橡胶抗氧化剂 39
CN → USAI Analysis
🧪 Anti-Oxidant 39 for Rubber (N-Isopropyl-N’-phenyl-p-phenylenediamine)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy
📌 I. Product Definition: What is Anti-Oxidant 39?
Anti-Oxidant 39 (IUPAC name: N-isopropyl-N’-phenyl-p-phenylenediamine, commonly abbreviated as IPPD) is a highly efficient rubber anti-aging agent. It is a black crystalline powder or granular material widely used in the rubber industry to protect rubber products from ozone cracking, heat aging, and oxidative degradation.
Key Applications: * Tire Industry: Essential for tread and sidewall compounds to prevent cracking. * Industrial Rubber: Belts, hoses, and seals requiring high heat resistance. * Automotive Parts: Engine mounts and vibration dampeners.
⚠️ Critical Distinction:
IPPD is a chemical intermediate/additive, not a finished rubber product or a plastic. It is classified under Chapter 38 (Miscellaneous Chemical Products), NOT Chapter 39 (Plastics). * ❌ Wrong: 3907 (Polyacetals, other polyethers, etc.) * ✅ Right: 3824 (Prepared binders for foundry molds, chemical products not elsewhere specified).
📦 II. HS Code Classification Details (2026 Latest Tariff Alignment)
| HS Code | Product Description | Applicability | Key Characteristics |
|---|---|---|---|
| 3824.99.92 | Other chemical products and preparations, not elsewhere specified or included (specific to certain regions like China/US sub-headings for industrial chemicals) | Standard Industrial Grade IPPD | Pure anti-oxidant additive for rubber/plastics |
| 3824.99.99 | Other chemical products and preparations, not elsewhere specified or included | General Industrial Chemicals | Broad category for unlisted chemical additives |
| 2921.49.00 | Amines with oxygen function and their salts; derivatives | If classified as pure organic compound | Rarely used for commercial preparations; used for pure chemical analysis |
🔍 重点提醒 (Key Reminder):
- Most commercial Anti-Oxidant 39 is sold as a prepared formulation or bulk industrial chemical. Therefore, HS Code 3824 is the most common and accurate classification globally. - If the product is a pure chemical substance sold for further synthesis, it might fall under 2921 (Amines), but this is risky for standard industrial supplies. - Do NOT classify under 3907 (Plastics) or 3815 (Activated carbon/catalysts). IPPD is an anti-aging additive, not a catalyst or plastic resin.
💰 III. 2026 Latest Tariff Rates & Tax Details (China Export / US Import Scenario)
✅ Origin: China (CN)
✅ Destination: United States (US)
✅ Validity: 2026 Current Rates
🎯 1. HS Code 3824.99.92 / 3824.99.99 —— Rubber Anti-Oxidant Additives
| Item | Details |
|---|---|
| MFN Base Rate (China) | 5.3% (Ad Valorem) |
| Section 301 Tariff (US) | +25% (List 3: Products excluded from early lists, but many industrial chemicals remain) |
| IEEPA / New Surcharges | +10% (Effective Nov 10, 2025, for certain chemical categories from China) |
| Total Effective Tax Rate | ~40.3% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Basis Path | USITC:3824.99.92 → SECTION_301:3824 → IEEPA:9903.01.24 |
📌 Explanation:
- Rubber anti-oxidants like IPPD are considered strategic industrial inputs. They are not exempt from Section 301 tariffs. - The 10% IEEPA surcharge may apply depending on the specific customs ruling of the chemical’s origin and classification. Always verify if the specific HS sub-heading is flagged under recent IEEPA executive orders. - Total Cost Impact: For every $10,000 CIF value, expect ~$4,030 in duties.
🎯 2. Alternative: HS Code 2921.49.00 —— Organic Amines (Pure Chemical)
| Item | Details |
|---|---|
| MFN Base Rate (China) | 6.5% |
| Section 301 Tariff (US) | +25% |
| IEEPA Surcharge | 0% - 10% (Varies by specific sub-heading; some amines are exempt) |
| Total Effective Tax Rate | ~31.5% - 41.5% |
| Risk | High risk of misclassification if sold as a ready-to-use additive. |
📌 Caution:
- Only use 2921 if you can prove the product is a pure chemical substance intended for further chemical synthesis, not direct rubber compounding. - Most customs authorities will classify "Anti-Oxidant 39" sold to rubber factories as 3824 because it is a prepared product for industrial use.
