ZMBT Rubber Auxiliary Powder
CN β 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
π§ͺ ZMBT Rubber Auxiliary Powder: HS Code Classification & Customs Clearance Guide 2026
π HS Code Reference & Customs Clearance Strategy | 2026 Latest Tariff Analysis | Professional Compliance Guide
π One, Product Definition: What is ZMBT?
ZMBT (Zinc 2-Mercaptobenzothiazole) is a crucial vulcanization accelerator used extensively in the rubber industry. It is often referred to as a "Rubber Auxiliary" or "Rubber Additive."
In international trade, its classification hinges on two key factors: 1. Form: Powder (Solid chemical compound). 2. Function: Prepared additive for rubber processing.
β οΈ Key Classification Logic: - If declared as a "Rubber Auxiliary" or "Prepared Additive" specifically for rubber processing β Tends toward 3824.40.50.00. - If declared broadly as a "Chemical Preparation" or "Other Chemical Products" without specific rubber auxiliary intent β Tends toward 3824.99.29.00.
π¦ Two, HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided data, there are two primary HS Code references for ZMBT Rubber Auxiliary Powder. Note that while the physical product is the same, the declaration intent drives the classification difference.
| HS Code | Product Description | Application Logic | Tax Rate (US/CN Origin) |
|---|---|---|---|
3824.40.50.00 |
Rubber Auxiliaries, Prepared Specifically for rubber processing additives. |
Matches "Rubber Auxiliary" function. Recognized as a prepared additive for rubber vulcanization. | 40.0% |
3824.99.29.00 |
Other Chemical Products and Preparations General chemical preparations not elsewhere specified. |
Matches "Chemical Preparation" nature. Broader category for chemical mixtures/powders. | 41.5% |
π Critical Distinction: -
3824.40.50.00is more precise if the product is marketed and used explicitly as a rubber vulcanization accelerator. -3824.99.29.00is a fallback for general chemical preparations where the specific rubber auxiliary function is not the primary declared intent. - Tax Impact: The difference is 1.5% (41.5% vs. 40.0%). While seemingly small, on high-volume shipments, this is significant.
π° Three, 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Surcharges)
β Applicable Country: United States (US) β Country of Origin: China (CN) β Effective Date: Post-2025 (Current Active Rates)
π― 1. 3824.40.50.00 ββ Rubber Auxiliaries, Prepared
| Item | Content |
|---|---|
| Base Tariff | 5.0% (Ad Valorem) |
| Section 301 Surcharge | +25.0% (Additional Tariff) |
| Section 122 Surcharge | +10.0% (IEEPA-based surcharge for certain Chinese goods) |
| Total Tariff Rate | 40.0% |
| Tax Calculation | CIF Value Γ 40% |
| De Minimis Exemption | β Not Eligible (Section 301 & 122 surcharges typically deny de minimis for high-value industrial chemicals) |
| Legal Basis Path | USITC:3824.40.50.00 β FOOTNOTE:301:25% β IEEPA:122:10% |
π Explanation: - The 5% base rate is the standard MFN (Most Favored Nation) rate for rubber auxiliaries. - The 25% Section 301 surcharge applies to most Chinese chemical products. - The 10% Section 122 surcharge is a specific additional levy for certain imported goods from China. - Total: 40.0%. This is a high-cost category.
π― 2. 3824.99.29.00 ββ Other Chemical Products and Preparations
| Item | Content |
|---|---|
| Base Tariff | 6.5% (Ad Valorem) |
| Section 301 Surcharge | +25.0% (Additional Tariff) |
| Section 122 Surcharge | +10.0% (IEEPA-based surcharge) |
| Total Tariff Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | USITC:3824.99.29.00 β FOOTNOTE:301:25% β IEEPA:122:10% |
π Note: - The base rate is slightly higher (6.5% vs 5.0%) for general chemical preparations. - The surcharges remain the same. - Total: 41.5%. This category is less favorable due to the higher base rate.
π οΈ Four, Customs Clearance Practical Advice (Actionable Pitfall Avoidance Guide)
β 1. Required Documentation Checklist (Must-Have)
| Document | Required | Notes |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must detail chemical composition, CAS number, and explicitly state "Rubber Vulcanization Accelerator". |
| β Certificate of Analysis (COA) | βοΈ | Proves purity and chemical identity (ZMBT). |
| β Commercial Invoice | βοΈ | Description must match HS Code intent. Use "ZMBT Rubber Auxiliary Powder" for 3824.40. |
| β Bill of Lading (B/L) | βοΈ | Ensure package count and weight match invoice. |
| β Origin Certificate (CO) | βοΈ | Essential for proving CN origin and calculating correct surcharges. |
| β Safety Data Sheet (SDS) | βοΈ | Required for chemical safety compliance. |
β οΈ Warning: Do not simply declare as "Chemical Powder." This vague description often triggers customs audits, leading to reclassification to
3824.99.29.00(higher tax) or delays.
