Water based Phosphate Binder
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3506990000 | 37.1% | CN | US | Official Doc |
| 3824999361 | 40.0% | CN | US | Official Doc |
| 2919905010 | 38.7% | CN | US | Official Doc |
| 2919905050 | 38.7% | CN | US | Official Doc |
| 3506915000 | 37.1% | CN | US | Official Doc |
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π§ͺ Water-Based Phosphate Binder (Aqueous Phosphate Adhesive)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy
π I. Product Definition & Classification: What is a "Water-Based Phosphate Binder"?
A Water-Based Phosphate Binder is a chemical adhesive or binding agent where phosphate esters or derivatives serve as the primary active component, dissolved or suspended in water. It is commonly used in foundry (sand casting), refractory materials, ceramic manufacturing, or specialized industrial coatings.
In international trade, its classification depends on its primary function: 1. As an Adhesive: If marketed primarily for bonding materials together (e.g., sand-to-sand in molds). 2. As a Chemical Reagent/Preparation: If marketed as a raw chemical mixture containing phosphorus atoms, not solely defined by its adhesive property. 3. As a Chemical Derivative: If defined by its specific organic/inorganic phosphate ester structure (e.g., plasticizers or specific chemical intermediates).
β οΈ Key Distinction:
- If the productβs main purpose is to bind substances together β It is likely classified under Heading 3506 (Adhesives).
- If the productβs main characteristic is its chemical composition (phosphorus content) rather than just adhesion β It may fall under Heading 3824 (Miscellaneous Chemical Products) or Heading 2919 (Phosphorus organic-inorganic compounds).
π¦ II. HS Code Classification Details (Based on Provided Data)
Below are the five possible HS Code classifications for Water-Based Phosphate Binder, along with the rationale for each, based on the provided data.
| HS Code | Product Description & Rationale | Tax Category |
|---|---|---|
3506.99.00.00 |
Classified as Prepared Adhesives. Rationale: The product is explicitly described as a "phosphate ester binder" used for binding. Under Chapter 35, prepared adhesives that do not fall into other specific categories are classified here. It emphasizes the functional use (adhesion). |
Adhesive Category |
3824.99.93.61 |
Classified as Chemical Preparations Containing Phosphorus. Rationale: Classified as a chemical product/preparation containing phosphorus atoms. It fits the description of "other chemical preparations" where the chemical identity (phosphate) is dominant over the general adhesive label. |
Chemical Preparation Category |
2919.90.50.10 |
Classified as Phosphate Esters / Derivatives. Rationale: Classified as a derivative of phosphoric acid (phosphate ester). It may be inferred as a plasticizer or a specific chemical intermediate with specialized use, rather than a general-purpose glue. |
Chemical Derivative Category |
2919.90.50.50 |
Classified as Other Phosphorus Organic-Inorganic Compounds. Rationale: Falls under the "catch-all" or residual category for phosphate chemical products not specifically listed elsewhere in Heading 2919. It highlights the chemical composition (phosphate nature). |
Chemical Derivative Category |
3506.91.50.00 |
Classified as Based on Polymers. Rationale: Classified as a binder based on polymer title items. If the phosphate ester is modified with or based on polymeric materials, it may be grouped under polymer-based adhesives. |
Polymer-Based Adhesive |
π Critical Note:
- The difference between3506(Adhesives) and2919/3824(Chemicals) often hinges on labeling, marketing, and technical data sheets.
- If the product is sold as "Glue" or "Bonding Agent,"3506is more likely.
- If it is sold as a "Chemical Reagent" or "Raw Material" for mixing into other formulations,2919or3824may apply.
- Do not misdeclare: Incorrect classification can lead to significant duty differences (see below).
π° III. 2026 Tariff Rate Breakdown (Including Additional Duties & Policy Surcharges)
β Applicable Country: USA (US)
β Country of Origin: China (CN)
β Effective Date: Current rates apply (2025-2026)
All the following HS Codes are subject to significant US tariffs due to their Chinese origin. The total tax rate includes Base Tariff, Section 301 Tariff (25%), and Section 122/IEEPA Tariff (10%).
