促进剂bs
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3815902000 | 37.8% | CN | US | Official Doc |
| 3815905000 | 40.0% | CN | US | Official Doc |
AI Analysis
🧪 Promoter BS (N-tert-Butyl-2-benzothiazolesulfenamide)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategies
📌 I. Product Definition & Classification: What is Promoter BS?
Promoter BS (Chemical Name: N-tert-Butyl-2-benzothiazolesulfenamide) is a widely used accelerator in the rubber industry. It acts as a "slow-burning" accelerator for sulfur vulcanization, primarily used in natural rubber (NR) and styrene-butadiene rubber (SBR). It is crucial for improving processing safety and curing efficiency.
In international trade, it falls under Chapter 38: Miscellaneous chemical products. Specifically, it is classified as a "Reaction initiator, reaction accelerator, and catalytic preparation."
⚠️ Critical Distinction:
- If the product consists wholly of inorganic substances (e.g., pure mercury or molybdenum compounds), it falls under 3815.90.20.00.
- If the product is an organic accelerator (like Promoter BS, which is organic-based) or a mixture containing organic substances, it falls under 3815.90.50.00.
- Most Promoter BS products are organic accelerators and therefore fall under 3815.90.50.00.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Composition |
|---|---|---|---|
3815.90.20.00 |
Consisting wholly of inorganic substances (Mercury/Molybdenum) | Inorganic catalytic preparations | ✅ Purely Inorganic |
3815.90.50.00 |
Other reaction initiators, accelerators, and catalytic preparations | Organic accelerators (e.g., Promoter BS), mixed formulations | ✅ Organic or Mixed |
🔍 Key Reminder:
- Promoter BS is an organic sulfenamide. Therefore, it cannot be classified under3815.90.20.00(which is for specific inorganic substances like Mercury/Molybdenum).
- It must be classified under3815.90.50.00("Other").
- Misclassification as inorganic could lead to customs audits, delays, or penalties.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Time: November 10, 2025 onwards (including subsequent imports)
🎯 1. 3815.90.50.00 —— Other Reaction Accelerators (Including Promoter BS)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.0% (ad valorem) |
| Section 301 Additional Tariff | +25.0% (USITC Footnote 9903.88.01) |
| Total Tariff Rate | 30.0% |
| Tax Calculation | CIF Value × 30% |
| De Minimis Exemption Eligibility | ❌ No (deny_de_minimis) |
| Legal Basis Path | USITC:3815.90.50.00 → FOOTNOTE:9903.88.01 → Section 301 Tariff |
📌 Explanation:
- The base rate for "other chemical products" under heading 38.15 is 5%.
- However, due to Section 301 tariffs on Chinese goods, an additional 25% is applied.
- Total effective rate is 30%. This is a high tariff category.
- No de minimis exemption applies. Even small shipments are subject to the full 30% tariff.
🎯 2. 3815.90.20.00 —— Inorganic Substances (For Reference Only)
⚠️ Note: This code is NOT applicable for Promoter BS unless it is a pure inorganic mercury/molybdenum compound.
- Base Rate: 0%
- Additional Tariff: 0%
- Total Rate: 0%
- Why it doesn't apply: Promoter BS is organic (C₁₀H₁₃N₃S₂). Customs will reject this classification for organic accelerators.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
✅ 1. Required Documentation Checklist (No Missing Items Allowed)
| Document | Mandatory | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must clearly state chemical name: N-tert-Butyl-2-benzothiazolesulfenamide (Promoter BS) |
| ✅ Safety Data Sheet (SDS) | ✔️ | Required for chemical clearance. Must indicate it is a solid powder/granules. |
| ✅ Commercial Invoice | ✔️ | Must specify "Rubber Accelerator, Organic" |
| ✅ Packing List | ✔️ | Detail net/gross weight, number of packages |
| ✅ Certificate of Origin (CO) | ✔️ | If applicable for non-US origin benefits (though unlikely for CN origin due to tariffs) |
| ✅ FCC/EPA Registration (if applicable) | ✔️ | Check if any regulatory registration is required for chemical imports |
✅ 2. Declaration Tips (Key Mantra)
🔥 "Organic Accelerator, Don't Lie! Classify as 'Other', 30% is the Price!"
