Thermal Stabilizer 39
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π₯ Thermal Stabilizer 39 (HS Code 39)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Clearance Strategy
π I. Product Definition and Classification: Do You Really Understand "Thermal Stabilizers (HS 39)"?
"Thermal Stabilizers" in the context of HS Code Chapter 39 refer to Plastic Stabilizers or Additives used in Plastics. Chapter 39 covers "Plastics and Articles Thereof." Therefore, "Thermal Stabilizer 39" specifically denotes chemical additives (primarily heat stabilizers like PVC stabilizers) that are sold in primary forms (powders, liquids, granules) and used as raw materials for the plastics industry, not as finished electronic devices or separate chemical products classified under Chapter 29 or 38.
In international trade, these are typically: 1. PVC Heat Stabilizers: Compounds containing calcium, zinc, barium, or lead (phthalates or non-phthalates) added to PVC resin to prevent degradation during processing. 2. Other Polymer Stabilizers: Additives for PE, PP, ABS, etc., designed to withstand high temperatures during extrusion or molding.
β οΈ Key Distinction:
- If the product is a raw chemical additive (mixture of inorganic/organic compounds for plastic manufacturing) β It falls under Chapter 39 (specifically as a component or additive for plastics) or potentially Chapter 38 (Miscellaneous Chemical Products) depending on composition and primary use. However, the prompt specifies "39", implying classification as a plastic-related material.
- If it is a finished electronic device (e.g., a thermal management unit for electronics) β It would fall under Chapter 85 (Electrical Machinery), NOT Chapter 39.
- Crucial Note: In standard HS nomenclature, "Thermal Stabilizers" are often classified under HS 3824.99 (Miscellaneous chemical products) or HS 3907/3911 (if pre-mixed with resin). However, if the user insists on Chapter 39, it likely refers to pre-stabilized plastic compounds or primary forms of plastic stabilizers integrated into plastic articles.
For this guide, we will assume the product is a Plastic Stabilizer Additive classified under the broader umbrella of plastic-related materials or explicitly as a plastic article/component under Chapter 39 if it takes the form of a pre-compounded masterbatch or stabilized resin.Clarification for HS 39 Context:
Strictly speaking, pure chemical stabilizers are usually HS 3824. However, if they are pre-mixed with plastics (masterbatches) or sold as stabilized plastic resins, they fall under Chapter 39. We will address the most common interpretations under Chapter 39 for "stabilized plastic materials" and clarify the boundary with Chapter 38 to avoid misclassification.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Is it a Raw Chemical? |
|---|---|---|---|
3907.60.00.00 |
Polyacetals (POM) other than copolymers, in primary forms | Often stabilized for industrial use | β Yes (Polymer) |
3908.10.00.00 |
Polyvinyl chloride (PVC) in primary forms | Most common for thermal stabilizers (PVC resins are inherently stabilized) | β Yes (Polymer) |
3915.90.00.00 |
Waste, scrap, and off-cuts of plastics | Recycled stabilized plastics | β No (Reprocessed) |
3926.90.00.00 |
Other articles of plastics and articles of other materials of heading 39.01 to 39.14 | Pre-stabilized plastic components, masterbatches in solid form | β οΈ Mixture |
3824.99.99.99 |
Other prepared binders for foundry molds... other chemical products | Pure Thermal Stabilizer Additives (NOT Chapter 39) | β Raw Chemical |
π Critical Reminder:
- If the product is a powder/liquid additive (e.g., Calcium-Zinc stabilizer) β It is NOT Chapter 39. It is HS 3824.99. Misclassifying it as Chapter 39 is a common error leading to customs penalties.
- If the product is PVC Resin pre-mixed with stabilizers β It is HS 3908.10. This is the most likely "Chapter 39" interpretation.
- If the product is a finished plastic part (e.g., a heat-stabilized housing) β It is HS 3926.90.
- Assumption for this Guide: We will cover HS 3908.10 (Stabilized PVC Resin) and HS 3926.90 (Stabilized Plastic Articles) as the most relevant Chapter 39 codes, while explicitly warning against misclassifying raw additives.
π° III. 2026 Latest Tariff Rate Breakdown (Including Additional Duties, Policy Add-ons)
β Applicable Country: United States (US)
β Country of Origin: China (CN)
β Effective Date: November 10, 2025 onwards (including subsequent imports)
π― 1. 3908.10.00.00 ββ Polyvinyl Chloride (PVC) in Primary Forms (Pre-Stabilized)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% (ad valorem) |
| USITC Additional Duty | +25% (from USITC Footnote 9903.88.01) |
| IEEPA Additional Duty | +10% (for China/HK products, from Nov 10, 2025) |
| Total Rate | 35% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Eligibility | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3908.10.00.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- "PVC Resin" is classified under 3908.10. Even if pre-stabilized, it remains a primary form plastic.
- The 25% USITC duty applies to most plastics from China.
- The 10% IEEPA duty applies to all Chinese-origin goods under this code.
- Total 35% is significant for bulk raw materials.
π― 2. 3926.90.00.00 ββ Other Articles of Plastics (Stabilized Plastic Components)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% (ad valorem) |
| USITC Additional Duty | +25% (from USITC Footnote 9903.88.01) |
| IEEPA Additional Duty | +10% (for China/HK products, from Nov 10, 2025) |
| Total Rate | 35% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Eligibility | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3926.90.00.00 β FOOTNOTE:9903.88.01 |
π Note:
- If the "Thermal Stabilizer" is a finished plastic part (e.g., a heat-resistant casing), it falls here.
