Modified Water Treatment Polymer
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3824991100 | 35.0% | CN | US | Official Doc |
| 3824405000 | 40.0% | CN | US | Official Doc |
| 390690 | 0.0% | CN | US | Official Doc |
| 350691 | 0.0% | CN | US | Official Doc |
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AI Analysis
ποΈ Polymer-Modified Water Treatment Chemicals & Construction Materials
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: Are You Sure You Know "Polymer-Modified" Products?
"Polymer-Modified" products in the chemical and construction sectors are versatile materials where polymers are added to enhance performance (adhesion, flexibility, resistance). Based on the provided data, these products fall into two main categories: Construction Mortars and Chemical Additives (Antioxidants/Polyesters).
β οΈ Key Distinction Point:
- If the product is a mortar/concrete mixture modified with polymers for construction use β It falls under 3824.50.
- If the product is an antioxidant or pure polymer (like polyester) used as a chemical additive β It falls under 3812.39, 3812.39.60, or 3907.99.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Match)
| HS Code | Product Description | Summary from Data | Core Attributes |
|---|---|---|---|
3824.50.00.50 |
Polymer-Modified Mortar (Non-refractory) | Polymer-modified mortar, belongs to non-refractory mortar and concrete, polymer modification is a chemical ingredient | β Non-refractory mortar + Chemical modifier |
3824.50.00.10 |
Polymer-Modified Mortar (Non-refractory) | Polymer-modified mortar, matches non-refractory mortar/concrete material attributes, polymer modification is chemical | β Non-refractory mortar + Chemical modifier |
3812.39.90.00 |
Polymer-Modified Antioxidant | Polymer-modified antioxidant, polymer modification inferred as plastic/rubber material, antioxidant meets usage requirements | β Antioxidant + Plastic/Rubber Polymer |
3812.39.60.00 |
Polymer-Modified Antioxidant | Polymer-modified antioxidant, polymer modification logic matches modified aromatic chemicals, antioxidant meets material/usage | β Antioxidant + Modified Aromatic Chemical |
3907.99.50.50 |
Polymer-Modified Product (Polyester) | Polymer-modified product, core ingredient belongs to polyester category, matches other polyester material attributes | β Other Polyester + Polymer Modifier |
π Important Reminder:
- Mortars (3824.50): These are mixtures. Even if modified with polymers, if they are for construction (non-refractory), they stay in 3824.
- Antioxidants (3812.39): These are specific chemical additives. The "polymer modification" here refers to the chemical structure of the antioxidant itself or its carrier.
- Polyesters (3907.99): If the product is primarily a polyester polymer modified for specific water treatment or other industrial uses, it may fall here.
π° III. 2026 Latest Tariff Rate Details (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: Ongoing (Includes 301 Duties and Section 122 tariffs)
π― 1. 3824.50.00.50 & 3824.50.00.10 ββ Polymer-Modified Mortar (Non-Refractory)
| Item | Content |
|---|---|
| Base Tariff Rate | 0.0% (ad valorem) |
| Section 301 Surcharge | +25.0% (25% additional duty under US Trade Law Section 301) |
| Section 122 Tariff | +10.0% (10% additional duty under Section 122 of the Trade Act) |
| Total Effective Tax | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Eligibility | β Not Eligible (High tariff volume prevents de minimis exemption) |
| Legal Basis Path | USITC:3824.50.00.50 β 301 Footnote: 9903.88.01 β 122 Clause |
π Explanation:
- The base tariff is 0%, making the initial cost look low.
- However, the 35% total effective rate is significant.
- 25% comes from the ongoing trade war tariffs (Section 301).
- 10% comes from Section 122 (often related to national security or specific trade remedy measures).
- Total 35%: This is a high barrier for construction materials.
π― 2. 3812.39.90.00 ββ Polymer-Modified Antioxidant (Plastic/Rubber Type)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.0% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tax | 40.0% |
| Tax Calculation | CIF Value Γ 40% |
| De Minimis Eligibility | β Not Eligible |
| Legal Basis Path | USITC:3812.39.90.00 β 301 Footnote: 9903.88.01 β 122 Clause |
π Note:
- Base rate is higher (5%) than mortars because itβs a specialized chemical.
- The surcharges remain constant at 35% (25+10).
- Total 40%: Even higher cost impact.
π― 3. 3812.39.60.00 ββ Polymer-Modified Antioxidant (Aromatic Chemical Type)
| Item | Content |
|---|---|
| Base Tariff Rate | 6.5% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tax | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Eligibility | β Not Eligible |
| Legal Basis Path | USITC:3812.39.60.00 β 301 Footnote: 9903.88.01 β 122 Clause |
π Note:
- This is the most expensive classification among the antioxidants due to the higher base rate (6.5%).
- Use this only if the chemical structure strictly matches "modified aromatic chemical" logic.
π― 4. 3907.99.50.50 ββ Polymer-Modified Polyester Product
| Item | Content |
|---|---|
| Base Tariff Rate | 6.5% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Effective Tax | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Eligibility | β Not Eligible |
| Legal Basis Path | USITC:3907.99.50.50 β 301 Footnote: 9903.88.01 β 122 Clause |
π Note:
- If the product is primarily a polyester (even if modified), it falls under Chapter 39.
