无机硬化剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 2833190000 | 35.0% | CN | US | Official Doc |
| 2833406050 | 38.1% | CN | US | Official Doc |
| 3824993990 | 35.0% | CN | US | Official Doc |
| 3824993990 | 35.0% | CN | US | Official Doc |
| 3214905000 | 38.25% | CN | US | Official Doc |
| 3214901000 | 35.0% | CN | US | Official Doc |
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AI Analysis
🧪 Inorganic Hardener (Inorganic Hardening Agents)
🌐 HS Code Reference & Customs Clearance Guide | 2024 Latest Tariff Analysis | Professional-Level Clearance Strategy
📌 Part 1: Product Definition & Classification: Do You Really Understand "Inorganic Hardener"?
Inorganic Hardeners are critical chemical additives used in construction materials, concrete curing, grouting, and industrial coatings. They function by promoting chemical reactions that solidify or strengthen substrates. In international trade, they are classified as chemical mixtures, inorganic salts, or specialized chemical preparations.
Key Distinction: - Chemical Mixtures (HS 3824): Blends of various inorganic compounds used as general-purpose hardeners or additives. - Inorganic Salts (HS 2833): Specific compounds like sulfates or aluminates with defined chemical formulas. - Chemical Preparations (HS 3214): Formulated products like grouts, sealants, or anti-washout admixtures where the hardener is part of a larger functional mix.
⚠️ Critical Differentiator:
- If the product is a generic mixture of inorganic chemicals without a specific salt classification → HS 3824.99
- If the product is a specific inorganic salt (e.g., Aluminum Sulfate, Sodium Sulfate) → HS 2833.xx
- If the product is a prepared mixture for filling/sealing (like epoxy-free grout) → HS 3214.90
📦 Part 2: HS Code Classification Details (2024/2026 Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Classification Logic |
|---|---|---|---|
3824.99.39.90 |
Inorganic hardeners; inorganic compound mixtures | General inorganic chemical additives, non-specific blends | ✅ Chemical Mixture: Fits "Chemical products and preparations, not elsewhere specified." |
2833.19.00.00 |
Inorganic hardeners containing sulfates or aluminates | Products rich in sulfate or aluminum salts | ✅ Inorganic Salt: Specifically classified under sulfates/aluminates of Chapter 28. |
2833.40.60.50 |
Inorganic hardeners; inorganic salts | Metal salts like over-sulfates or other metal-based salts | ✅ Inorganic Salt: Classified as "Other inorganic salts" not elsewhere specified. |
3214.90.50.00 |
Inorganic hardeners; chemical preparations | Grouts, sealants, fillers where hardness is the main function | ✅ Preparation: Fits "Other preparations for laying floors, walls, etc." |
3824.99.31.00 |
Inorganic coagulants/hardeners (similar to above) | Specific inorganic compound mixtures for coagulation/hardening | ✅ Chemical Mixture: Similar to 3824.99.39.90 but specific sub-category for certain blends. |
🔍 Key Reminder:
- Do not confuse "Inorganic Hardener" with "Epoxy Resin" (which would be Chapter 39 or 35).
- If the product is pure salt (e.g., pure Sodium Silicate), Chapter 28 (2852) might apply, but the provided data points to 2833 (Sulfates/Aluminates) or 3824 (Mixtures).
- Prepared Mixtures (like cement-based grouts) go to 3214, while raw chemical additives go to 3824 or 2833.
💰 Part 3: 2024/2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Time: Current Trade Relations (Post-2018 Trade War Rates)
🎯 1. 3824.99.39.90 —— Inorganic Compound Mixtures (General Chemicals)
| Item | Content |
|---|---|
| Base Duty Rate | 0.0% (ad valorem) |
| Section 301 Surcharge | +25.0% (USITC Footnote 9903.88.01 / HTS 9903.88.01) |
| Section 122 Surcharge | +10.0% (Specific to certain chemical products from China) |
| Total Effective Rate | 35.0% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Exemption | ❌ Not Applicable (Highly scrutinized) |
| Legal Path | HTS:3824.99.39.90 → Section 301: 9903.88.01 → Section 122: Specific |
📌 Explanation:
- The 0% base rate makes it look attractive, but the 25% Section 301 tariff is the standard penalty for Chinese chemical goods.
