戊烯
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 2901210000 | 35.0% | CN | US | Official Doc |
| 2901230000 | 35.0% | CN | US | Official Doc |
AI Analysis
⚗️ Pentene (戊烯)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is "Pentene"?
Pentene is a group of alkene hydrocarbons with the chemical formula C₅H₁₀. In international trade, it is primarily classified based on its structural characteristics (acyclic/unsaturated vs. cyclic) and purity level (refined vs. crude/raw).
Acyclic Pentenes (Unsaturated Chain Hydrocarbons):
These are straight or branched chain hydrocarbons. They fall under Heading 2901 ("Acyclic hydrocarbons for further chemical synthesis"). This includes isomers like 1-pentene, 2-pentene, and isopentene.
Crude Pentenes (Cyclic Hydrocarbons):
Often referred to as "crude" or unrefined feedstocks, particularly those containing cyclic structures or mixed compositions. These fall under Heading 2902 ("Cyclic hydrocarbons"). Specific categories include cyclopentadiene or other cyclic olefins.
⚠️ Key Distinction Point:
- If the product is a pure, refined acyclic alkene → Classified under 2901.23.00.00
- If the product is crude, mixed, or cyclic (e.g., cyclopentadiene) → Classified under 2902.19.00.50 / 2902.19.00.10
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Chemical Structure |
|---|---|---|---|
2901.23.00.00 |
Pentene, classified as unsaturated acyclic hydrocarbon; matches unsaturated chain hydrocarbons. | Refined 1-pentene, 2-pentene, isopentene. Used as chemical intermediates. | ✅ Acyclic (Chain) |
2901.21.00.00 |
Pentene belonging to olefin class; conforms to acyclic unsaturated chemical substances. | Similar to above, emphasizing "acyclic" feature. | ✅ Acyclic (Chain) |
2902.19.00.50 |
Crude pentene belongs to cyclic olefin class; conforms to "other cyclic hydrocarbons". | Crude mixtures, industrial-grade cyclic olefins. | ✅ Cyclic |
2902.19.00.10 |
Crude pentene conforms to the "cyclopentadiene material" category. | Specific cyclic feedstock, often raw material for resins. | ✅ Cyclic (Cyclopentadiene) |
🔍 Key Reminder:
- Refined Pentene must go to 2901.xx (Acyclic).
- Crude/Cyclic Pentene must go to 2902.xx (Cyclic).
- Misclassification between 2901 and 2902 can lead to significant duty disparities due to USITC and IEEPA additional tariffs.
💰 III. 2026 Latest Tariff Rate Details (Including Additional Taxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Time: From November 10, 2025 (including subsequent imports)
🎯 1. 2901.23.00.00 & 2901.21.00.00 — Refined Pentene (Acyclic)
| Item | Content |
|---|---|
| Base Tariff Rate | 0.0% (ad valorem) |
| USITC Additional Tax | +25.0% (Section 301 / Additional Duties) |
| Section 122 Tariff | +10.0% (Specific provision for certain hydrocarbons) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Exemption? | ❌ No (High duty burden) |
| Legal Basis Path | USITC:2901.23.00.00 → SECTION_301:25% → SECTION_122:10% |
📌 Explanation:
- "Base 0%": Standard MFN rate for chemical intermediates.
- "Additional 25%": Result of US trade remedy measures (Section 301).
- "Section 122 10%": Specific additional tariff applied to certain industrial chemicals.
- Total 35%: A heavy burden for chemical traders. Must be factored into pricing strategies.
🎯 2. 2902.19.00.50 & 2902.19.00.10 — Crude/Cyclic Pentene
| Item | Content |
|---|---|
| Base Tariff Rate | 0.0% (ad valorem) |
| USITC Additional Tax | +25.0% (Section 301 / Additional Duties) |
| Section 122 Tariff | +10.0% (Specific provision for certain hydrocarbons) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | USITC:2902.19.00.10 → SECTION_301:25% → SECTION_122:10% |
📌 Note:
- Despite being "crude" or cyclic, the tariff structure is identical to refined pentene in this specific dataset.
- Both categories carry a 35% total duty rate for Chinese-origin goods.