β 2. Declaration Strategy (Key Tips)
π₯ "Be Specific, Be Precise: 'Rubber Auxiliary' vs. 'General Chemical'"
| Scenario | Recommended HS Code | Reasoning |
|---|---|---|
| Product is explicitly used as a rubber accelerator | 3824.40.50.00 |
Most accurate. Lower base rate (5%). Must support with specs showing rubber industry application. |
| Product is a chemical intermediate with no specific rubber intent stated | 3824.99.29.00 |
Higher base rate (6.5%). Use only if specific rubber auxiliary function cannot be proven or declared. |
| Mixed shipment with other chemicals | Separate Lines | Declare ZMBT separately under 3824.40.50.00 to capture the lower 5% base rate. Do not bundle into a generic "Chemical Mix" line. |
β 3. Special Considerations for ZMBT
| Issue | Advice |
|---|---|
| Chemical Safety | ZMBT is a hazardous chemical in some contexts. Ensure SDS is up-to-date and compliant with US DOT/OSHA regulations. |
| Section 122 & 301 | Both surcharges apply. No easy loophole. Plan for ~40-41.5% total tax. |
| De Minimis | Do not rely on $800 de minimis exemption. High-value industrial chemicals are often scrutinized. |
| Labeling | Ensure labels include proper hazard warnings as per US regulations. |
π Five, Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Total Tariff (Est.) | Notes |
|---|---|---|---|
| πΊπΈ USA | 3824.40.50.00 |
40.0% | High due to 301 + 122 surcharges. |
| π¨π³ China | 2930.90.90.00 |
~5-7% | Different classification system. Base rate is much lower. |
| πͺπΊ EU | 3824.40.00 |
0% (if eligible) | Check EUCER for specific rubber auxiliaries. No US-style surcharges. |
| π¬π§ UK | 3824.40.00 |
5-6% | Post-Brexit rules. Generally lower than US. |
π Conclusion: - USA is the most expensive market due to aggressive tariffs. - EU and UK are more favorable for rubber auxiliaries. - If exporting to the US, accurate classification under
3824.40.50.00is critical to avoid the 1.5% penalty of3824.99.29.00.
π Six, Common Mistakes & Pitfalls (Lessons Learned)
β Mistake 1: Declaring as "Chemical Powder" without specifying "Rubber Auxiliary."
π Result: Customs may reclassify to 3824.99.29.00 (41.5%) or demand additional proof, causing delays.
β Mistake 2: Ignoring Section 122 Surcharge. π Result: Underpayment of taxes. Customs will assess back-taxes + penalties.
β Mistake 3: Using vague descriptions like "ZMBT" only. π Result: Ambiguity leads to audits. Always include "Rubber Auxiliary" or "Vulcanization Accelerator."
β Mistake 4: Assuming de minimis applies. π Result: High-value chemical shipments are often excluded from de minimis exemptions under Section 301.
β Correct Practice:
Description: "ZMBT (Zinc 2-Mercaptobenzothiazole) Rubber Vulcanization Accelerator, Powder, 99% Purity, CAS No. 149-29-7" HS Code:
3824.40.50.00Tax Plan: Budget for 40.0% total duty.
π― Seven, Conclusion: Precision Saves Money
π― Remember the Mantra:
πΉ "Specify 'Rubber Auxiliary' to save 1.5%." πΉ "Declare 'ZMBT Rubber Accelerator Powder' for clarity." πΉ "Budget 40% for US import duties."
π Pro Tip:
If your shipment is large, consider applying for an Advance Ruling from US Customs and Border Protection (CBP) to lock in the 3824.40.50.00 classification and avoid future disputes.
π£ Take Action Now:
π Consult a Customs Broker + Provide Detailed Spec Sheet + Apply for Pre-Ruling if needed. π Ensure smooth clearance, avoid penalties, and maximize your profit margins!
β¨ Professional Customs Compliance, Starting with Precise Classification! πΌ Every Dollar Saved is a Dollar Earned!
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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) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β 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 β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β 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.