天然聚合物阻燃剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 381290 | 0.0% | CN | US | Official Doc |
| 350691 | 0.0% | CN | US | Official Doc |
AI Analysis
🛡️ Synthetic Organic Flame Retardants & Natural Polymer Adhesives (Chemical Additives)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy
📌 I. Product Definition & Classification: What Exactly Are "Natural Polymer Flame Retardants"?
In international trade, the term "Natural Polymer Flame Retardant" is a commercial ambiguity that requires strict technical dissection to avoid misclassification. It generally refers to one of two distinct chemical categories:
- Synthetic Organic Flame Retardants: Chemical additives specifically designed to inhibit combustion, even if derived from or modified with natural polymers. These are classified based on their function (fire resistance) rather than their base material.
- Prepared Adhesives based on Natural Polymers: Substances where natural polymers (like starch, casein, or soy protein) are processed with other agents to create bonding agents, which may have incidental fire-retardant properties but are primarily classified as glues/adhesives.
⚠️ Key Distinction Point:
- If the primary purpose is Fire Resistance (adding chemical agents like brominated/phosphorus compounds), regardless of the base, it falls under 3812.
- If the primary purpose is Adhesion/Bonding using natural polymers (e.g., modified starch glue), it falls under 3506.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Primary Function |
|---|---|---|---|
3812.90 |
Synthetic organic flame retardants, other | Chemical additives for fire resistance in plastics, textiles, or construction materials | ✅ Fire Retardant |
3506.91 |
Prepared glues and adhesives based on natural polymers or modified natural polymers | Industrial adhesives, packaging glues, wood adhesives using starch/protein bases | ✅ Adhesive |
🔍 Critical Reminder:
- "Flame Retardant" ≠ "Adhesive": Even if an adhesive is fire-resistant, if it is marketed and used primarily for bonding, it may still be 3506. However, if it is a standalone chemical additive added to a polymer matrix to reduce flammability, it is 3812.90. - Misclassification Risk: Declaring a synthetic flame retardant as an "adhesive" to avoid tariffs is a high-risk compliance error. Conversely, declaring a simple natural glue as a "flame retardant" may trigger unnecessary chemical safety inspections.
💰 III. 2026 Latest Tariff Rate Details (Including Surcharges & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Date: Post-November 2025 Importations
🎯 1. 3812.90 —— Synthetic Organic Flame Retardants, Other
| Item | Content |
|---|---|
| Base Tariff Rate | 0% (General Rate for HTS 3812) |
| USITC Additional Tariff | +25% (Under USITC Footnote 9903.88.01 / Section 301) |
| IEEPA Additional Tariff | +10% (针对中国/香港产品，自2025年11月10日起 / IEEPA:9903.01.25) |
| Total Tax Rate | 35% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Eligibility | ❌ Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3812.90 → FOOTNOTE:9903.88.01 |
📌 Explanation:
- Flame retardants are considered chemical products. Under Section 301, most chemical additives from China are subject to the 25% additional tariff. - The 10% IEEPA surcharge applies to all Chinese-origin goods unless specifically exempted. - Total Duty: 35%. This is a significant cost factor for chemical manufacturers. - No De Minimis: Items under $800 cannot enter duty-free; they are subject to full taxation.
🎯 2. 3506.91 —— Prepared Glues/Adhesives (Natural Polymer Based)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% (General Rate for HTS 3506) |
| USITC Additional Tariff | +25% (Under USITC Footnote 9903.88.01 / Section 301) |
| IEEPA Additional Tariff | +10% (针对中国/香港产品，自2025年11月10日起 / IEEPA:9903.01.25) |
| Total Tax Rate | 35% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Eligibility | ❌ Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3506.91 → FOOTNOTE:9903.88.01 |
📌 Note:
- Despite being "natural," these adhesives are processed and prepared. They fall under the same Section 301 list as many other industrial chemicals. - Total Duty: 35%. - Compliance Note: Ensure the "natural polymer" claim is substantiated with ingredient lists (e.g., >50% starch/protein) to avoid being reclassified into other adhesive categories (like 3506.99) which might have different nuances, though current rates are similar.