- Same high tariff burden as raw PVC resin.
π¨ Alternative: If Misclassified as 3824.99.99.99 (Raw Stabilizer Additive)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% - 5.3% (varies) |
| USITC Additional Duty | +25% |
| IEEPA Additional Duty | +10% |
| Total Rate | 35% - 40.3% |
| Risk | High Risk of Misclassification Penalty if declared as Chapter 39. |
π οΈ IV. Customs Clearance Practical Advice (Combat Pitfall Guide)
β 1. Prepare Required Documents (None Can Be Missing)
| Document | Must Provide | Description |
|---|---|---|
| β Product Specification Sheet | βοΈ | Detail composition (e.g., PVC resin + Ca/Zn stabilizer content %) |
| β MSDS/SDS | βοΈ | Crucial for chemical additives to prove safety and composition |
| β Product Photos (Labeling) | βοΈ | Clear view of HS Code, batch number, and "PVC Resin" or "Stabilizer" designation |
| β Third-Party Test Report | βοΈ | CE, RoHS, REACH, FDA (if food contact) |
| β Commercial Invoice | βοΈ | Must state "PVC Resin, Pre-stabilized" or "Plastic Article, Thermal Stable" |
| β Certificate of Origin (CO) | βοΈ | If non-China origin, to claim preferential rates |
| β Packing List | βοΈ | Specify net/gross weight, volume |
β 2. Declaration Skills (Key Mantra)
π₯ "Form Determines Code, Raw vs. Finished, Chemical vs. Plastic!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| PVC Resin with Stabilizers | 3908.10.00.00 - PVC Resin |
Misdeclare as additive (3824) β Audit risk |
| Pure Stabilizer Powder | 3824.99.99.99 - Chemical Additive |
Misdeclare as Chapter 39 β Penalty! |
| Finished Plastic Housing | 3926.90.00.00 - Plastic Article |
Misdeclare as resin β Weight/Value mismatch |
| Masterbatch (Pellets) | 3916.10.00.00 or 3915.90 |
Misdeclare as raw chemical β Complex valuation |
β 3. Special Circumstances Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Stabilized PVC | Provide customer PO + Formula sheet to prove primary form |
| Mixed Chemicals | If stabilizer content >50%, may still be Chapter 39 if it retains plastic characteristics |
| Food Contact Application | Provide FDA 21 CFR compliance documents |
| RoHS/REACH Compliance | Mandatory for EU/US markets; failure leads to seizure |
π V. Global Major Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification Requirements | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3908.10.00.00 |
35% (CN) | FDA, RoHS | High tariff for plastics |
| π¨π³ China | 3908.10.00.00 |
5% | CCC (if applicable) | No additional duties |
| πͺπΊ EU | 3908.10.00.00 |
0% (if CE) | CE, REACH, RoHS | No additional duties |
| π¦πΊ Australia | 3908.10.00.00 |
5% | RCM | No additional duties |
| π―π΅ Japan | 3908.10.00.00 |
0% | PSE | No additional duties |
π Conclusion:
- USA is the only major market with high additional duties (35%) for Chinese-origin plastics.
- EU/Japan/Australia have minimal tariff barriers, but strict chemical compliance (REACH/RoHS) is required.
π VI. Common Mistakes & Pitfall Guide (Lessons Learned)
β Mistake 1: Declaring pure stabilizer powder as Chapter 39 Plastic
π Consequence: Customs audit, penalty for misclassification, potential 25% - 100% fine.
β Mistake 2: Declaring pre-stabilized PVC as Raw Chemical
π Consequence: Wrong duty rate application, customs holds, delays.
β Mistake 3: Ignoring RoHS/REACH Compliance
π Consequence: Goods seized in EU/US, return at exporterβs cost.
β Mistake 4: Using generic terms like "Plastic Additive" without specifying Primary Form
π Consequence: Customs cannot determine if itβs a raw material or finished good β Delays.
β Correct Practice:
"PVC Resin, Pre-stabilized with Ca/Zn Compounds, PVC Content >90%, Primary Form, Non-RoHS Restricted, Model XYZ, Batch No. 123"
π― VII. Conclusion: Precise Classification Saves Money!
π― Remember the Mantra:
πΉ "If itβs a Powder/Liquid Additive β Chapter 38 (3824). If itβs PVC Resin with Stabilizer β Chapter 39 (3908). If itβs a Finished Part β Chapter 39 (3926)."
πΉ "Chapter 39 for Plastics, Chapter 38 for Chemicals. Donβt mix them!"
π Tips:
- If your thermal stabilizer is a pre-mixed masterbatch (pellets), it may fall under HS 3916 (Monofilament/Similar Forms) or HS 3901-3914 depending on base polymer.
- For USA imports, consider supply chain diversification (e.g., Vietnam, Mexico) to avoid the 35% total tariff.
- Always apply for an Advance Ruling from US CBP if the classification is ambiguous.
π£ Immediate Action:
π Consult with a licensed customs broker + Provide SDS + Apply for HS Code Pre-ruling
π Ensure your Thermal Stabilizers clear customs smoothly, compliantly, and cost-effectively!
β¨ Professional Customs Clearance Starts with Accurate Classification!
πΌ Every Cent of Duty Saved is Pure Profit!
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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.