🛠️ IV. Customs Clearance Practical Advice (Avoid Pitfalls)
✅ 1. Required Documentation Checklist
| Document | Mandatory? | Notes |
|---|---|---|
| Product Specification Sheet | ✔️ | Must state: "N-isopropyl-N’-phenyl-p-phenylenediamine", CAS No. 10438-45-2 |
| Safety Data Sheet (SDS) | ✔️ | Critical for chemical imports. Must classify under GHS standards. |
| Certificate of Analysis (COA) | ✔️ | Purity level (typically ≥98%) |
| Commercial Invoice | ✔️ | Must clearly describe: "Rubber Anti-Aging Agent, Chemical Additive, Not a Plastic or Resin" |
| Original Packaging Photos | ✔️ | Show labeling, CAS number, and hazard warnings (if any) |
✅ 2. Declaration Tips
🔥 Key Phrase for Customs:
"Industrial Chemical Additive for Rubber Stabilization. CAS No. 10438-45-2. Not a plastic, not a finished good."
| Scenario | Correct Declaration | Wrong Declaration |
|---|---|---|
| Bulk Powder | 3824.99.92 - "Chemical Preparation" |
3907 - "Resin" |
| Pelletized Form | 3824.99.99 - "Prepared Chemical" |
4016 - "Rubber Product" |
| Mixed with Filler | 3824.99.99 |
2921 (if misidentified as pure amine) |
✅ 3. Special Handling
| Situation | Advice |
|---|---|
| Hazmat Classification | IPPD is generally not classified as hazardous for transport (UN 3082 if environmental hazard, or UN 1993 if flammable liquid analog, but solid IPPD is often non-haz). Check SDS. |
| EPA Registration | If sold as a pesticide or disinfectant, EPA registration is required. For rubber additive, no EPA Pesticide registration needed, but may need TSCA certification. |
| TSCA Compliance | Ensure the exporter is on the EPA TSCA Inventory. If not, it’s prohibited for import into the US. |
🌍 V. Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Duty Rate | Certification | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3824.99.92 |
~40.3% | TSCA Inventory | High duty; ensure TSCA compliance |
| 🇪🇺 EU | 3824.99.99 |
0% | REACH Registration | REACH is mandatory for all chemicals |
| 🇨🇳 China | 3824.99.92 |
0% (Export) | N/A | Duty-free export for most industrial chemicals |
| 🇮🇳 India | 3824.99.90 |
~7.5% | BIS Standards | Check for BIS certification requirements |
📌 Conclusion:
- EU is the most favorable market for tariff-wise (0%), but REACH compliance is a significant hurdle. - USA has high tariffs but streamlined TSCA processes if the chemical is on the inventory. - China exporters enjoy 0% export duty, making it competitive despite US import tariffs.
📌 VI. Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Classifying under 3907 (Plastics) because it’s used with plastics/rubber.
👉 Consequence: Customs seizure for misclassification; potential fraud charges.
👉 Correction: It is an additive, not a polymer. Use 3824.
❌ Mistake 2: Ignoring TSCA requirements for US imports.
👉 Consequence: Cargo held at port; forced destruction or re-export.
👉 Correction: Verify the chemical is on the EPA TSCA Inventory before shipping.
❌ Mistake 3: Failing to provide CAS Number on the invoice.
👉 Consequence: Customs cannot determine the correct HS code; delay in clearance.
👉 Correction: Always include CAS No. 10438-45-2 on all documentation.
✅ Correct Declaration Example:
"Anti-Oxidant 39 (N-isopropyl-N’-phenyl-p-phenylenediamine), CAS No. 10438-45-2, Powder, Industrial Grade, 25kg Drum, HS 3824.99.92"
🎯 VII. Conclusion: Precision in Chemical Classification Saves Costs
🎯 Remember:
🔹 "Additive is not Plastic, CAS Number is Key."
🔹 "3824 for Chemicals, 2921 for Pure Amines, 3907 for Plastics - Don’t Mix Them Up!"
🔹 "TSCA & REACH are Non-Negotiable for Chemical Imports."
📌 Pro Tip:
For US imports, apply for a Binding Ruling from US Customs and Border Protection (CBP) if you are importing large volumes. This provides legal certainty on the HS code and duty rate, protecting you from future audits.
📣 Immediate Action:
📞 Verify TSCA Inventory Status with your supplier.
📄 Ensure SDS is up-to-date and matches the HS code classification.
🚀 Optimize Supply Chain: Consider sourcing from non-China origins (e.g., Korea, Germany) if the 40% US tariff is prohibitive, though EU REACH costs may offset this.
✨ Professional Clearance, Start with Accurate Classification!
💼 Your chemical compliance is your competitive advantage!
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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) — 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.