- Ensure accurate classification to avoid misdeclaration penalties, even if rates are similar.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance Guide)
✅ 1. Required Documentation Checklist (Non-negotiable)
| Document | Mandatory | Description |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Must specify: Chemical name (e.g., 1-Pentene), Purity %, CAS Number, Isomer composition. |
| ✅ Certificate of Analysis (COA) | ✔️ | Independent lab report confirming structure (Acyclic vs. Cyclic). |
| ✅ MSDS / SDS | ✔️ | Critical for hazardous chemical transport classification (UN Number, Hazard Class). |
| ✅ Commercial Invoice | ✔️ | Must clearly state "Pentene" or "Cyclic Hydrocarbon" – DO NOT use vague terms like "Chemical Fluid". |
| ✅ Packaging List | ✔️ | Detail container type (e.g., ISO Tank, Drum) and net/gross weight. |
| ✅ Proof of Origin | ✔️ | Required for duty calculation and any potential exemptions (if applicable to other regions). |
✅ 2. Declaration Techniques (Key Mnemonics)
🔥 "Acyclic to 2901, Cyclic to 2902. Purity Defines the Code. 35% is the Price."
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Refined 1-Pentene | 2901.23.00.00 |
Misdeclare as crude → Inspection delay |
| Crude Cyclopentadiene | 2902.19.00.10 |
Misdeclare as acyclic → Wrong code, potential penalty |
| Mixed Hydrocarbon Feed | 2902.19.00.50 |
Vague description "Hydrocarbon Mix" → Custom valuation risk |
| General Chemical Name | "Pentene Isomers" | Must specify structure (Chain vs. Ring) |
✅ 3. Special Situations Handling
| Situation | Handling Advice |
|---|---|
| Isomer Mixtures | If it contains both acyclic and cyclic components, consult HS General Rules of Interpretation (GRI). Usually, the dominant component or essential character determines the code. |
| Hazardous Transport | Pentene is flammable (Class 3). Ensure UN packaging is compliant. Customs may require additional safety declarations. |
| Origin Change | If sourced from Vietnam or Malaysia, USITC/IEEPA tariffs may differ. Check country-specific lists! |
| Pre-Ruling | Given the 35% rate, apply for a Binding Tariff Information (BTI) or Pre-Ruling from CBP to avoid surprise duties. |
🌍 V. Global Main Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 2901.23.00.00 / 2902.19.00.xx |
35% | EPA, DOT Hazmat | High additional duties (301 + 122) |
| 🇨🇳 China | 2901.23.00 / 2902.19.00 |
5% - 7% | N/A | No additional punitive tariffs |
| 🇪🇺 EU | 2901.23.00 / 2902.19.00 |
0% - 6.5% | REACH, CLP | Strict chemical registration required |
| 🇯🇵 Japan | 2901.23.00 / 2902.19.00 |
0% - 4.5% | JIS | No major punitive tariffs |
| 🇮🇳 India | 2901.23.00 / 2902.19.00 |
7.5% - 10% | BIS | Standard duties, no US-style add-ons |
📌 Conclusion:
- USA imposes the highest effective duty rate at 35% due to Section 301 and Section 122 add-ons.
- China, EU, Japan, and India have significantly lower base rates.
- Supply Chain Strategy: Consider sourcing pentene from non-China origins (e.g., SE Asia) if targeting the US market to mitigate tariff impact, provided Rules of Origin are met.
📌 VI. Common Errors & Pitfall Guide (Lessons Learned the Hard Way)
❌ Error 1: Declaring "Pentene" without specifying Acyclic vs. Cyclic
👉 Consequence: CBP may reclassify under the highest duty code or demand further testing → Delays & Storage Fees.
❌ Error 2: Ignoring Section 122 Tariff
👉 Consequence: Underpayment of 10% → Back Taxes + Penalties.
❌ Error 3: Vague Invoice Description ("Chemical A")
👉 Consequence: Customs may apply Highest Duty Rate or seize goods for insufficient disclosure.
❌ Error 4: Failing to Provide SDS
👉 Consequence: Shipment held for safety review → Missed Delivery Deadlines.
✅ Correct Practice:
"1-Pentene, Acyclic Hydrocarbon, Purity >95%, CAS No. 109-67-1, UN 1919, Class 3 Flammable Liquid"
🎯 VII. Conclusion: Precision Classification, Cost Control, and Efficient Clearance!
🎯 Remember the Mnemonics:
🔹 "Acyclic = 2901, Cyclic = 2902. 35% is the US Price."
🔹 "Data Sheet is King, SDS is Queen. No Docs = No Clearance."
📌 Pro Tip:
- If your Pentene is sourced from Vietnam, Thailand, or Malaysia, check if it qualifies for USMCA or other FTAs to avoid the 35% US surcharge.
- Apply for a Pre-Ruling from CBP if your product has a complex isomer mix. It provides legal certainty for the 35% duty burden.
📣 Immediate Action:
📞 Engage a Licensed Customs Broker + Provide TDS/COA + Request CBP Pre-Ruling
🚀 Let your Pentene clear customs smoothly, control costs, and maximize margins!
✨ Professional Clearance Starts with Accurate Classification!
💼 Every 1% of duty matters – calculate it precisely!
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) — 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.