Special Binder for Casting
CN → US| HS编码 | 关税税率 | 原产国 | 目的国 | 文档 |
|---|---|---|---|---|
| 3506990000 | 37.1% | CN | US | 官方文档 |
| 3903905000 | 41.5% | CN | US | 官方文档 |
| 3901909000 | 41.5% | CN | US | 官方文档 |
| 3901905501 | 41.5% | CN | US | 官方文档 |
| 3506915000 | 37.1% | CN | US | 官方文档 |
商品图片
AI分析
🏭 Special Binder for Casting (聚合物铸造粘合剂)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Tariff Analysis | Strategic Classification Strategy
📌 Part I: Product Definition & Classification Logic: What Exactly is a "Special Binder"?
Special Binder for Casting refers to a chemical compound used as a binding agent in foundry processes (metal casting). It binds sand or other mold materials together to form precise molds and cores.
In international trade, the classification hinges on two critical factors: 1. Material Composition: Is it primarily a polymer (chemical raw material) or a prepared adhesive (finished chemical product)? 2. Form & Function: Is it in a primary form (raw polymer) or a formulated mixture (adhesive/glue)?
⚠️ Key Distinction:
- If the product is considered a prepared adhesive/glue based on its function ("Binder" = Adhesive in HS context) → Chapter 35 (3506)
- If the product is considered a Polymer in primary form used as a base material → Chapter 39 (3901/3903)
📦 Part II: HS Code Classification Matrix (2026 Latest Tariff Concordance)
Based on the provided data, here are the five potential HS Codes with their matching logic and tax implications.
| HS Code | Product Description / Logic Match | Tax Rate (Total) | Tax Detail Breakdown |
|---|---|---|---|
3506.99.00.00 |
Binder Focus: "Binder" matches "Adhesive" (Chapter 35). "Polymer" fits the material trait of prepared adhesives. | 37.1% | Base: 2.1% Add-on (301): 25.0% Section 122: 10% |
3903.90.50.00 |
Polymer Focus: "Polymer" matches "Styrene Polymer" (Chapter 39). "Binder" seen as primary/original shape application of polymer. | 41.5% | Base: 6.5% Add-on (301): 25.0% Section 122: 10% |
3901.90.90.00 |
Material Match: "Polymer" keyword aligns with "Ethylene Polymer". Binder viewed as a chemical in primary/initial form. | 41.5% | Base: 6.5% Add-on (301): 25.0% Section 122: 10% |
3901.90.55.01 |
Chemical Form: "Polymer" extracted as material feature, fits "Ethylene Copolymer" (primary form). No material conflict. | 41.5% | Base: 6.5% Add-on (301): 25.0% Section 122: 10% |
3506.91.50.00 |
General Adhesive: "Polymer" matches material req.; "Binder" matches use. Classified under "Other" category logic. | 37.1% | Base: 2.1% Add-on (301): 25.0% Section 122: 10% |
🔍 Critical Analysis:
- Chapter 35 (3506.xx) treats the product as a prepared adhesive. It has a lower base tariff (2.1%) but still incurs high additional tariffs.
- Chapter 39 (3901/3903) treats the product as a polymer material. It has a higher base tariff (6.5%) because it is viewed as a raw chemical rather than a finished adhesive product.
- Total Tax Difference: 4.4% (41.5% vs. 37.1%). While seemingly small, on high-value shipments, this adds significant cost.
💰 Part III: 2026 Latest Tariff Rate Detailed Breakdown (US Import from China)
✅ Applicable Country: USA (US)
✅ Origin: China (CN)
✅ Effective Date: Post-2025 policies applied
🎯 Scenario A: Chapter 35 (Adhesive Classification)
HS Codes: 3506.99.00.00 | 3506.91.50.00
| Item | Detail |
|---|---|
| Base MFN Rate | 2.1% (Ad Valorem) |
| Section 301 Tariff | +25.0% (Specific to Chapter 39/35 chemical imports from China) |
| Section 122 Tariff | +10.0% (New trade measure on specific chemical categories) |
| Total Effective Rate | 37.1% |
| Calculation Basis | CIF Value × 37.1% |
| De Minimis Exemption | ❌ Not Eligible (High tariffs prevent $800 threshold exemption for most commercial shipments) |
| Legal Path | HTSUS:3506 → USITC Footnote → USTR 301 List → Section 122 Rule |
📌 Interpretation:
- The 2.1% base rate is favorable compared to Chapter 39.
- However, the 25% Section 301 tariff is significant and non-negotiable for Chinese origin.
- The 10% Section 122 tariff is an additional layer on top, making the total burden heavy.
🎯 Scenario B: Chapter 39 (Polymer Classification)
HS Codes: 3903.90.50.00 | 3901.90.90.00 | 3901.90.55.01
| Item | Detail |
|---|---|
| Base MFN Rate | 6.5% (Ad Valorem) |
| Section 301 Tariff | +25.0% (Specific to Chapter 39 chemical imports from China) |
| Section 122 Tariff | +10.0% (Same new trade measure) |
| Total Effective Rate | 41.5% |
| Calculation Basis | CIF Value × 41.5% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Path | HTSUS:3901/3903 → USITC Footnote → USTR 301 List → Section 122 Rule |
📌 Interpretation:
- The 6.5% base rate is higher because polymers are treated as industrial raw materials.
- Total Tax is 4.4% higher than Chapter 35.
- If customs officers determine the "Polymer" aspect is dominant (e.g., sold as a raw resin before formulation), this classification applies.
