Rubber Accelerator CBS (Paste)
CN โ US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3824992900 | 41.5% | CN | US | Official Doc |
| 3824992100 | 35.0% | CN | US | Official Doc |
| 3824992100 | 35.0% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
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AI Analysis
๐ ๏ธ Rubber Accelerator CBS (Paste) | N-Cyclohexyl-2-benzothiazole sulfenamide Dispersion
๐ HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Classification Strategy
๐ I. Product Definition: What Exactly is "CBS Paste"?
Rubber Accelerator CBS (N-Cyclohexyl-2-benzothiazole sulfenamide) is a primary vulcanization accelerator widely used in the rubber industry to control cure rates and improve processing safety. When supplied as a "Paste" (also known as Dispersion or Slurry), it is not a pure chemical compound but a preparation consisting of the CBS active ingredient dispersed in a carrier medium (such as water, oil, or polymer latex) to facilitate easier handling, dust reduction, and uniform mixing with rubber compounds.
โ ๏ธ Critical Classification Distinction:
- If declared as "Pure CBS" (Solid powder/crystals) โ It is a specific organic chemical compound.
- If declared as "CBS Paste/Dispersion" โ It is considered a "Preparation" or "Mixture" containing sulfur-containing organic compounds, often falling under different HS codes depending on the concentration and specific formulation.
- Key Risk: Misdeclaring "Paste" as "Pure Chemical" can lead to severe customs penalties due to tariff discrepancies.
๐ฆ II. HS Code Classification Analysis (Based on Provided Data)
Based on the provided <DATA>, here are the two most relevant HS Codes for CBS Paste, along with explanations for why each applies or might be rejected.
| HS Code | Product Description (From Data) | Applicability to "CBS Paste" | Tax Status |
|---|---|---|---|
| 2930.90 | Other organic compounds containing sulfur, not elsewhere specified or included, including derivatives of thiocarbamates, used as accelerators in rubber vulcanization. | โ
Highly Relevant CBS is a thiocarbamate derivative (specifically a sulfenamide). While "Paste" implies a mixture, customs often classify rubber accelerators under Chapter 29 if the primary component is the chemical. However, if the paste contains significant non-sulfur binders, this may be challenged. |
โ Error "Failed to retrieve tax information" |
| 2928.99 | Other heterocyclic compounds with oxygen, nitrogen, sulfur, or halogens, not elsewhere specified, including thiocarbamate derivatives used in rubber processing. | โ
Alternative Option CBS contains sulfur, nitrogen, and oxygen in a heterocyclic structure (benzothiazole ring). This code captures "other" heterocyclic compounds used in rubber. It is a broader catch-all for sulfur-nitrogen compounds not strictly fitting 2930. |
โ Error "Failed to retrieve tax information" |
๐ Important Note on "Paste" vs. "Pure":
The provided data describes pure chemical compounds (derivatives of thiocarbamates). "CBS Paste" is a preparation/mixture.
- If the paste is >90% CBS and the carrier is negligible, 2930.90 is the strongest candidate.
- If the paste contains significant additives, binders, or carriers, it may technically fall outside Chapter 29 (Chemicals) and into Chapter 38 (Prepared Binders/Chemical Products), but the provided data for Chapter 38 (3824.99) relates to "Foundry Binders" and "Coal Tar Mixtures," which are INAPPLICABLE to rubber accelerators.
- Conclusion: Based strictly on the provided data, the best fit for the active ingredient (CBS) is 2930.90. The "Paste" form is a physical state of this chemical. If customs rejects it as a "mixture," 2928.99 is the backup.
๐ฐ III. Tariff Rate Detailed Analysis (2026 Update)
โ Applicable Jurisdiction: Not specified in data, but tax details are missing.
โ Critical Warning: The provided data explicitly states: "Failed to retrieve tax information" and "Error" for both codes.
๐ฏ 1. HS Code 2930.90 โ Sulfur-Containing Organic Compounds (CBS)
| Item | Detail |
|---|---|
| Base Rate | โ ๏ธ Unknown/Error (Data Retrieval Failed) |
| Additional Duties | โ ๏ธ Unknown/Error |
| Total Tax | Error |
| Legal Description | "Other organic compounds containing sulfur... including derivatives of thiocarbamates, used as accelerators in rubber vulcanization." |
| Interpretation | This code targets the chemical identity of CBS. Even in paste form, if CBS is the primary value driver, this is the standard classification for sulfur-based accelerators. |
๐ฏ 2. HS Code 2928.99 โ Other Heterocyclic Compounds
| Item | Detail |
|---|---|
| Base Rate | โ ๏ธ Unknown/Error (Data Retrieval Failed) |
| Additional Duties | โ ๏ธ Unknown/Error |
| Total Tax | Error |
| Legal Description | "Other heterocyclic compounds... including thiocarbamate derivatives used in rubber processing." |
| Interpretation | This is a broader category. Use if 2930.90 is disputed. CBSโs benzothiazole ring is heterocyclic, making this technically accurate but less specific than 2930.90 for sulfur accelerators. |
๐ Explanation:
- The system indicates a data failure for tax retrieval. This is common for niche chemical codes or regions with complex tariff schedules.
- DO NOT ASSUME 0% or standard rates. You must consult local customs authority or a professional broker for the exact rate for 2930.90 and 2928.99 in your specific country.
