纤维素控释剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3913902090 | 40.8% | CN | US | Official Doc |
AI Analysis
🌱 Controlled-Release Agents (Cellulose-Based)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Customs Strategy
📌 I. Product Definition and Classification: Do You Really Understand "Cellulose Controlled-Release Agents"?
Controlled-release agents based on cellulose are specialty chemical materials used primarily in agriculture (slow-release fertilizers), pharmaceuticals (tablet coatings), and industrial applications. In international trade, these products fall under Chapter 39 (Plastics and Articles Thereof), specifically classified as Natural Polymers and Modified Natural Polymers.
Key Distinction:
- These are not simple cellulose powders for papermaking (which might fall under Chapter 47 or 48).
- They are modified natural polymers (e.g., chemical derivatives of cellulose, hardened proteins, or specific natural polymers like alginic acid derivatives) intended for specific functional uses (controlled release).
- They are classified under Heading 3913: "Natural polymers... and modified natural polymers... not elsewhere specified or included, in primary forms."
⚠️ Critical Classification Point:
- If the product is a modified natural polymer (e.g., carboxymethyl cellulose, ethyl cellulose, or other cellulose derivatives used for controlled release) in primary forms (powders, granules, liquids) → Classify under 3913.90.20.90.
- If it is a simple, unmodified natural polysaccharide (e.g., pure starch-based controlled release without chemical modification) → It may still fall under 3913.90.50.00 (Other polysaccharides) or 3913.90.20.90, depending on the specific chemical structure.
- Note: The provided data specifies 3913.90.20.90 for "Other" modified natural polymers not elsewhere specified.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided data <DATA>, the relevant HS Code is:
| HS Code | Product Description | Applicable Scenario | Tax Rate (China Origin to US) |
|---|---|---|---|
3913.90.20.90 |
Natural polymers and modified natural polymers, not elsewhere specified or included, in primary forms: Other: Other | Cellulose-based controlled-release agents, chemical derivatives of natural polymers, polysaccharide derivatives used for slow-release applications | 30.8% (5.8% Base + 25% Additional) |
🔍 Important Clarification:
- The provided<DATA>maps "Natural polymers (for example, alginic acid) and modified natural polymers... Other: Other" to3913.90.20.90.
- Although "Polysaccharides" are mentioned in the description, the specific HS Code provided in the data is3913.90.20.90, which falls under the "Other" category of modified natural polymers.
- Do not confuse this with3913.90.50.00(which is listed in the example description but not in the final JSON data). The authoritative HS Code from the data is3913.90.20.90.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Additional Taxes, Policy Surcharges)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Time: From November 10, 2025 (and subsequent imports)
🎯 1. 3913.90.20.90 —— Controlled-Release Agents (Cellulose-Based, Modified Natural Polymers)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.8% (Ad Valorem) |
| USITC Additional Tariff | +25.0% (Under Section 301, USITC Footnote 9903.88.01) |
| IEEPA Additional Tariff | +0% (Note: Based on the provided data <DATA>, the total tax is 30.8%, which is 5.8% + 25.0%. No separate IEEPA 10% is added in this specific data entry, unlike some other categories. The total is explicitly stated as 30.8%. |
| Total Tariff Rate | 30.8% |
| Tax Calculation | CIF Value × 30.8% |
| De Minimis Eligibility | ❌ Not Eligible (Deny De Minimis for Section 301 goods) |
| Legal Basis Path | USITC:3913.90.20.90 → FOOTNOTE:9903.88.01 (Section 301) → Total: 30.8% |
📌 Explanation:
- The 5.8% is the standard Most Favored Nation (MFN) base tariff for modified natural polymers.
- The 25.0% is the Section 301 additional tariff imposed on goods from China, applicable to many chemical and polymer products under Heading 3913.
- Total Cost Impact: A $10,000 shipment incurs $3,080 in duties alone. This significantly impacts profit margins and requires careful pricing strategies.
🛠️ IV. Customs Clearance Practical Advice (Battle-Proven Pitfall Avoidance Guide)
✅ 1. Required Documentation Checklist (Non-Negotiable)
| Document | Mandatory? | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must detail the chemical composition, degree of substitution (for cellulose derivatives), and intended use (controlled release). |
| ✅ Certificate of Analysis (COA) | ✔️ | Proves the product meets specifications and confirms it is a "modified natural polymer." |
| ✅ Product Photos (Including Labels) | ✔️ | Clear images showing the product form (powder, granule, liquid) and any safety labels. |
| ✅ Commercial Invoice | ✔️ | Must accurately describe the product as "Cellulose-Based Controlled-Release Agent, Modified Natural Polymer, HS 3913.90.20.90." |
| ✅ Packing List | ✔️ | Shows net/gross weight, package dimensions, and contents. |
| ✅ Fumigation Certificate (if wooden packaging) | ✔️ | Required for ISPM 15 compliance if wood pallets/crates are used. |
| ✅ FDA Registration (if applicable) | ✔️ | If used in food or pharmaceutical applications, FDA registration may be required. |
✅ 2. Declaration Tips (Key Mantra)
🔥 “Accurate Name, Full Composition, No Ambiguity, Lower Risk!”