π― 1. 3506.99.00.00 β Prepared Adhesives (Based on Function)
| Item | Content |
|---|---|
| Base Tariff | 2.1% |
| Section 301 Tariff | +25.0% (25% surcharge on Chinese goods) |
| Section 122/IEEPA Tariff | +10.0% (Specific trade remedy tariff) |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value Γ 37.1% |
| De Minimis Exemption | β Not Eligible (Section 301 and IEEPA tariffs generally apply regardless of value for Chinese origin) |
| Legal Basis | HTSUS 3506.99.00.00 + USITC Footnotes (301 & 122) |
π Explanation:
- This classification assumes the product is primarily an adhesive.
- The 25% Section 301 tariff is the most significant component, added by the US Trade Representative.
- The 10% Section 122 tariff is an additional surcharge for certain chemical/adhesive products from China.
π― 2. 3824.99.93.61 β Chemical Preparations (Based on Phosphorus Content)
| Item | Content |
|---|---|
| Base Tariff | 5.0% |
| Section 301 Tariff | +25.0% |
| Section 122/IEEPA Tariff | +10.0% |
| Total Tax Rate | 40.0% |
| Tax Calculation | CIF Value Γ 40.0% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis | HTSUS 3824.99.93.61 + USITC Footnotes |
π Explanation:
- This classification has a higher base rate (5%) than the adhesive category.
- It is classified as a chemical preparation containing phosphorus.
- Total tax is 40.0%, which is 2.9% higher than the adhesive classification (3506.99.00.00).
π― 3. 2919.90.50.10 β Phosphate Esters / Derivatives
| Item | Content |
|---|---|
| Base Tariff | 3.7% |
| Section 301 Tariff | +25.0% |
| Section 122/IEEPA Tariff | +10.0% |
| Total Tax Rate | 38.7% |
| Tax Calculation | CIF Value Γ 38.7% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis | HTSUS 2919.90.50.10 + USITC Footnotes |
π Explanation:
- Classified as a phosphate ester derivative.
- The base tariff is 3.7%, leading to a total of 38.7%.
- This is 1.6% higher than the adhesive classification (3506.99.00.00) but 1.3% lower than the chemical preparation (3824.99.93.61).
π― 4. 2919.90.50.50 β Other Phosphorus Compounds (Catch-All)
| Item | Content |
|---|---|
| Base Tariff | 3.7% |
| Section 301 Tariff | +25.0% |
| Section 122/IEEPA Tariff | +10.0% |
| Total Tax Rate | 38.7% |
| Tax Calculation | CIF Value Γ 38.7% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis | HTSUS 2919.90.50.50 + USITC Footnotes |
π Explanation:
- This is the residual category for phosphate chemicals not listed elsewhere in Heading 2919.
- Tax rate is identical to2919.90.50.10(38.7%).
- Use this only if the product does not fit the specific "plasticizer/specialized use" description of2919.90.50.10.
π― 5. 3506.91.50.00 β Polymer-Based Adhesives
| Item | Content |
|---|---|
| Base Tariff | 2.1% |
| Section 301 Tariff | +25.0% |
| Section 122/IEEPA Tariff | +10.0% |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value Γ 37.1% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis | HTSUS 3506.91.50.00 + USITC Footnotes |
π Explanation:
- Classified as an adhesive based on polymers.
- If the phosphate binder is chemically linked to or dissolved in a polymer base, this code may be more accurate.
- Tax rate is 37.1%, same as general prepared adhesives (3506.99.00.00).
π οΈ IV. Customs Clearance Practical Advice (Pitfall Avoidance Guide)
β 1. Preparation Checklist (Essential Documents)
| Document | Required? | Description |
|---|---|---|
| β Technical Data Sheet (TDS) | βοΈ | Must specify: Chemical composition, water content, phosphate ester type, and primary function (e.g., "binding agent for sand molds"). |
| β Safety Data Sheet (SDS) | βοΈ | Required for hazardous materials. Check if classified as dangerous goods for shipping. |
| β Product Photo & Label | βοΈ | Clear images of packaging, including ingredient lists and warnings. |
| β Commercial Invoice | βοΈ | Must accurately describe the product. Use terms like "Water-Based Phosphate Adhesive" if declaring under 3506. |
| β Certificate of Origin (CO) | βοΈ | To confirm Chinese origin and apply correct tariff rates. |
| β Formulation Disclosure | βοΈ | For 2919/3824 codes, customs may require detailed chemical structure confirmation. |
β 2. Declaration Strategy (Key Tips)
π₯ βFunction Determines Code, Chemistry Determines Riskβ
| Scenario | Recommended HS Code | Reason |
|---|---|---|
| Product is sold as "Glue" or "Adhesive" for bonding materials | 3506.99.00.00 or 3506.91.50.00 |
Primary function is adhesion; lower base tariff (2.1%). |
| Product is sold as "Chemical Reagent" or "Raw Material" | 3824.99.93.61 |
Classified as chemical preparation; higher base tariff (5.0%). |
| Product is a specific Phosphate Ester (e.g., for plasticizing) | 2919.90.50.10 |
Specific chemical derivative; base tariff 3.7%. |
| Product is a general Phosphate Mix not for specific use | 2919.90.50.50 |
Catch-all for phosphorus compounds; base tariff 3.7%. |
β οΈ Warning:
- Do not mix adhesive claims with chemical-only descriptions in the same shipment. Consistency is key.
