, leading to incorrect tax calculations.
- Always check the SDS (Safety Data Sheet) and chemical composition to determine the primary polymer type.
π° III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: From November 10, 2025 (including subsequent imports)
π― 1. 3824.40.10.00 ββ Polyester Resin Curing Agent Raw Material
| Item | Content |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| USITC Surtax | +25% (Under USITC Footnote 9903.88.01, Section 301) |
| IEEPA Surtax | +10% (For China/HK products, from Nov 10, 2025) |
| Total Tariff | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3824.40.10.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- The 25% USITC surtax is applied under Section 301 of the Trade Act for Chinese-origin chemical products.
- The 10% IEEPA surtax is an additional tariff under the International Emergency Economic Powers Act targeting Chinese imports.
- Total 41.5% is a high tariff rate, requiring careful cost planning.
π― 2. 3824.99.25.00 ββ Other Chemical Products (Polyester Resin Stabilizer)
| Item | Content |
|---|---|
| Base Tariff | 6.5% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 41.5% |
| Tax Calculation | CIF Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3824.99.25.00 β FOOTNOTE:9903.88.01 |
π Note:
- This code is used for generic chemical stabilizers that do not fit specific resin categories.
- Tariff rate is identical to3824.40.10.00due to the same surtax structure.
π― 3. 3812.39.30.00 ββ Polyurethane Stabilizer (Composite)
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 35.0% |
| Tax Calculation | CIF Γ 35.0% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3812.39.30.00 β FOOTNOTE:9903.88.01 |
π Note:
- Lower base tariff (0%) but still subject to full surtaxes.
- Only applies if the product is explicitly formulated for polyurethane.
π― 4. 3909.50.50.00 ββ Polyurethane Stabilizer (Explicit PU Content)
| Item | Content |
|---|---|
| Base Tariff | 6.3% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 41.3% |
| Tax Calculation | CIF Γ 41.3% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3909.50.50.00 β FOOTNOTE:9903.88.01 |
π Note:
- Similar to3824codes, this code also incurs 41.3% total tax.
- Use only if the product is clearly identified as a polyurethane stabilizer with significant PU content.
π― 5. 3812.39.60.00 ββ Polyurethane Stabilizer (Antioxidant/Composite)
| Item | Content |
|---|---|
| Base Tariff | 6.5% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 41.5% |
| Tax Calculation | CIF Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3812.39.60.00 β FOOTNOTE:9903.88.01 |
π Note:
- Same total rate as3824codes.
- Applicable for antioxidant or general composite stabilizers not specific to polyurethane.
π οΈ IV. Customs Clearance Practical Advice (Avoiding Pitfalls)
β 1. Required Documentation Checklist (Mandatory)
| Document | Required | Description |
|---|---|---|
| β SDS (Safety Data Sheet) | βοΈ | Must specify chemical composition, primary polymer type (polyester vs. PU), and function (stabilizer/curing agent). |
| β Product Specification Sheet | βοΈ | Details molecular structure, application temperature, and compatibility. |
| β Commercial Invoice | βοΈ | Clearly state "Polyester Resin Stabilizer/Curing Agent" or "Polyurethane Stabilizer" to avoid ambiguity. |
| β Packing List | βοΈ | Include net/gross weight, dimensions, and hazard class if applicable. |
| β Certificate of Origin (CO) | βοΈ | If not China-origin, may qualify for reduced tariffs (but note: 301/IEEPA often still apply). |
| β Third-Party Test Report | βοΈ | ISO, REACH, or other chemical safety certifications. |
β 2. Declaration Tips (Key Strategy)
π₯ "Match the Chemical, Match the Code, Avoid Misclassification Penalty!"