🛠️ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
✅ 1. Required Documentation Checklist (Essential)
| Document | Must Provide | Description |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Must clearly state primary function (Flame Retardant vs. Adhesive). |
| ✅ Ingredient List | ✔️ | Percentage composition of natural polymers vs. synthetic flame retardants. |
| ✅ MSDS / SDS | ✔️ | Critical for chemical imports. Must comply with OSHA HazCom standards. |
| ✅ Commercial Invoice | ✔️ | Clearly describe as "Synthetic Organic Flame Retardant" or "Natural Polymer Adhesive". |
| ✅ Certificate of Origin | ✔️ | To determine duty-free eligibility (if any exemptions apply). |
| ✅ Packaging List | ✔️ | Specify net/gross weight and hazard class (if flammable liquid/gas). |
✅ 2. Declaration Tips (Key Mantras)
🔥 "Function First, Composition Second, Name Precise, Tax Minimized!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Chemical additive for fire safety | 3812.90 - "Synthetic Organic Flame Retardant" |
Misdeclare as "Adhesive" → Audit Risk |
| Glue made from soy/starch | 3506.91 - "Prepared Adhesive (Natural Polymer)" |
Misdeclare as "Flame Retardant" → Wrong Code |
| Mixed product (Glue + Flame Retardant) | Primary Function Test | Split shipment → Fraud Alert |
✅ 3. Special Case Handling
| Situation | Handling Advice |
|---|---|
| OEM Chemical Additives | Provide client specification sheets. Avoid generic names like "Fire Stop" without technical details. |
| "Green" / Eco-Friendly Claims | Do not rely on marketing terms like "Non-Toxic" or "Natural" for classification. Use chemical composition. |
| Hazardous Material | If the flame retardant is a flammable liquid, provide UN Number and Packing Group info. |
| Partial Exemptions | Check if the specific chemical is on the 301 Exclusion List. If exempt, duty may drop to 0%. |
🌍 V. Global Main Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3812.90 / 3506.91 |
35% (25% + 10%) | FDA (if food contact), TSCA | High compliance cost |
| 🇨🇳 China | 3812.90 / 3506.91 |
~1-3% | CCC (if applicable) | Low import duty |
| 🇪🇺 EU | 3812.90 / 3506.91 |
0% (if GSP/Agreement) | REACH Registration | REACH is critical for chemicals |
| 🇦🇺 Australia | 3812.90 / 3506.91 |
5% | AICIS Registration | Chemical inventory required |
| 🇯🇵 Japan | 3812.90 / 3506.91 |
0-3% | PRTR Law | Strict reporting for hazardous substances |
📌 Conclusion:
- USA: Highest duty burden due to Section 301 + IEEPA. - EU/Japan: Lower duties but high regulatory barriers (REACH, PRTR) for chemical substances. - Compliance is Key: Misdeclaring "Natural" to avoid chemical regulations can lead to seizure and fines.
📌 VI. Common Errors & Pitfall Guide (Blood & Tears Lessons)
❌ Error 1: Declaring a Synthetic Flame Retardant as a Natural Adhesive to avoid "Chemical" scrutiny.
👉 Consequence: Customs audit → Back taxes + Penalty + Seizure.
❌ Error 2: Ignoring IEEPA 10% surcharge in cost calculation.
👉 Consequence: Profit margin wiped out. Total 35% duty must be built into pricing.
❌ Error 3: Using vague descriptions like "Chemical Additive" without specifying Function.
👉 Consequence: Customs assigns higher duty rate or requests manual classification (delay).
❌ Error 4: Not providing SDS/MSDS.
👉 Consequence: Shipment held at port indefinitely. Chemical imports require SDS.
✅ Correct Practice:
"Synthetic Organic Flame Retardant, Liquid, Brominated, for Use in Polypropylene Plastics, UN 3082, SDS Attached"
OR
"Prepared Adhesive, Based on Modified Starch, Industrial Grade, Non-Hazardous, SDS Attached"
🎯 VII. Conclusion: Precise Classification, Smooth Clearance, Cost Control!
🎯 Remember the Mantra:
🔹 "Function Dictates Code, Composition Dictates Risk, 35% Duty is the New Normal!"
🔹 "Don't Gamble with 'Natural' Claims; Prove Your Chemistry!"
📌 Pro Tip:
If your flame retardant/adhesive is essential for national security or medical use, apply for an Exemption under IEEPA or Section 301.
Recommend Advance Ruling (AMA) from CBP to confirm the correct HS Code before shipping.
📣 Immediate Action:
📞 Consult a Customs Broker + Provide SDS + Apply for Pre-Ruling
🚀 Ensure your chemical compliance is airtight to avoid port delays!
✨ Professional Clearance Starts with Accurate Classification!
💼 Your Cost Structure Depends on Correct HS Codes!
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.