- If the product contains more than 50% water, ensure the declaration reflects the aqueous nature, but note that tariffs are based on the dry weight/chemical value for some classifications.
β 3. Special Circumstances
| Situation | Handling Advice |
|---|---|
| OEM/Private Label | Provide customer specification sheets to prove intended use (adhesive vs. chemical). |
| High Water Content | Declare net weight accurately. Some duties are calculated on net weight, others on chemical content. |
| Mixed Shipments | If shipping both adhesives and pure chemicals, separate declarations are required to avoid misclassification penalties. |
| Anti-Dumping/Countervailing Duties | Check if phosphate esters from China are subject to additional anti-dumping duties (not included in the provided data, but critical to verify). |
π V. Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Notes |
|---|---|---|---|
| πΊπΈ USA | 3506.99.00.00 |
37.1% | High tariffs due to Section 301 & 122. |
| π¨π³ China | 3506.99.00.00 |
~5-13% | Import duty may vary; check current Chinese tariff schedule. |
| πͺπΊ EU | 3506.91 or 3824 |
0-6.5% | Generally lower tariffs; no Section 301 equivalent. |
| π¬π§ UK | 3506.99 |
0-6.5% | Post-Brexit tariffs apply; check UK Global Tariff. |
| π¨π¦ Canada | 3506.99 |
0-5% | Less punitive than US; no Section 301. |
π Conclusion:
- The USA is the most challenging market due to the 37-40% total tariff.
- Consider supply chain diversification (e.g., sourcing from Vietnam or India) if feasible to mitigate US tariffs.
- Pre-clearance rulings from US Customs (CBP) are highly recommended for large shipments.
π VI. Common Errors & Pitfalls (Lessons Learned)
β Error 1: Declaring as "Chemical" when marketed as "Adhesive"
π Consequence: CBP may reclassify to 3506, but if documentation is inconsistent, penalties and delays occur.
β Error 2: Ignoring Section 122/IEEPA 10% Surcharges
π Consequence: Underpayment of duties. Total tax is 37-40%, not just 25-27%.
β Error 3: Misdeclaring Water Content
π Consequence: Duties calculated on gross weight instead of net chemical weight β Overpayment or Underpayment.
β Error 4: Using Generic "Glue" Description
π Consequence: Customs may classify under the highest-duty chemical category if composition is unclear.
β Correct Practice:
"Water-Based Phosphate Ester Adhesive, for Foundry Sand Bonding, Non-Hazardous, Aqueous Solution, HS Code 3506.99.00.00"
π― VII. Conclusion: Professional Declaration, Cost Optimization
π― Remember the Key:
πΉ "Adhesive Function β 3506 (37.1%)
πΉ Chemical Composition β 2919/3824 (38.7-40.0%)
πΉ Always verify Section 301 & 122 applicability!**
π Pro Tip:
- If your product is not primarily an adhesive but a chemical intermediate, explore 2919 codes for potential slight base rate differences, but be prepared for rigorous scrutiny.
- Apply for a Binding Ruling with US Customs and Border Protection (CBP) before shipping large volumes to lock in the correct HS Code and tariff rate.
π£ Immediate Action:
π Consult with a licensed customs broker.
π Provide TDS and SDS for accurate classification.
π Ensure smooth clearance, avoid penalties, and maximize profitability!
β¨ Professional Customs Clearance Starts with Accurate Classification!
πΌ Every percentage point of tariff matters in todayβs trade landscape!
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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.