铸造用粘结剂溶液
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3901905501 | 41.5% | CN | US | Official Doc |
| 3903901000 | 41.5% | CN | US | Official Doc |
| 3506990000 | 37.1% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3903905000 | 41.5% | CN | US | Official Doc |
AI Analysis
🧪 Polymer Casting Binders & Solutions (Adhesives for Casting)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy
📌 I. Product Definition & Classification: Do You Really Understand "Casting Binders"?
Polymer casting binders are critical chemical agents used in sand casting, investment casting, and mold making to bond sand grains or ceramic materials together. In international trade, their classification hinges on two main factors: 1. Chemical Composition: Are they based on ethylene polymers, styrene polymers, or other synthetic resins? 2. State of Preparation: Are they raw polymers (primary forms) or pre-formulated chemical products (adhesives)?
⚠️ Key Classification Distinction:
- If the product is a raw polymer resin (e.g., ethylene copolymer, styrene polymer) in primary forms, it falls under Chapter 39.
- If the product is a pre-mixed adhesive or chemical preparation specifically for bonding, it falls under Chapter 35.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided data, here are the specific HS codes, their logic, and applicable tax rates.
| HS Code | Product Summary / Classification Logic | Key Attribute | Total Tax Rate |
|---|---|---|---|
3901.90.55.01 |
Ethylene Copolymer Basis: Classified as polymer casting binder based on "ethylene copolymer" material characteristics. | Ethylene Copolymer | 41.5% |
3903.90.10.00 |
Styrene Polymer Basis: Classified as polymer casting binder based on "styrene polymer" material attributes. | Styrene Polymer | 41.5% |
3506.99.00.00 |
Adhesive Use Basis: Classified based on adhesive function and characteristics of "preparations of chemical products." | Pre-formulated Chemical/Adhesive | 37.1% |
3901.90.90.00 |
Ethylene Polymer Basis: Classified as polymer casting binder based on "ethylene polymer" material and "primary form" logic. | Ethylene Polymer (Primary) | 41.5% |
3903.90.50.00 |
Styrene Polymer ("Other") Basis: Classified based on "styrene polymer" material and inference from the "Other" category. | Styrene Polymer (Other) | 41.5% |
🔍 Important Note:
- Chapter 39 (Polymers) items generally attract a higher base tariff (6.5%) compared to Chapter 35 (Adhesives), which has a lower base tariff (2.1%).
- However, all listed items are subject to the same additional taxes, resulting in similar total rates, with3506.99.00.00being the only one with a lower total tax (37.1%).
💰 III. 2026 Latest Tariff Rate Breakdown (Including Additional Taxes & Policy Surcharges)
✅ Applicable Country: USA (US)
✅ Origin: China (CN)
✅ Effective Time: 2025/2026 (Current Trade Policy)
🎯 1. Common Tax Structure for Chapter 39 Items (3901.90.55.01, 3903.90.10.00, 3901.90.90.00, 3903.90.50.00)
All four Chapter 39 codes share the exact same tax structure:
| Item | Content |
|---|---|
| Base Tariff (MFN) | 6.5% |
| Section 301 Additional Tariff | +25.0% |
| 122-Clause Tariff (IEEPA/Other) | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Eligibility | ❌ NO (High value goods) |
📌 Explanation:
- Base Tariff (6.5%): Standard Most Favored Nation (MFN) rate for plastic materials/adhesives in primary forms.
- Section 301 (25%): Retaliatory tariffs on Chinese goods under US Trade Law Section 301.
- 122-Clause (10%): Additional surcharge often applied to specific chemical categories under current US administrative orders (e.g., related to national security or supply chain concerns).
- Total 41.5%: This is a very high effective rate. Importers must account for this in their cost structure.
🎯 2. Special Case: Chapter 35 Item (3506.99.00.00)
This code offers a lower total tax burden due to a lower base rate:
| Item | Content |
|---|---|
| Base Tariff (MFN) | 2.1% |
| Section 301 Additional Tariff | +25.0% |
| 122-Clause Tariff | +10.0% |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value × 37.1% |
| De Minimis Eligibility | ❌ NO |
📌 Explanation:
- Base Tariff (2.1%): Lower MFN rate for "prepared adhesives" not elsewhere specified.
- Add-on Taxes: Still subject to the same 25% + 10% surcharges.
