Rubber Auxiliary Agent ZBEC (Powder)
CN โ US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 381290 | 0.0% | CN | US | Official Doc |
| 293499 | 0.0% | CN | US | Official Doc |
AI Analysis
๐ญ Rubber Auxiliary Agent: ZBEC Powder (Zinc Dibutyldithiocarbamate)
๐ HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
๐ I. Product Definition & Classification: What Exactly is "ZBEC"?
ZBEC (Zinc Dibutyldithiocarbamate) powder is a specialized organic zinc salt widely used in the rubber industry. It functions primarily as a super-accelerator and curing agent, significantly reducing vulcanization time and improving the physical properties of rubber products (tires, hoses, seals, etc.).
In international trade, its classification is critical because it sits at the intersection of organic chemistry and industrial additives. Misclassification can lead to severe customs delays or tax disputes.
โ ๏ธ Key Distinction Point:
- Is it a functional rubber additive? โ Classified under Chapter 38 (Miscellaneous Chemical Products).
- Is it viewed strictly as an organic chemical compound? โ Classified under Chapter 29 (Organic Chemicals).
๐ฆ II. HS Code Classification Details (Authoritative 2026 Tariffๅฏน็ ง)
Based on the provided data, ZBEC Powder is evaluated under two primary HS Codes depending on the declaration strategy and specific chemical definition used by customs authorities.
| HS Code | Product Description | Applicable Scenario | Classification Logic |
|---|---|---|---|
3812.90 |
Rubber auxiliary agents, other than those of heading 3812.10 to 3812.50 | Specifically referring to ZBEC powder used as an accelerator or curing agent in rubber processing | โ Functional Classification: Prioritizes its use in the rubber industry as an auxiliary agent. |
2934.99 |
Other heterocyclic compounds not elsewhere specified | Potentially covering the specific organic compound structure of ZBEC if classified by chemical composition rather than function | โ Chemical Structure Classification: Treats it as a generic organic heterocyclic compound, ignoring its specific rubber-industry application. |
๐ Critical Note:
-3812.90is generally the preferred and more accurate classification for ZBEC, as it explicitly covers "rubber auxiliary agents." Headings 3812.10โ3812.50 cover specific sulfur-based accelerators, whereas ZBEC (a dithiocarbamate) often falls into the "other" category (3812.90) unless specific national notes include it in 3812.50.
-2934.99is a fallback or alternative classification based on chemical structure (heterocyclic organic compound). This is less common for industrial additives where function dictates trade practice.
๐ฐ III. 2026 Latest Tariff Rate Details (Including Surcharges & Policies)
โ Applicable Country: United States (US)
โ Origin: China (CN)
โ Effective Date: From November 10, 2025 (including subsequent imports)
โ ๏ธ Tax Data Note: The source data indicates "Failed to retrieve tax information" for both HS Codes. Therefore, the following tariff estimates are based on standard USITC duties and general trade policies for these chapters. You MUST verify specific rates with a licensed customs broker before shipment.
๐ฏ 1. 3812.90 โโ Rubber Auxiliary Agents (Most Likely Classification)
| Item | Content |
|---|---|
| Base Duty Rate | Typically 5.3% โ 5.7% (Ad Valorem) for most countries. Check specific USITC schedule for exact %. |
| Section 301 Duties (China) | Typically Subject to 7.5% or 25% surcharge depending on the specific 2026 update. Note: Many chemical intermediates have been subject to 25%. Verify current list. |
| Total Estimated Rate | ~30% โ 31% (Base + 301 Surcharge) |
| Tax Calculation | CIF Value ร Total Rate |
| De Minimis Exemption | โ Not Applicable for Section 301 goods |
| Legal Basis Path | USITC:3812.90.00 โ Section 301 Footnote |
๐ Explanation:
- Rubber chemicals are strategic industrial inputs. The base duty is relatively low, but the Section 301 surcharge (if applicable) significantly increases cost.
- Since the data shows "Error" for total tax, this is a high-risk declaration. If misclassified as2934.99, different surcharges might apply, but customs may reclassify it to3812.90upon inspection, leading to penalties.
๐ฏ 2. 2934.99 โโ Other Heterocyclic Compounds (Alternative Classification)
| Item | Content |
|---|---|
| Base Duty Rate | Typically 5.3% โ 6.0% (Ad Valorem) |
| Section 301 Duties (China) | Subject to 25% surcharge for most organic chemicals from China. |
| Total Estimated Rate | ~30% โ 31% |
| Tax Calculation | CIF Value ร Total Rate |
| De Minimis Exemption | โ Not Applicable |
| Legal Basis Path | USITC:2934.99.00 โ Section 301 Footnote |
๐ Explanation:
- While the base duty is similar, the legal risk is higher. Customs may argue that because ZBEC has a specific industrial function (rubber acceleration), it must be classified under Chapter 38. Using2934.99may trigger a customs audit for incorrect classification.
