松香酸异戊酯
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🧪 Isopentyl Stearate (Note: Clarification Required) / Isopentyl Abietate
⚠️ CRITICAL CLARIFICATION: The term "Isopentyl Stearate" (松香酸异戊酯) in your prompt contains a chemical contradiction that must be resolved for accurate HS Code classification:
- Stearic Acid (硬脂酸) → Esters are Stearates (硬脂酸酯).
Abietic Acid (松香酸) → Esters are Abietates (松香酸酯).
Isopentyl Stearate = Isoamyl Stearate (Used in cosmetics, flavoring). HS Code: 2916.19.00.00
- Isopentyl Abietate = Isoamyl Abietate (Modified Rosin). HS Code: 3806.90.00.00
Given the Chinese term "松香酸" (Rosin/Abietic Acid), I will assume you mean Isopentyl Abietate (松香酸异戊酯), which is a modified rosin ester. If you truly meant Stearate, see the footnote at the end.
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Strategy
📌 Part 1: Product Definition & Classification – What Exactly Is "Isopentyl Abietate"?
Isopentyl Abietate (also known as Isoamyl Abietate) is a modified rosin product. It is formed by the esterification of Rosin (Abietic Acid) with Isopentyl Alcohol (Isoamyl Alcohol).
It is NOT a basic natural rosin, nor is it a simple fatty acid ester. It falls under the category of "Modified Rosins" or "Rosin Esters."
Key Distinction: * Natural Rosin (Raw): Classified under 3806.91 (Hydrogenated, etc.) or 3806.93 (Sodium/Potassium salts). * Rosin Esters (Modified): Classified under 3806.90. This includes esters with mono-, di-, or polyhydric alcohols.
⚠️ Critical Note:
- If you import "Isopentyl Stearate" (from Stearic Acid), it is a fatty acid ester → HS 2916.
- If you import "Isopentyl Abietate" (from Rosin), it is a rosin ester → HS 3806.
This guide focuses on 3806.90 (Rosin Esters) based on "松香酸" (Rosin Acid).
📦 Part 2: HS Code Classification Details (2026 Latest Tariff Authority)
| HS Code | Product Description | Application | Key Feature |
|---|---|---|---|
3806.90.00.00 |
Rosin esters (including modified rosins) | Adhesives, soaps, printing inks, rubber, paper sizing | Esterified with alcohols (e.g., Isopentyl, Glycerol, Pentaerythritol) |
3806.91.00.00 |
Hydrogenated rosin esters | High-performance adhesives, food packaging | Hydrogenated + Esterified |
3806.93.00.00 |
Sodium or potassium salts of rosin | Soap manufacturing, paper sizing | Salts, not esters |
2916.19.00.00 |
Isopentyl Stearate (If mislabeled) | Cosmetics, flavors, lubricants | Fatty acid ester, NOT rosin |
🔍 重点提醒 (Key Reminder):
- Rosin Esters (松香酸酯) are classified under Chapter 38 (Miscellaneous Chemical Products), specifically 3806.90.
- They are NOT classified under Chapter 29 (Organic Chemicals) unless they are pure, unmodified fatty acid esters (which Rosin is NOT; Rosin is a resin acid).
- Customs often scrutinize "Rosin Esters" because they are used in sensitive industries (adhesives, food packaging). Proper declaration of "Modified Rosin" is critical.
💰 Part 3: 2026 Latest Tariff Rate Breakdown (US-China Trade War Context)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: Post-2025 Tariff Structure (Continuation of Section 301 & IEEPA)
🎯 1. 3806.90.00.00 —— Rosin Esters (Including Isopentyl Abietate)
| Item | Content |
|---|---|
| Base Rate (General) | 5.3% (Ad Valorem) |
| USITC Additional Tariff (Section 301) | +7.5% (List 4B, effective 2025) |
| IEEPA Additional Tariff | +10% (Targeting China-origin chemical intermediates) |
| Total Tariff Rate | 22.8% |
| Tax Calculation | CIF Value × 22.8% |
| De Minimis Eligibility | ❌ No (Not eligible for $800 de minimis exemption) |
| Legal Path | 3806.90.00.00 → USITC: Footnote 9903.88.03 → IEEPA: 9903.01.25 |
📌 Explanation:
- Rosin esters are considered chemical intermediates and industrial materials.
- They are subject to Section 301 tariffs (List 4B) due to their strategic use in adhesives and manufacturing.
- The 10% IEEPA surcharge applies to most China-origin chemical products.
- Total 22.8% is a significant cost driver.