- Savings: This option saves 4.4% in total taxes compared to the Chapter 39 options.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
✅ 1. Preparation Checklist (Essential Documents)
| Document | Required | Description |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Must specify chemical composition (e.g., % ethylene, % styrene) and state (liquid/solution). |
| ✅ Safety Data Sheet (SDS) | ✔️ | Critical for chemical products; defines hazard class and handling requirements. |
| ✅ Formula/Composition List | ✔️ | Crucial for HS Code Determination. Must detail if it is a "primary polymer" or a "prepared adhesive." |
| ✅ Commercial Invoice | ✔️ | Clearly state "Polymer Casting Binder" and specify chemical basis. |
| ✅ Packing List | ✔️ | Detail net/gross weight, volume, and container type. |
| ✅ Certificate of Origin | ✔️ | If applicable for any preferential treatment (though unlikely for US imports from China due to high tariffs). |
✅ 2. Declaration Strategy (Key Mantra)
🔥 "Chemical Basis Determines Chapter, Preparation Determines Subheading!"
| Scenario | Correct HS Code | Error & Consequence |
|---|---|---|
| Raw Ethylene Copolymer Resin | 3901.90.55.01 or 3901.90.90.00 |
Misclassifying as adhesive (3506...) → Risk of penalty for incorrect declaration. |
| Raw Styrene Polymer Resin | 3903.90.10.00 or 3903.90.50.00 |
Misclassifying as adhesive (3506...) → Risk of penalty. |
| Pre-mixed Adhesive Solution | 3506.99.00.00 |
Misclassifying as raw polymer → Lower tax paid, but incorrect declaration. |
| Unclear Composition | ❌ | Customs will request sample testing → Delays + Storage Fees. |
✅ 3. Special Handling Tips
| Situation | Advice |
|---|---|
| High Tariff Optimization | If the product is a pre-mixed adhesive (not just raw polymer), argue for 3506.99.00.00 to save 4.4% in total tax. Ensure your formula supports this. |
| Chemical Composition Dispute | Customs may test the product. If it contains < 50% polymer by weight but is "prepared," 3506 might be defensible. If it's > 50% raw polymer, 3901/3903 is mandatory. |
| Labeling | Ensure labels clearly state "For Casting Use" and chemical composition to aid customs officers in classification. |
| Insurance | Given the high tax rate (37-41.5%), insure the CIF value plus estimated duties to avoid financial loss if goods are seized. |
🌍 V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Est. Total Tax (China Origin) | Notes |
|---|---|---|---|
| 🇺🇸 USA | 3901.90.55.01 / 3506.99.00.00 |
37.1% – 41.5% | High Section 301 + 122-Clause tariffs apply. |
| 🇨🇳 China | 3901.90.55.01 / 3506.99.00.00 |
0% – 5% | No Section 301. Import tariffs vary by exact code. |
| 🇪🇺 EU | 3901.90 / 3506.99 |
6.5% – 12% | No Section 301. Standard MFN rates apply. |
| 🇬🇧 UK | 3901.90 / 3506.99 |
6.5% – 12% | Post-Brexit tariff structure similar to EU. |
📌 Conclusion:
- The USA market is the most challenging due to the叠加 (stacked) 35% additional tariffs.
- China-origin casting binders face a 37-41% effective tax rate, significantly impacting competitiveness.
- Consider supply chain diversification (e.g., sourcing from Vietnam or Malaysia) to avoid US Section 301 tariffs if possible.
📌 VI. Common Mistakes & Pitfall Guide (Lessons Learned)
❌ Mistake 1: Declaring "Adhesive" generally without specifying chemical basis.
👉 Consequence: Customs may misclassify, leading to audits or penalties. Always specify "Ethylene-based" or "Styrene-based."
❌ Mistake 2: Confusing "Primary Form" (Raw Polymer) with "Prepared Adhesive."
👉 Consequence: If you declare 3506 (lower tax) but customs finds it's raw polymer (3901), you face back taxes + interest + fines.
❌ Mistake 3: Ignoring the "122-Clause" tariff.
👉 Consequence: Unexpected 10% surcharge on every shipment, eroding profit margins.
❌ Mistake 4: Not providing SDS/TDS.
👉 Consequence: Customs hold for chemical verification, causing delivery delays and demurrage charges.
✅ Correct Approach:
"Polymer Casting Binder, Liquid, Based on Ethylene Copolymer, CAS Number [Insert], for Sand Molding, HS Code 3901.90.55.01."
🎯 VII. Conclusion: Precise Classification Saves Money!
🎯 Remember the Mantra:
🔹 "Raw Polymer = Chapter 39 (6.5% Base); Prepared Adhesive = Chapter 35 (2.1% Base)"
🔹 "US Tariff = Base + 25% (301) + 10% (122)"
🔹 "Check Composition First, Declare Accurately Second!"
📌 Pro Tip:
If your casting binder is pre-mixed and sold as a ready-to-use adhesive, fight for 3506.99.00.00 to save 4.4% in total taxes.
If it is a raw resin that the foundry mixes themselves, you must use 3901 or 3903 codes.
📣 Immediate Action:
📞 Consult a Customs Broker + Provide Formula/SDS + Apply for Pre-Ruling if unsure.
🚀 Minimize Duty Burden, Maximize Clearance Speed!
✨ Professional Customs Clearance Starts with Accurate Classification!
💼 Every Dollar Saved in Duties 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.