Rubber Accelerator CZ (Powder)
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 284910 | 0.0% | CN | US | Official Doc |
| 350699 | 0.0% | CN | US | Official Doc |
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π§ͺ Rubber Accelerator CZ (Powder) β Chemical Products of Carbon
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Strategy
π 1. Product Definition & Classification: What is "Rubber Accelerator CZ"?
Rubber Accelerator CZ (Chemically known as N-Cyclohexyl-2-benzothiazylsulfenamide or CBS) is a critical processing aid used in the manufacturing of rubber products. It falls under the broader category of Chemical Products of Carbon.
In international trade, classification hinges on whether the substance is treated as an inorganic chemical (unlikely for organic accelerators unless specified otherwise) or an organic chemical preparation. Based on the provided data:
- Primary Classification: Organic chemical products of carbon.
- Key Distinction: It is a "prepared" chemical preparation used specifically for rubber processing (accelerating vulcanization), not a raw inorganic element.
β οΈ Critical Clarification:
- HS Code2849.10: Specifically targets carbides (e.g., Calcium Carbide). If your product is strictly a carbide, it goes here. However, "Rubber Accelerator CZ" is typically an organic sulfenamide, not a carbide.
- HS Code3506.99: Covers prepared glues and adhesives and chemical preparations for use as rubber processing aids where specific classification is unclear or when it doesn't fit strictly under Chapter 29 (Organic Chemicals) as a pure substance, or when classified as a "prepared product" under general heading 35.
Given the provided DATA constraints, we must map the product to the two specified codes.
π¦ 2. HS Code Classification Details (2026 Authorized Reference)
| HS Code | Product Description | Application Scenario | Classification Logic |
|---|---|---|---|
2849.10 |
Chemical products of carbon, including rubber accelerators classified under inorganic chemicals not elsewhere specified. | Carbides, Carbon Blacks (if specific), or Inorganic Carbon Compounds | β οΈ Likely Incorrect for CZ unless misclassified as an inorganic carbon product. CZ is organic. |
3506.99 |
Prepared glues/adhesives; chemical preparations for use as rubber processing aids/accelerators where specific classification is unclear. | Rubber Accelerators (like CZ/CBS), Adhesives, Prepared Processing Aids | β Most Likely Correct for "Prepared" organic accelerators not explicitly listed elsewhere. |
π Important Note:
- Rubber Accelerator CZ is chemically an organic compound.
- HS Code2849.10is generally for Carbides. Using this for an organic sulfenamide like CZ is a common misclassification risk.
- HS Code3506.99is the safer bet for "Prepared Chemical Preparations" for rubber if it doesn't fit a specific Chapter 29 heading.
- Always verify with local customs: Organic rubber accelerators are often classified under Chapter 29 (e.g., 2930.90 or 2931.90). However, based strictly on the providedDATA, we must choose between these two.
π° 3. 2026 Tariff Rate Details (Including Surcharges & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: From November 10, 2025 (including subsequent imports)
π― 1. 2849.10 β Chemical Products of Carbon (Inorganic)
| Item | Content |
|---|---|
| Base Rate | 0% (ad valorem) β Typical for carbides |
| USITC Surcharge | +25% (from USITC Footnote 9903.88.01) |
| IEEPA Surcharge | +10% (Targeting Chinese/HK products, from Nov 10, 2025) |
| Total Rate | 45% |
| Tax Calculation | CIF Value Γ 45% |
| De Minimis Eligible? | β No (deny_de_minimis) |
| Legal Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:2849.10 β FOOTNOTE:9903.88.01 |
π Explanation:
- If misclassified as a carbide (2849.10), you face a 45% total tariff.
- This is a high-risk classification for organic accelerators. Customs may reclassify to Chapter 29 or 35, leading to duty adjustments and penalties.
π― 2. 3506.99 β Prepared Glues & Chemical Preparations for Rubber
| Item | Content |
|---|---|
| Base Rate | 0% |
| USITC Surcharge | +25% |
| IEEPA Surcharge | +10% |
| Total Rate | 35% (Note: Some Chapter 35 items may have different base rates; assuming 0% base for this analysis based on typical trade data for adhesives/preparations) |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Eligible? | β No (deny_de_minimis) |
| Legal Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3506.99 β FOOTNOTE:9903.88.01 |
π Note:
- This classification is more accurate for "Rubber Accelerator CZ" as a "chemical preparation."
- However, organic rubber accelerators are often correctly classified under HS 2930.90 or 2931.90 (Chapter 29). If3506.99is the only valid option from your data, it is the preferred choice over2849.10.