| Scenario | Correct Declaration | Wrong Approach |
|---|---|---|
| Polyester-based curing agent | 3824.40.10.00 or 3824.99.25.00 |
Misclassifying as 3812 β Higher risk of audit |
| Explicitly labeled "PU Stabilizer" | 3909.50.50.00 or 3812.39.30.00 |
Labeling as "Polyester Stabilizer" β Clearance delay |
| General chemical stabilizer | 3824.99.25.00 |
Vague description "Chemical Additive" β Rejection |
| Mixed formulation (both PU & Polyester) | Consult HS ruling; typically 3824 if polyester dominant |
Ambiguous classification β Penalties |
β 3. Special Cases Handling
| Scenario | Handling Advice |
|---|---|
| OEM Custom Formulation | Provide client order + chemical formula to prove primary use. |
| Bilingual Labeling (EN/ZH) | Ensure English description matches HS intent (e.g., "Polyester Resin Curing Agent" not just "Stabilizer"). |
| Hazardous Chemicals | If classified as hazardous, additional DOT/IMDG declarations may be required. |
| Small Samples (De Minimis) | β Not eligible for $800 de minimis exemption due to surtaxes. |
π V. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification Requirements | Remarks |
|---|---|---|---|---|
| πΊπΈ USA | 3824.40.10.00 |
41.5% (China-origin) | SDS, TSCA Compliance | High tariff, strict documentation. |
| π¨π³ China | 3824.40.10.00 |
6.5% | CCC (if applicable), GB Standards | No 301/IEEPA surtaxes. |
| πͺπΊ EU | 3824.99.25.00 |
0β6.5% | REACH, CLP Labeling | No 301/IEEPA, but REACH registration needed. |
| π¦πΊ Australia | 3824.40.10.00 |
5% | AICIS Registration | Moderate tariff, no surtaxes. |
| π―π΅ Japan | 3824.40.10.00 |
6.5% | JIS Standards | No additional surtaxes. |
π Conclusion:
- USA imposes the highest effective tariff (41.5%) on Chinese-origin polyester resin stabilizers due to 301/IEEPA surtaxes.
- EU/Asia markets offer significantly lower costs if supply chain can be diversified or if products are sourced from non-China origins.
π VI. Common Errors & Pitfalls (Blood & Tears Lessons)
β Error 1: Misclassifying "Polyester Stabilizer" as "Polyurethane Stabilizer"
π Consequence: Wrong HS code β Potential audit, back taxes, and penalties.
β Error 2: Failing to disclose chemical composition in SDS
π Consequence: Customs delays, additional testing fees, or refusal of entry.
β Error 3: Assuming de minimis exemption applies
π Consequence: Shipments under $800 are not exempt from 301/IEEPA surtaxes for chemical products.
β Error 4: Using vague terms like "Chemical Additive" on invoice
π Consequence: Customs may assign arbitrary HS code β Unpredictable tariff rate.
β Correct Approach:
"Unsaturated Polyester Resin Curing Agent, Chemical Formula: [Specify], Primary Use: FRP Composites, SDS Attached, TSCA Compliant"
π― VII. Conclusion: Precision Classification, Cost Efficiency, Risk Mitigation
π― Key Takeaway:
πΉ "Polyester Stabilizer" β
3824.40.10.00/3824.99.25.00β 41.5% Total Tax (US)
πΉ "PU Stabilizer" β3812/3909β 35β41.5% Total Tax (US)
πΉ "Generic Chemical" β3824.99β 41.5% Total Tax (US)
π Pro Tip:
If your product is originating from Vietnam, Mexico, or Malaysia, you may qualify for IEEPA exemption, reducing the effective tariff to 0β6.5%.
Recommend Advance Ruling from CBP to confirm HS classification and avoid post-import penalties.
π£ Immediate Action:
π Contact a licensed customs broker + Provide SDS + Apply for CBP Advance Ruling
π Ensure smooth clearance, minimize tax burden, and protect your supply chain!
β¨ Professional clearance starts with accurate classification!
πΌ Every cent of tax savings is worth precise documentation!
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.