🛠️ Part IV: Customs Clearance Practical Advice (Avoiding Pitfalls)
✅ 1. Documentation Checklist (Must-Have)
| Document | Required | Purpose |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Crucial: Shows chemical composition. Does it list itself as "Adhesive" or "Resin/Polymer"? |
| ✅ Formula/Composition Report | ✔️ | Proves if it is a "prepared adhesive" (mixed chemicals) or "primary polymer" (single substance). |
| ✅ Product Photos | ✔️ | Packaging, labeling, and physical state (powder, liquid, paste). |
| ✅ Commercial Invoice | ✔️ | Must describe as "Casting Binder" OR "Polymer Resin for Casting". Do not use vague terms. |
| ✅ Certificate of Origin (CO) | ✔️ | To confirm Chinese origin and apply correct Section 301/122 rates. |
| ✅ SDS (Safety Data Sheet) | ✔️ | Helps customs understand chemical nature and hazards. |
✅ 2. Classification Strategy (The Golden Rule)
🔥 Rule of Thumb:
"If it is pre-mixed and ready to use as a glue, declare as Adhesive (Ch 35). If it is a raw resin/polymer to be mixed by the user, declare as Polymer (Ch 39)."
| Scenario | Recommended HS Code | Reasoning |
|---|---|---|
| Pre-mixed Casting Glue | 3506.99.00.00 or 3506.91.50.00 |
Ready-to-use adhesive function dominates. Lower base rate (2.1%). |
| Raw Polymer Resin for Casting | 3903.90.50.00 or 3901.90.90.00 |
Raw material state dominates. Higher base rate (6.5%). |
| Unclear/Complex Mixture | Apply for Advance Ruling | Do not guess. Provide full formula to CBP for pre-classification. |
✅ 3. Common Mistakes & Pitfalls
| ❌ Mistake | ✅ Consequence |
|---|---|
| Mislabeling as "Plastic Parts" | Wrong Chapter entirely. High penalty for misclassification. |
| Ignoring Section 122 | Assuming only 301 tariffs apply. New 10% tariff applies to both chapters. |
| Assuming De Minimis Eligibility | Trying to ship via $800 exemption. Failed due to high tariffs and policy restrictions on Chinese chemicals. |
| Vague Description "Binder" | Customs may select the highest duty rate (Chapter 39) due to ambiguity. |
🌍 Part V: Global Market Comparison (2026)
| Market | Recommended HS Code | Est. Total Duty (China Origin) | Key Notes |
|---|---|---|---|
| 🇺🇸 USA | 3506.99.00.00 (Preferred) |
37.1% | Section 122 + 301 tariffs apply. |
| 🇺🇸 USA | 3903.90.50.00 |
41.5% | Higher base rate if classified as polymer. |
| 🇪🇺 EU | 3506.91 / 3903 |
~4-6.5% + VAT | No Section 301. No Section 122. |
| 🇨🇳 China | 3506 / 3903 |
~0-6.5% | Import duty varies by chapter. No 301. |
📌 Conclusion:
- The US market is the most expensive due to layered tariffs (Base + 301 + 122).
- Chapter 35 (Adhesive) is the cost-effective choice for pre-mixed binders (37.1% vs 41.5%).
- Always verify if the product is pre-mixed to justify Chapter 35 classification.
📌 Part VI: Actionable Clearance Tips (Expert Advice)
- Highlight "Pre-Mixed" Nature: In your invoice and TDS, emphasize that the product is a prepared adhesive (mixture of polymer + additives) ready for casting. This supports HS 3506.
- Avoid "Raw Polymer" Language: Do not describe the product as "Unprocessed Polymer" or "Raw Resin" unless it truly is. This triggers HS 3901/3903 and higher taxes.
- Check Section 122 Applicability: Confirm with your broker that Section 122 tariffs are applied to your specific subheading. This is a new and volatile area.
- Consider Origin Diversification: If possible, source from non-China origins (e.g., Vietnam, India) to avoid Section 301 (25%) and potentially Section 122 tariffs. This could reduce duty to Base Rate Only (2.1% or 6.5%).
🎯 Final Conclusion: Precision Saves Money!
🎯 Key Takeaway:
For Special Binder for Casting, classify as
3506.99.00.00if it is a prepared adhesive.
Total Duty: 37.1%.
Avoid Chapter 39 (3901/3903) which costs 41.5% unless it is a raw polymer.🚀 Pro Tip:
- Document the "Adhesive" function clearly.
- Verify Section 122 status with your customs broker.
- Consider non-Chinese origins for long-term cost savings.
✨ Professional clearance starts with precise classification!
💼 Don't let a 4.4% tax difference erase your profit margin!
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关于 HS 编码归类
协调制度（HS）是由世界海关组织（WCO）制定的国际贸易商品分类标准。全球 200 多个国家采用 HS 系统作为海关关税、贸易统计和进出口监管的基础。
每个 HS 编码遵循以下层级结构：
- 章（2 位）——商品大类（例如：第 84 章：机器和机械设备）
- 品目（4 位）——章内的更具体分类
- 子目（6 位）——国际通用细分，所有 WCO 成员国统一使用
- 本国细分（8-10 位）——各国自行扩展的细分编码，如美国 HTSUS 10 位编码
正确的 HS 编码归类对于顺利通关、准确缴纳关税和遵守贸易法规至关重要。错误归类可能导致海关延误、多缴关税或罚款。
从CN进口到US时，适用的关税税率可能包括：
- 最惠国（MFN）税率——适用于 WTO 成员国的标准关税税率
- 普通税率——适用于无贸易协定国家
- 贸易救济关税——附加关税，如 301 条款（反倾销）、232 条款（国家安全）或反补贴税
本页内容仅供参考。如需正式归类，请咨询当地海关或持牌报关代理。