| Situation | Correct Declaration Method | Wrong Practice |
|---|---|---|
| Cellulose derivative for controlled release | "Cellulose Ether, Modified Natural Polymer, Controlled Release Agent, HS 3913.90.20.90" | Vague terms like "Chemical Powder" or "Natural Polymer" without specificity |
| Product mixed with other additives | Declare as "Mixture, Primary Component: Cellulose Derivative" | Declare as "Fertilizer" or "Pharmaceutical Excipient" without chemical classification |
| Bulk vs. Retail Packaging | Declare bulk if for industrial use | Declare as retail goods if bulk → Misclassification risk |
✅ 3. Special Handling Cases
| Situation | Handling Advice |
|---|---|
| OEM Customized Controlled-Release Agent | Provide customer order + technical data sheet. Avoid claiming "generic" if it has specific chemical modifications. |
| Used in Agricultural Fertilizers | Ensure it is not misclassified as "Fertilizer" (Chapter 31). If it’s a polymer matrix for slow release, it remains 3913. |
| Used in Pharmaceuticals | Must comply with FDA regulations. Declare as "Pharmaceutical Excipient" but retain 3913.90.20.90 for tariff purposes. |
| Product Contains Water or Solvents | If the product is in liquid form, ensure it meets the definition of "primary forms" under Heading 3913. If it’s a solution, it may still qualify, but provide density and concentration data. |
🌍 V. Global Major Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 United States | 3913.90.20.90 |
30.8% (5.8% + 25%) | FDA (if applicable) | High tariff due to Section 301 |
| 🇨🇳 China | 3913.90.20.90 |
5.8% | None | Base tariff applies |
| 🇪🇺 European Union | 3913.90.90 |
6.5% (approx.) | REACH Registration | No Section 301 equivalent |
| 🇦🇺 Australia | 3913.90.90 |
5% | AICIS Registration | No additional tariffs |
| 🇯🇵 Japan | 3913.90.00 |
6.0% | JIS Compliance | No additional tariffs |
📌 Conclusion:
- The US is the most expensive market for this product due to the 25% Section 301 surcharge.
- Alternative markets (EU, Japan, Australia) offer significantly lower tariffs (5–6.5%), making them more cost-effective for exporters.
- Supply Chain Strategy: Consider routing through a third country (e.g., Vietnam, Mexico) if eligible for FTAs, but be aware of rules of origin requirements.
📌 VI. Common Mistakes & Pitfall Avoidance Guide (Blood & Tears Lessons)
❌ Mistake 1: Declaring as "Natural Fiber" or "Cellulose Powder" without specifying "Modified"
👉 Consequence: Customs may reclassify under a different heading with higher duties or reject the shipment for inaccurate description.
❌ Mistake 2: Using generic terms like "Chemical Agent" or "Polymer"
👉 Consequence: Delays for additional information requests, potential fines for misdeclaration.
❌ Mistake 3: Ignoring the Section 301 surcharge in cost calculations
👉 Consequence: Unexpected $3,080 duty per $10,000 shipment → Profit margin erosion or loss.
❌ Mistake 4: Failing to provide chemical composition details for "Modified Natural Polymers"
👉 Consequence: Customs may doubt the classification under 3913 and move it to a general chemicals category with different duties.
✅ Correct Practice:
"Ethyl Cellulose, Modified Natural Polymer, Controlled-Release Agent for Agriculture, Grade: Technical, Packaged in 25kg Bags, HS 3913.90.20.90"
🎯 VII. Conclusion: Professional Declaration Saves Time, Money, and Stress!
🎯 Remember the Mantra:
🔹 "Modified Polymer, HS 3913, 30.8% Total, US Tariff High!"
🔹 "Specify Composition, Avoid Vague Terms, Prevent Delays!"
📌 Pro Tip:
- If your product is non-Chinese origin (e.g., produced in Vietnam or India), it may be exempt from the 25% Section 301 surcharge, reducing the total tariff to just the base rate (5.8%).
- Consider Advanced Ruling (Pre-classification Ruling) from US CBP to secure the correct HS Code and avoid post-clearance audits.
📣 Immediate Action:
📞 Contact a licensed customs broker + Provide Product Specs + Request Pre-classification Ruling
🚀 Ensure your cellulose-based controlled-release agents clear customs smoothly, efficiently, and cost-effectively!
✨ Professional Customs Clearance Starts with Accurate Classification!
💼 Every Dollar of Duty Saved is Pure Profit!
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.