🎯 2. 3806.91.00.00 —— Hydrogenated Rosin Esters (If applicable)
| Item | Content |
|---|---|
| Base Rate | 5.3% |
| USITC Additional | +7.5% |
| IEEPA Additional | +10% |
| Total Rate | 22.8% |
| Note | If the isopentyl abietate is hydrogenated (fully saturated), it falls here. Same tariff. |
🛠️ Part 4: Customs Clearance Practical Advice (Avoid Pitfalls)
✅ 1. Required Documentation Checklist
| Document | Required | Notes |
|---|---|---|
| ✅ Certificate of Analysis (COA) | ✔️ | Must specify Esterification Degree and Abietic Acid Content. |
| ✅ MSDS / SDS | ✔️ | Must classify under UN 3077 (Environmentally Hazardous Substance) or UN 1993 (Flammable Liquid) depending on flash point. |
| ✅ Commercial Invoice | ✔️ | Clearly state "Isopentyl Abietate (Rosin Ester)", NOT just "Chemical". |
| ✅ HS Code Pre-Ruling | ✔️ | Highly recommended for chemical products to avoid misclassification. |
| ✅ TSCA Certification (EPA) | ✔️ | MANDATORY for US import. Confirm compliance with TSCA Inventory. |
| ✅ FCC/CE Reports | ❌ | Not required for industrial chemicals (unless for consumer electronics components). |
✅ 2. Declaration Tips (Key Mnemonic)
🔥 "Rosin Ester, Not Fatty Acid; 3806, Not 2916. TSCA, Yes. MSDS, Yes."
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Isopentyl Abietate | 3806.90.00.00 – Rosin Esters |
Declaring as 2916.19 (Fatty Acid Ester) → Customs Hold & Fine |
| Hydrogenated Version | 3806.91.00.00 – Hydrogenated Rosin Esters |
Declaring as standard rosin ester |
| Mixture with Solvents | 3806.90 (if rosin is principal) |
Declaring as "Solvent Mixture" → Incorrect Classification |
✅ 3. Special Handling Notes
| Situation | Handling Advice |
|---|---|
| TSCA Compliance | Ensure the product is on the TSCA Inventory. If new, submit PMN (Pre-Manufacture Notice) before import. |
| Hazardous Classification | Check Flash Point. If <60°C, it’s a Flammable Liquid (Class 3). Requires HazMat Declaration and special packaging. |
| Country of Origin | Must be clearly marked. China origin triggers 22.8% tariff. Vietnam/Malaysia origin may qualify for lower tariffs under USMCA or FTAs (if eligible). |
| Labeling | Labels must include English Name, Chemical Abstracts Service (CAS) Number (e.g., 538-67-8 for Abietic Acid, but Isopentyl Abietate CAS varies by isomer), and Hazmat Info. |
🌍 Part 5: Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Tariff Rate | Certification | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3806.90.00.00 |
22.8% | TSCA + MSDS | High tariff, strict TSCA |
| 🇨🇳 China | 3806.90.00.00 |
5% | None | Low import duty |
| 🇪🇺 EU | 3806.90.00 |
5.3% | REACH (ECHA) | REACH registration mandatory |
| 🇯🇵 Japan | 3806.90.00 |
5.0% | CSCL | No major additional tariffs |
| 🇻🇳 Vietnam | 3806.90.00 |
0-5% | Depends on Origin | Potential for lower tariffs via VN-US trade |
📌 Conclusion:
- USA imposes the highest barriers (22.8% + TSCA).
- EU requires REACH registration, which can be costly and time-consuming.
- China has low tariffs but strict domestic environmental regulations.
📌 Part 6: Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Classifying as 2916.19 (Fatty Acid Ester)
👉 Consequence: Customs reclassifies to 3806.90, applies 22.8% tariff + penalty for misdeclaration.
❌ Mistake 2: Ignoring TSCA Compliance
👉 Consequence: Shipment seized or destroyed by EPA/Customs. No exceptions.
❌ Mistake 3: Not declaring Hazmat (Flammable)
👉 Consequence: Demurrage charges, fines, and potential safety incidents at port.
❌ Mistake 4: Vague Product Name ("Chemical Resin")
👉 Consequence: Customs hold for further inspection, delaying clearance by weeks.
✅ Correct Declaration Example:
"Isopentyl Abietate, a modified rosin ester, CAS No. [Insert CAS], TSCA Compliant, Flash Point [X]°C, HS Code 3806.90.00.00"
🎯 Part 7: Conclusion – Professional Declaration, Cost Control!
🎯 Remember the Mnemonic:
🔹 "Rosin Ester = 3806, Not 2916. TSCA Yes, Hazmat Yes. Tariff 22.8%, Avoid Misclassification!"
🔹 "HS Code Determines Duty; Chemical Compliance Prevents Seizure."
📌 Pro Tip:
If your product is Hydrogenated, check if it qualifies for HS 3806.91. The tariff rate is the same, but the description must be precise.
Consider pre-landing customs advice or broker consultation for large volumes.
📣 Immediate Action:
📞 Verify CAS Number & TSCA Status with your supplier.
🚀 Engage a Licensed Customs Broker to file ACE Entry for 3806.90.00.00.
💡 Cost Saving: If sourced from Vietnam or Malaysia, explore FTA benefits to reduce tariff exposure.
✨ Professional Customs Clearance Starts with Precise Classification!
💼 Your Chemicals, Your Compliance, Your Cost Control.
📝 Footnote: If You Meant "Isopentyl Stearate" (硬脂酸异戊酯)
If your product is actually Isopentyl Stearate (from Stearic Acid, not Rosin):
- HS Code:
2916.19.00.00(Fatty Acid Esters) - US Tariff (China Origin):
- Base: 6.5%
- Section 301: +7.5%
- IEEPA: +10%
- Total: 24.0%
- Key Difference: Stearates are fatty acid esters (cosmetics/food), while Abietates are rosin esters (industrial/adhesives). Do not confuse them!
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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.