- The additional 10% Section 122 tariff applies to specific chemical categories, bringing the total to 35%.
- This is a high-cost item for importers; margin analysis is crucial.
🎯 2. 2833.19.00.00 —— Inorganic Hardeners (Sulfates/Aluminates)
| Item | Content |
|---|---|
| Base Duty Rate | 0.0% |
| Section 301 Surcharge | +25.0% |
| Section 122 Surcharge | +10.0% |
| Total Effective Rate | 35.0% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Path | HTS:2833.19.00.00 → Section 301: 9903.88.01 → Section 122 |
📌 Note:
- Identical tax burden to3824.99.39.90.
- Even if classified as a "pure salt" under Chapter 28, the Section 301 and 122 surcharges still apply heavily.
- Do not assume Chapter 28 goods are tariff-free; the trade war measures override base rates.
🎯 3. 2833.40.60.50 —— Inorganic Hardeners (Other Inorganic Salts)
| Item | Content |
|---|---|
| Base Duty Rate | 3.1% |
| Section 301 Surcharge | +25.0% |
| Section 122 Surcharge | +10.0% |
| Total Effective Rate | 38.1% |
| Tax Calculation | CIF Value × 38.1% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Path | HTS:2833.40.60.50 → Section 301 → Section 122 |
📌 Warning:
- The base rate is higher (3.1%) compared to the previous two codes.
- Total effective tax is 38.1%, making this the most expensive classification in the list.
- Ensure your product truly fits this "other inorganic salt" description; misclassification can lead to audits.
🎯 4. 3214.90.50.00 —— Inorganic Hardeners (Chemical Preparations/Grouts)
| Item | Content |
|---|---|
| Base Duty Rate | 3.25% |
| Section 301 Surcharge | +25.0% |
| Section 122 Surcharge | +10.0% |
| Total Effective Rate | 38.25% |
| Tax Calculation | CIF Value × 38.25% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Path | HTS:3214.90.50.00 → Section 301 → Section 122 |
📌 Note:
- If your product is a ready-to-use grout or sealant containing inorganic hardeners, this is the correct code.
- The 38.25% rate is the highest in the dataset.
- Justification must focus on the preparation aspect (e.g., "Antiwashout Admixture for Concrete").
🎯 5. 3824.99.31.00 —— Inorganic Coagulants/Hardeners (Specific Mixtures)
| Item | Content |
|---|---|
| Base Duty Rate | 6.5% |
| Section 301 Surcharge | +25.0% |
| Section 122 Surcharge | +10.0% |
| Total Effective Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Path | HTS:3824.99.31.00 → Section 301 → Section 122 |
📌 Warning:
- This code has the highest base rate (6.5%) among all options.
- Total effective tax hits 41.5%.
- Only use if the product is a specific type of inorganic coagulant mixture that fits this narrow subheading. Avoid if possible due to high cost.
🛠️ Part 4: Customs Clearance Practical Advice (Avoiding Pitfalls)
✅ 1. Documentation Checklist (Mandatory)
| Document | Required | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Detailed chemical composition, CAS numbers, and concentration of active ingredients. |
| ✅ Material Safety Data Sheet (MSDS/SDS) | ✔️ | Critical for customs and safety; must state "Inorganic" and "Hardeners." |
| ✅ Certificate of Analysis (COA) | ✔️ | Proves the product matches the declared HS Code (e.g., sulfate content for HS 2833). |
| ✅ Commercial Invoice | ✔️ | Clearly state "Inorganic Hardener" and avoid vague terms like "Chemical." |
| ✅ Packing List | ✔️ | Net/Gross weight, volume, and number of packages. |
| ✅ Free Sale Certificate | ✔️ | Optional but recommended for chemical imports. |
✅ 2. Declaration Tips (Key Strategies)
🔥 "Accurate Composition, Precise Description, Avoid Vague Terms!"
