Rubber Additive ZMBT Powder
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3824405000 | 40.0% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
| 3824405000 | 40.0% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
| 3824405000 | 40.0% | CN | US | Official Doc |
AI Analysis
🛡️ Rubber Additive ZMBT Powder (Zinc 2-Mercaptobenzothiazole)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Strategy
📌 I. Product Definition & Classification: Do You Really Know “ZMBT”?
ZMBT (Zinc 2-Mercaptobenzothiazole) is a widely used rubber accelerator and activator in the vulcanization process. It plays a critical role in accelerating the curing time of natural and synthetic rubbers, improving tensile strength, and enhancing abrasion resistance. In international trade, it is classified not as a finished rubber product, but as a chemical intermediate/additive used in rubber manufacturing.
Key Distinction:
- ZMBT vs. MBT: ZMBT is the zinc salt of Mercaptobenzothiazole (MBT). While MBT is also a rubber accelerator, ZMBT is more soluble and acts as both an accelerator and a protective colloid.
- Powder Form: The commercial form is typically a fine grayish-white or pale yellow powder.
⚠️ Critical Classification Point:
- If it is pure ZMBT used as a rubber additive → Classify under Chapter 39 (Plastics) or Chapter 40 (Rubber)? No. It is a Chemical.
- Primary HS Heading: 3824 (Prepared binders for foundry molds/cores; chemical products and preparations of the chemical or allied industries, not elsewhere specified or included).
- Specifically: 3824.99 (Other chemical products and preparations).
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Match)
| HS Code | Product Description | Application Scenario | Chemical Nature |
|---|---|---|---|
3824.99.92.00 |
Other chemical products and preparations, incl. ZMBT | Rubber accelerators, vulcanization aids, industrial chemical additives | ✅ Organic Sulfur Compound |
3824.99.99.00 |
Other prepared binders and chemical products, n.e.s. | Non-specific chemical preparations, including mixed rubber additives | ✅ Mixed/Prepared |
2930.90.60.00 |
Other organic sulfur compounds | If classified strictly as an organic sulfur compound (rare for commercial ZMBT powder which is often mixed) | ✅ Pure Organic Sulfur |
4004.00.00.00 |
Rubbder waste and scrap | ❌ Incorrect - ZMBT is a chemical, not rubber scrap | ❌ N/A |
🔍 Key Reminder:
- ZMBT is NOT Rubber (Chapter 40). It is a Chemical Additive.
- Most customs authorities classify ZMBT under 3824.99.92.00 (Other chemical products) because it is a "preparation" or "specialized chemical" not more specifically listed in Chapter 29 (Organic Chemicals).
- If the product is 100% pure ZMBT with no fillers, some jurisdictions may allow 2930.90.60.00, but 3824.99.92.00 is the safer, more common classification for industrial-grade rubber accelerators.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Date: November 10, 2025 (and subsequent imports)
🎯 1. 3824.99.92.00 —— Other Chemical Products (ZMBT Rubber Accelerator)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.3% (ad valorem) |
| USITC Additional Tariff (Section 301) | +25% (Footnote 9903.88.03) |
| IEEPA Additional Tariff (China-Specific) | +10% (Effective Nov 10, 2025) |
| Total Tariff Rate | 40.3% |
| Tariff Calculation | CIF Value × 40.3% |
| De Minimis Eligibility | ❌ Not Eligible (Deny De Minimis for Section 301 goods) |
| Legal Authority Path | IEEPA:9903.01.25 → USITC:3824.99.92.00 → FOOTNOTE:9903.88.03 |
📌 Explanation:
- The 5.3% is the standard Most Favored Nation (MFN) rate for "Other chemical products."
- The 25% is the Section 301 tariff on specific Chinese chemical products.
- The 10% is the new IEEPA tariff on Chinese goods, applicable from November 2025.
- Total: 40.3%. This is a high-cost item. Proper classification is crucial to avoid misclassification penalties.
🎯 2. 2930.90.60.00 —— Other Organic Sulfur Compounds (If Pure ZMBT)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.7% (ad valorem) |
| USITC Additional Tariff (Section 301) | +25% |
| IEEPA Additional Tariff | +10% |
| Total Tariff Rate | 40.7% |
| De Minimis Eligibility | ❌ Not Eligible |
📌 Note:
- If customs accepts the pure organic sulfur compound classification, the base rate is slightly higher (5.7% vs 5.3%), but the surtaxes remain the same.
- Risk: Misclassifying a prepared additive as a pure chemical may trigger audits.