π οΈ 4. Customs Clearance Practical Advice (Avoid Pitfalls)
β 1. Documentation Checklist (Non-negotiable)
| Document | Required | Description |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must state: "N-Cyclohexyl-2-benzothiazylsulfenamide (CBS)", Purity %, CAS No. (95-78-5). |
| β Certificate of Analysis (COA) | βοΈ | Confirms chemical composition and purity. |
| β Commercial Invoice | βοΈ | Clearly describe as "Rubber Accelerator CZ (CBS) - Organic Chemical Preparation". Avoid vague terms like "Chemical Powder". |
| β Safety Data Sheet (SDS) | βοΈ | Required for hazardous chemical declaration. |
| β Origin Certificate (CO) | βοΈ | Essential for proving Chinese origin (subject to surcharges). |
| β Packaging List | βοΈ | Show net/gross weight, number of bags, and packaging material. |
β 2. Declaration Tips (Key Mantras)
π₯ "Organic not Carbide, Preparation not Glue, Name Specific, Risk Reduced!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Pure Rubber Accelerator CZ | Use 3506.99 (as per provided data) or 2930.90 (if allowed). |
Use 2849.10 (Carbide) β High Audit Risk |
| Mixed Rubber Compounds | Declare as "Prepared Rubber Processing Aids" | Vague: "Chemical Mix" β Customs Hold |
| Bulk Powder | Specify "Powder, Bulk, Non-Hazardous" | Vague: "Industrial Chemical" β Delayed Release |
| Small Sample Shipments | Still declare full value; No De Minimis | Assume <$800 exemption β Confiscation |
β 3. Special Case Handling
| Situation | Handling Advice |
|---|---|
| Misclassification as Carbide | If declared as 2849.10, be prepared for Customs to challenge it. Provide CAS number and chemical structure to prove it's organic. |
| Chemical Hazard Status | Rubber Accelerator CZ is generally non-hazardous for transport but may require SDS. Confirm with IATA/IMDG if shipped by air/sea. |
| Pre-shipment Inspection | For large volumes, consider pre-shipment inspection to verify classification and HS Code compliance. |
| Voluntary Disclosure | If you discover a classification error before entry, use Voluntary Disclosure to mitigate penalties. |
π 5. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3506.99 (or 2930.90) |
25-35% (Base + Surcharges) | SDS, TSCA | High Risk for misclassification. |
| π¨π³ China | 2930.90 / 3506.99 |
0-5% | REACH (if exported to EU) | Low domestic tariffs. |
| πͺπΊ EU | 2930.90 |
0-6.5% | REACH Registration | REACH Compliance is mandatory. |
| π―π΅ Japan | 2930.90 |
0-7.5% | JIS | Standard chemical imports. |
π Conclusion:
- USA: High tariffs apply regardless of Chapter 29 or 35 if from China. Correct classification is critical to avoid penalties.
- EU: REACH compliance is the biggest hurdle, not just tariffs.
- China: Lowest risk, but ensure export documentation matches destination requirements.
π 6. Common Errors & Pitfalls (Lessons Learned)
β Error 1: Classifying Organic Accelerator as Carbide (2849.10)
π Consequence: Audit Flagged. Customs will demand proof it's not a carbide. Potential reclassification + penalties.
β Error 2: Vague Description: "Chemical Powder"
π Consequence: Customs Hold. Requires additional documentation, delays shipment by 7-14 days.
β Error 3: Assuming De Minimis Applies
π Consequence: Seizure. Chemical products are excluded from the $800 de minimis threshold in the US.
β Error 4: Ignoring REACH (for EU) or TSCA (for US) Compliance
π Consequence: Blocked Entry. Must verify if the substance is listed on TSCA Inventory (US) or REACH Register (EU).
β Correct Approach:
"Rubber Accelerator CZ (N-Cyclohexyl-2-benzothiazylsulfenamide), CAS 95-78-5, Purity β₯98%, Powder, for Industrial Rubber Processing. HS Code: 3506.99 (or 2930.90)."
π― 7. Conclusion: Precise Classification Saves Money!
π― Remember the Mantra:
πΉ "Organic, Not Carbide; Preparation, Not Glue; Name Specific, No Surprise!"
πΉ "HS Code Dictates Duty; 45% vs. 35% Matters; Misclassification Costs More!"
π Pro Tip:
If your Rubber Accelerator CZ is purely organic (not a mixture), consider if it can be classified under Chapter 29 (e.g., 2930.90.90.90). While the provided data limits us to 2849.10 and 3506.99, Chapter 29 is often the correct home for pure organic sulfenamides. If 3506.99 is the only option from your data, it is the safer choice than 2849.10.
π£ Immediate Action:
π Contact a licensed customs broker.
π Provide CAS Number 95-78-5 and SDS.
π Verify HS Code before shipment to avoid 45% misclassification risks!
β¨ Professional Customs Clearance Starts with Accurate Classification!
πΌ Every Penny Saved on Duty is Pure Profit!
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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.