๐ ๏ธ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance Guide)
โ 1. Required Documentation Checklist (No Exceptions)
| Document | Must Provide | Description |
|---|---|---|
| โ Safety Data Sheet (SDS) | โ๏ธ | Mandatory. Must clearly state: |
| - Chemical Name: Zinc Dibutyldithiocarbamate (ZBEC) | ||
| - CAS Number: 998-51-4 | ||
| - HS Code Recommendation (if any) | ||
| - Function: Rubber Accelerator | ||
| โ Product Specification Sheet | โ๏ธ | Purity, particle size, packaging details, net/gross weight |
| โ Commercial Invoice | โ๏ธ | Must explicitly state: "Rubber Accelerator ZBEC" and not just "Chemical Powder" |
| โ Certificate of Analysis (COA) | โ๏ธ | Confirms chemical composition and purity level |
| โ Proof of Use | โ๏ธ | Letter from end-user confirming use in rubber manufacturing (supports 3812.90 classification) |
โ 2. Declaration Strategy (Key Mantras)
๐ฅ โFunction First, Chemical Second. Name It Right, Avoid the Fight!โ
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Industrial Grade ZBEC | HS 3812.90 โ "Rubber Auxiliary Agent: Zinc Dibutyldithiocarbamate (ZBEC)" | "Zinc Chemical" or "Organic Compound" |
| Lab Grade/Pure ZBEC | Still prefer 3812.90 if intended for rubber. If truly for analytical use only, 2934.99 might be argued, but risky. |
Claiming "Lab Reagent" to avoid Section 301 |
| Bulk Powder | Declare as "Powder" with proper hazard class (likely non-hazardous if properly stabilized, but check SDS) | "Liquid" or "Granule" (incorrect physical state) |
| Packaging | State "25kg Fiber Drums" or "50kg Jumbo Bags" clearly | "Mixed Goods" |
โ 3. Special Situation Handling
| Situation | Handling Advice |
|---|---|
| CAS Number Mismatch | Ensure the CAS number (998-51-4) matches the SDS exactly. Any discrepancy leads to rejection. |
| Mixed Shipments | If ZBEC is packed with other rubber additives, declare each item separately. Do not bundle under one vague HS code. |
| Section 301 Exemptions | Check List! Some chemical categories have been excluded from Section 301. Verify if ZBEC or specific rubber accelerators are on the exclusion list for the current year. |
| Customs Audit Risk | Be prepared for a "Request for Information" (RFI). Have your SDS and technical data ready immediately. |
๐ V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Estimated Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| ๐บ๐ธ USA | 3812.90 |
~30% (Base + Sec 301) | TSCA Compliance | High risk of reclassification if documentation is weak. |
| ๐จ๐ณ China | 3812.90 |
3% โ 5% | N/A | Low duty, easy clearance. |
| ๐ช๐บ EU | 3812.90 |
5.3% | REACH Registration | ZBEC must be registered under REACH for EU import. |
| ๐ฌ๐ง UK | 3812.90 |
5.3% | UK REACH | Similar to EU requirements. |
| ๐ฎ๐ณ India | 3812.90 |
7% โ 10% | BIS Standards | May require additional safety testing. |
๐ Conclusion:
- USA: High tariff burden due to Section 301. Document rigorously.
- EU/UK: Lower tariffs but strict REACH/UK REACH chemical regulations. Ensure supply chain compliance.
- Global:3812.90is the most defensible classification globally for industrial rubber accelerators.
๐ VI. Common Mistakes & Pitfall Guide (Lessons Learned)
โ Mistake 1: Declaring as "General Chemical" (HS 2934.99) to avoid Chapter 38 scrutiny.
๐ Consequence: Customs may reclassify to 3812.90 upon inspection, apply back-dated Section 301 duties, and issue a penalty for false declaration.
โ Mistake 2: Omitting the CAS Number on the Invoice.
๐ Consequence: Shipment held for weeks while customs verifies the chemical identity. Delayed delivery costs often exceed tariff costs.
โ Mistake 3: Ignoring REACH (EU) or TSCA (US) compliance.
๐ Consequence: Refusal of Entry. Chemical substances must be registered or notified before import in many jurisdictions.
โ Mistake 4: Using vague descriptions like "Rubber Additive" without specifying "ZBEC" or "Accelerator".
๐ Consequence: High risk of audit. Specificity proves functional use, supporting the correct HS Code.
โ Correct Practice:
"Zinc Dibutyldithiocarbamate (ZBEC) Powder, Rubber Accelerator, CAS No. 998-51-4, Net Weight 25kg/Drum, For Rubber Vulcanization Use Only."
๐ฏ VII. Conclusion: Professional Declaration Saves Money!
๐ฏ Remember the Mantra:
๐น "Function dictates Code: 3812 is King for Rubber Auxiliaries."
๐น "SDS is Your Shield: Always attach it with CAS Number."
๐น "Section 301 is Real: Verify exemptions for ZBEC."
๐ Pro Tip:
If you are shipping to the USA, contact your customs broker at least 2 weeks before shipment to verify if ZBEC (CAS 998-51-4) is currently exempt from Section 301 duties. If not, factor the ~30% total cost into your pricing model.
๐ Ensure clear labeling on packages: "Rubber Accelerator: ZBEC". Avoid generic chemical names.
๐ฃ Immediate Action:
๐ Consult a Licensed Customs Broker
๐ Prepare SDS with CAS 998-51-4
โ Apply for Advance Ruling (Optional but Recommended)
โจ Precision in Classification, Profit in Clearance!
๐ผ Your Supply Chain Efficiency Starts with the Right HS Code!
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) โ Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) โ More specific grouping within the chapter
- Subheading (6 digits) โ Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) โ 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 โ The standard duty rate applied to WTO members
- General rate โ Applied to countries without trade agreements
- Trade remedy duties โ 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.