- The total tax burden is 41.5%, identical to the aromatic antioxidant category.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
β 1. Documentation Checklist (Must-Have)
| Document | Required? | Description |
|---|---|---|
| β Technical Data Sheet (TDS) | βοΈ | Must specify: "Polymer-Modified," chemical composition, intended use (mortar vs. chemical additive). |
| β Safety Data Sheet (SDS) | βοΈ | Crucial for chemical products (antioxidants, polyesters) to prove non-hazardous status (if applicable). |
| β Product Photographs | βοΈ | Show packaging, labels, and physical form (powder, liquid, paste). |
| β Commercial Invoice | βοΈ | Clearly state "Polymer-Modified Mortar" or "Polymer-Modified Antioxidant" β do not use vague terms like "Building Material." |
| β Certificate of Origin (CO) | βοΈ | Essential for calculating exact 301/122 duties. |
| β Formulation/Composition Report | βοΈ | To justify HS Code selection (e.g., is it >50% mortar base or >50% chemical base?). |
β 2. Declaration Tips (Key Mantra)
π₯ βMortar in 3824, Antioxidant in 3812, Polyester in 3907, Precision Saves 40%!β
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Construction mortar with polymer | 3824.50.00.xx |
Misclassifying as "Plastic" β 41.5% |
| Liquid antioxidant for rubber/plastic | 3812.39.90.00 |
Misclassifying as "Chemical Product n.e.c." β Risk of penalty |
| Polyester resin for water treatment | 3907.99.50.50 |
Misclassifying as "Mortar" β 35% vs 41.5% difference |
| Vague term: "Building Chemical" | Reject | Customs will reclassify and penalize |
β 3. Special Situations
| Situation | Handling Advice |
|---|---|
| OEM Custom Polymer | Provide formulation details. If >50% by weight is mortar, use 3824. |
| Water Treatment Specific | If the polymer is specifically for coagulation/flocculation, check if it fits 3824 (non-refractory mortar/adhesive) or 3907 (polymer). 3824 is safer for slurry-like forms. |
| Mixed Containers | Do not mix mortars and pure antioxidants in one shipment without clear separation. |
| Origin Fraud | Ensure origin is truly China. If transshipped, rules of origin apply strictly. |
π V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certifications | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3824.50.00.50 / 3812.39.90.00 |
35% - 41.5% | FDA (if food contact), TSCA | High surtaxes (25%+10%) |
| π¨π³ China | 3824.50.00 / 3812.39 |
0% - 6.5% | REACH (if EU bound), GB Standards | Low base tax, no surcharges |
| πͺπΊ EU | 3824.50 / 3812.39 |
0% - 6.5% | REACH, CLP | No 301/122 tariffs |
| π¦πΊ Australia | 3824.50 / 3812.39 |
0% - 5% | ASIC, TGA | Low tariffs |
| π―π΅ Japan | 3824.50 / 3812.39 |
0% - 5.5% | JIS, METI | Low tariffs |
π Conclusion:
- USA is the most expensive market due to Section 301 and Section 122 tariffs.
- EU, Japan, Australia, and China have significantly lower base tariffs but require strict REACH/Chemical Compliance documentation.
- Profit Margin Impact: A 35% vs. 5% tariff difference can make or break a project.
π VI. Common Errors & Pitfalls Guide (Blood-Teaching Lessons)
β Error 1: Declaring "Polymer-Modified Mortar" as "Plastic Granules" (3915)
π Consequence: If misclassified, Customs may apply 41.5% instead of 35%, or reject the entry for false declaration.
β Error 2: Using vague description "Chemical for Water Treatment"
π Consequence: Customs will classify under the highest applicable duty or request detailed breakdown, causing delay.
β Error 3: Ignoring Section 122 Tariff
π Consequence: Many importers only account for the 25% Section 301 tariff, missing the extra 10%, leading to underpayment penalties.
β Error 4: Confusing "Polymer-Modified Mortar" with "Refractory Mortar"
π Consequence: Refractory mortars have different HS codes and potentially different tariff rates. Ensure it is non-refractory.
β Correct Practice:
"Polymer-Modified Non-Refractory Mortar, Ready-to-Use, Chemical Additive Type, Model XYZ, SDS Provided"
π― VII. Conclusion: Precision Classification, Cost Control!
π― Remember Mantra:
πΉ βMortar is 35%, Antioxidant is 40-41%, Polymer is 41.5%. Donβt guess, declare correctly!β
πΉ β301 adds 25%, 122 adds 10%. Total 35%+ for mortars, 40%+ for chemicals.β
π Pro Tip:
- If your product is a pure polyester for industrial use, 3907.99.50.50 is correct.
- If itβs a construction mortar, 3824.50.00.50 is correct.
- Apply for an Advance Ruling from US Customs (CBP) if unsure. This locks in the classification and avoids surprise audits.
π£ Immediate Action:
π Contact a licensed customs broker + Provide SDS/TDS + Verify HS Code
π Avoid 35-41% tax shocks, ensure smooth clearance, protect your profit!
β¨ Professional clearance starts with accurate classification!
πΌ Every percentage point counts in global trade!
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) 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.