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Generic Inorganic Blend | Inorganic Hardener Mixture |
"Chemical Additive" (Too vague) |
| Sulfate-based Hardener | Aluminum Sulfate Hardener |
"Inorganic Salt" (Too broad) |
| Grout/Sealant Product | Inorganic Grout Preparation |
"Construction Chemical" (Too vague) |
| Pure Salt | Sodium Sulfate (Inorganic) |
"Hardener" (Missing chemical identity) |
✅ 3. Special Circumstances Handling
| Situation | Handling Advice |
|---|---|
| Mixed Ingredients | Provide full chemical breakdown. If >50% is one salt, use Chapter 28; otherwise, Chapter 38. |
| Packaging Type | If in drums vs. bags, ensure MSDS matches. Liquids may have different handling codes. |
| Intended Use | Declare "For Concrete Curing" or "For Grouting" to support HS 3214 if applicable. |
| Origin Proof | Ensure Certificate of Origin explicitly states "Made in China" to confirm Section 301/122 applicability. |
🌍 Part 5: Global Market Comparison (2024/2026)
| Country/Region | Recommended HS Code | Approx. Tariff (China Origin) | Certifications | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3824.99.39.90 |
35.0% | SDS, TSCA | High Section 301/122 taxes. |
| 🇪🇺 EU | 3824.99 |
~5-6% | REACH, CLP | No Section 301/122. REACH registration required. |
| 🇨🇳 China | 3824.99 |
~5-8% | GB Standards | Domestic trade standard. |
| 🇦🇺 Australia | 3824.99 |
~5% | AICIS | Low base duty, no trade war surcharges. |
| 🇯🇵 Japan | 3824.99 |
~0-5% | JIS | Free Trade Agreement benefits may apply. |
📌 Conclusion:
- The US market is the most expensive for importing Inorganic Hardeners from China due to Section 301 (25%) and Section 122 (10%) tariffs.
- Total tariffs can exceed 40% depending on the specific chemical composition.
- EU, Australia, and Japan are far more cost-effective, with base duties only.
📌 Part 6: Common Errors & Pitfalls (Lessons Learned)
❌ Error 1: Using vague terms like "Chemical" or "Additive" on the invoice.
👉 Consequence: Customs will classify under a higher/default duty rate (e.g., 6.5% base) → Total 41.5%.
❌ Error 2: Misclassifying a "Prepared Grout" as a "Pure Salt."
👉 Consequence: If it's a mixture, it should be HS 3824/3214. If declared as pure salt, it may be rejected for lacking purity proof.
❌ Error 3: Ignoring Section 122 Tariff.
👉 Consequence: Many importers only calculate Section 301 (25%) and forget the additional 10%, leading to underpayment and penalties.
❌ Error 4: Not providing MSDS/SDS.
👉 Consequence: Customs may hold the shipment for testing or refuse entry due to safety concerns.
✅ Correct Approach:
"Inorganic Hardener, Aluminum Sulfate Base, 98% Purity, For Concrete Curing, MSDS Attached, TSCA Compliant"
🎯 Part 7: Conclusion: Precision Classification Saves Money!
🎯 Remember the Mantra:
🔹 "Chapter 28 for Pure Salts, Chapter 38 for Mixtures, Chapter 32 for Preparations!"
🔹 "Section 301 is 25%, Section 122 is 10%, Total is 35%+!"
🔹 "HS Code Determines Duty, Error Costs Thousands!"
📌 Pro Tip:
If your inorganic hardener can be blended domestically in the US (e.g., importing raw salts and mixing with water/additives in the US), you might pay only the base duty (0-6.5%) + 301% (25%) but avoid Section 122 if the final product classification changes. Consult a trade attorney for substantial transformation strategies.
📣 Immediate Action:
📞 Engage a Licensed Customs Broker + Provide Detailed MSDS + Apply for Pre-Ruling (if possible)
🚀 Ensure Your Inorganic Hardeners Clear US Customs Efficiently, Avoiding Costly Delays and Penalties!
✨ Professional Clearance Starts with Accurate Classification!
💼 Your Every Dollar of Duty is Worth Calculating!
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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) — 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.