- Note: The other codes in the data (3824.99.21.00and3824.99.29.00) are for foundry binders and coal tar mixtures. These are WRONG for rubber accelerators and should be avoided.
๐ ๏ธ IV. Customs Clearance Practical Advice (Pitfall Avoidance Guide)
โ 1. Documentation Checklist (Essential for Chemicals)
| Document | Requirement | Why Itโs Critical |
|---|---|---|
| โ MSDS (Material Safety Data Sheet) | โ๏ธ Mandatory | Proves chemical composition, hazards, and whether itโs a "pure" chemical or "preparation." |
| โ Certificate of Analysis (COA) | โ๏ธ Mandatory | Shows the percentage of CBS active ingredient vs. carrier/paste medium. |
| โ Formula/Composition List | โ๏ธ Mandatory | Must list all ingredients. If >10% carrier, customs may question Chapter 29 classification. |
| โ Usage Declaration | โ๏ธ Mandatory | Explicitly state: "Rubber Vulcanization Accelerator, Not for Foundry/Casting Use." |
| โ Product Labeling | โ๏ธ Mandatory | Must match invoice: "N-Cyclohexyl-2-benzothiazole sulfenamide (CBS) Paste." |
โ 2. Classification Strategy (Key Mnemonic)
๐ฅ "Active Ingredient Rules, Paste is Just a Form, Avoid Foundry Codes, Check the Sulfur!"
| Scenario | Recommended HS Code | Reason |
|---|---|---|
| CBS Paste (>90% CBS) | 2930.90 |
Primary component is a sulfur-containing thiocarbamate derivative. |
| CBS Paste (Low % CBS, High Binder) | โ ๏ธ Risk | May be reclassified as a chemical preparation (Chapter 38), but NOT 3824.99 (foundry). |
| Pure CBS Powder | 2930.90 |
Clear fit for "organic compound containing sulfur." |
| Any Product with Coal Tar | โ Avoid | Do NOT use 3824.99 codes; they are for coal tar/finding binders, not rubber accelerators. |
โ 3. Special Handling Tips
| Issue | Solution |
|---|---|
| "Paste" Ambiguity | Clarify in invoice: "CBS Accelerator in Aqueous/Oil Dispersion, 70% CBS Active." |
| Customs Scrutiny | Provide a binding classification ruling from your local customs authority if possible. |
| Tax Error | Since data shows "Error," do not rely on automated systems. Manually verify rates with a licensed customs broker. |
| Safety Regulations | CBS is an irritant. Ensure compliance with REACH (EU), TSCA (USA), or local chemical regulations. |
๐ V. Global Market Comparison (2026)
| Region | Likely HS Code | Tax Implication | Note |
|---|---|---|---|
| ๐บ๐ธ USA | 2930.90.80 (or similar) |
Section 301 Tariffs Apply | Check if CBS is on the USITC exclusion list. Rates can be 10-25% + base. |
| ๐ช๐บ EU | 2930.90.99 |
Base Duty ~6.5% | Subject to REACH compliance. No Section 301 equivalent. |
| ๐จ๐ณ China | 2930.90.90 |
Base Duty ~0-5% | Major producer of CBS. Export subsidies may apply. |
| ๐ฎ๐ณ India | 2930.90.90 |
Base Duty ~7.5% | High import duties on chemical accelerators. |
๐ Conclusion:
- USA: High risk due to trade wars. Verify exclusions.
- EU/China/India: Standard chemical duties. Focus on REACH/Regulatory compliance.
- Data Limitation: The provided tax data is incomplete. Always verify with local authorities.
๐ VI. Common Errors & Pitfalls (Lessons Learned)
โ Error 1: Using 3824.99 codes because itโs a "paste/binder."
๐ Consequence: Customs rejection. These codes are for foundry molds/coal tar, not rubber accelerators.
โ
Fix: Use 2930.90.
โ Error 2: Declaring "CBS Paste" without specifying active ingredient percentage.
๐ Consequence: Customs may classify as a mixture under Chapter 38 or demand additional docs.
โ
Fix: Include COA and MSDS. State "70% CBS Active Ingredient."
โ Error 3: Assuming Tax = 0% because "Other" is vague.
๐ Consequence: Underpayment penalties.
โ
Fix: Manually verify rates. The provided data shows "Error," so assume non-zero and plan budget accordingly.
๐ฏ VII. Conclusion: Precision in Chemical Classification
๐ฏ Remember the Mantra:
๐น "CBS is Sulfur, Chapter 29 is Key. Paste is a Form, Not a Foundry. Avoid 3824, Check the Tax Rate!"
๐น "Data Error? Donโt Guess. Ask a Broker. Customs Loves Docs."
๐ Pro Tip:
Since the provided data shows Tax Error, you MUST consult a professional customs broker or use an official tariff database (e.g., USITC Harmonized Tariff Schedule, EU TARIC) to get the exact duty rate for 2930.90 in your destination country. Do not rely on the "Error" status for financial planning.
๐ฃ Immediate Action:
๐ Contact a Licensed Customs Broker
๐ Prepare MSDS & COA
๐ Verify Local Tariff for 2930.90
๐ Ensure Smooth, Compliant Clearance for Your Rubber Chemicals!
โจ Professional Customs Classification, Starting with Accuracy!
๐ผ Your Chemical Supply Chain Demands Precision!
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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) 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.