| Situation | Correct Declaration | Incorrect Approach |
|---|---|---|
| Promoter BS (Organic) | 3815.90.50.00 |
Misclassify as inorganic 3815.90.20.00 → Audit Risk |
| Mixed Rubber Additives | 3815.90.50.00 |
Split into multiple codes → Complexity & Risk |
| Pure Molybdenum Compound | 3815.90.20.00 |
Use for Promoter BS → Illegal Misdeclaration |
✅ 3. Special Handling Cases
| Situation | Handling Advice |
|---|---|
| OEM Private Label | Provide manufacturer authorization letter. Ensure SDS matches the declared chemical name. |
| Sample Shipment | Even small samples are subject to 30% tariff. No de minimis exemption. |
| Bulk Industrial Import | Pre-clearance consultation with a customs broker is recommended to ensure SDS and HS code alignment. |
| Re-export from China | Tariffs apply at the US port of entry. No reduction for re-export. |
🌍 V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3815.90.50.00 |
30% | SDS, TSCA Compliance | High tariff due to Section 301 |
| 🇨🇳 China | 3815.90.50.00 |
5% | None | No additional surcharges |
| 🇪🇺 EU | 3815.90.90 |
0-6.5% | REACH Registration | REACH registration mandatory for chemical imports |
| 🇦🇺 Australia | 3815.90.90 |
5% | NICNAS/ATO Compliance | Standard AIFZ application may be needed |
| 🇯🇵 Japan | 3815.90.00 |
0-8% | PRTR Act | No specific surcharges |
📌 Conclusion:
- USA has the highest effective tariff (30%) for Promoter BS due to trade tensions.
- EU and Japan require strict chemical regulations (REACH, PRTR) but have lower or zero tariffs.
- China has a modest 5% import tariff, making it competitive for domestic use.
📌 VI. Common Mistakes & Pitfall Guide (Lessons Learned)
❌ Mistake 1: Declaring Promoter BS as "Inorganic Catalyst" (3815.90.20.00)
👉 Consequence: Customs will flag the discrepancy (organic vs. inorganic). Penalties + Delays + Back-tariff + Interest!
❌ Mistake 2: Ignoring the 30% Total Tariff in Cost Calculation
👉 Consequence: Underestimating landed cost. Profit Margin Erosion!
❌ Mistake 3: Missing SDS or Incomplete Chemical Name
👉 Consequence: Customs refusal to clear. Goods Held at Port!
❌ Mistake 4: Assuming De Minimis Exemption for Small Packages
👉 Consequence: Full 30% Tariff Charged even on small samples. Unexpected Costs!
✅ Correct Action:
"Rubber Accelerator, N-tert-Butyl-2-benzothiazolesulfenamide (Promoter BS), Organic, Grade A, 25kg Bags, HS Code: 3815.90.50.00, Origin: China"
🎯 VII. Conclusion: Professional Declaration, Save Time, Reduce Costs!
🎯 Remember the Mantra:
🔹 "Organic Accelerator, Don't Lie! Classify as 'Other', 30% is the Price!"
🔹 "HS Code Determines Destiny, 30% Tariff is Heavy, Declaration Must Be Precise!"
📌 Pro Tip:
- If your Promoter BS is sourced from Vietnam, Thailand, or Malaysia, you may qualify for lower tariffs or preferential rates under FTAs.
- Apply for an Advance Ruling from US Customs (CBP) if importing large volumes to ensure HS code accuracy and avoid post-clearance audits.
📣 Immediate Action:
📞 Contact a Licensed Customs Broker + Provide SDS + Verify HS Code 3815.90.50.00
🚀 Ensure Smooth Clearance, Avoid Penalties, and Protect Your Profit Margins!
✨ Professional Customs Clearance Starts with Accurate Classification!
💼 Every Penny of Cost Deserves Precise Calculation!
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.