🛠️ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
✅ 1. Required Documentation Checklist (All or Nothing)
| Document | Required | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must state: Chemical Name (ZMBT), CAS Number (120-95-0), Purity (e.g., ≥98%), Usage (Rubber Accelerator). |
| ✅ Safety Data Sheet (SDS) | ✔️ | OSHA-compliant SDS, Section 15: Regulatory Information. |
| ✅ Commercial Invoice | ✔️ | Clearly state “Rubber Accelerator ZMBT Powder” — NOT “Chemical General” or “Rubber Part.” |
| ✅ Certificate of Analysis (COA) | ✔️ | Prove purity and composition. |
| ✅ Bill of Lading (B/L) | ✔️ | Ensure description matches invoice. |
| ✅ Export License | ✔️ | Check if China export controls apply (ZMBT is generally not restricted, but verify). |
✅ 2. Declaration Tips (Key Mantra)
🔥 “Name Precisely, CAS Included, No ‘Rubber’ in Name, Avoid 301 Traps!”
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Pure ZMBT Powder | “ZMBT (Zinc 2-Mercaptobenzothiazole) Rubber Accelerator, CAS 120-95-0” | “Rubber Chemical” or “Vulcanizing Agent” |
| Mixed Additive | “Prepared Rubber Accelerator Mixture (Contains ZMBT)” | “Organic Sulfur Compound” (if mixed) |
| Bulk Shipment | Declare by weight (kg) with clear unit price | Declare by package without weight details |
✅ 3. Special Case Handling
| Situation | Handling Advice |
|---|---|
| Mixed with Silica/Carbon Black | If ZMBT is mixed with other fillers, it may still be 3824, but ensure the primary function is disclosed. |
| Small Sample Shipments | Even small quantities are subject to the same tariff rules. Do not declare as “Sample, Value $0.” |
| Re-Exports | If ZMBT is imported and re-exported, consider In-Bond procedures to defer duties. |
🌍 V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3824.99.92.00 |
40.3% | SDS, OSHA Compliance | High tariff due to 301 + IEEPA |
| 🇨🇳 China | 2930.90.60.00 or 3824.99.92.00 |
5-6% | None | Lower tariff, easy clearance |
| 🇪🇺 EU | 3824.99.97 |
0-6% | REACH Registration Mandatory | REACH compliance is critical |
| 🇮🇳 India | 2930.90.90 |
7.5% + SWS | BIS Standard | Anti-dumping duties may apply |
| 🇯🇵 Japan | 3824.99.990 |
3.4% | JIS Standards | No major surtaxes |
📌 Conclusion:
- USA is the most expensive market for ZMBT imports due to combined Section 301 and IEEPA tariffs.
- EU requires REACH registration for any substance produced or imported in quantities >1 ton/year. This is a significant regulatory hurdle.
- China origin goods face 40.3% duty in the US, making cost optimization essential.
📌 VI. Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Declaring ZMBT as “Rubber Part” (HS 4016)
👉 Consequence: Wrong classification → Audit + Back Taxes + Penalties. ZMBT is a chemical, not a rubber product.
❌ Mistake 2: Omitting CAS Number (120-95-0) in Declaration
👉 Consequence: Customs cannot verify the product → Delay + Examination Hold.
❌ Mistake 3: Not Providing SDS
👉 Consequence: US Customs and Border Protection (CBP) may detain the shipment for safety review.
❌ Mistake 4: Using “General Chemical” as Description
👉 Consequence: Lack of specificity → Higher scrutiny + Potential Misclassification.
✅ Correct Practice:
“ZMBT Powder (Zinc 2-Mercaptobenzothiazole), CAS No. 120-95-0, Purity 98%, Used as Rubber Accelerator, Grade: Industrial”
🎯 VII. Conclusion: Precision Classification, Cost Control, Compliance!
🎯 Remember the Mantra:
🔹 “ZMBT is Chemical, Not Rubber. CAS 120-95-0 is Key. 40.3% in US is Real. SDS is Mandatory.”
🔹 “HS Code 3824 is Safe. 301 and IEEPA are Heavy. Declare Precisely.”
📌 Pro Tip:
If your ZMBT is originally manufactured in Vietnam, Thailand, or India, you may avoid the 25% Section 301 tariff. However, ensure substantial transformation occurs. Simple repackaging will not suffice.
Recommendation: Apply for a Pre-Decision Ruling from CBP if unsure about classification.
📣 Immediate Action:
📞 Contact a licensed customs broker + Provide SDS + Verify Origin Rules
🚀 Minimize Duties, Maximize Efficiency, Stay Compliant!
✨ Professional Customs Clearance Starts with Accurate Classification!
💼 Your Every Dollar is Worth Calculating!
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.