High Flow Filter Paper
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8421990140 | 35.0% | CN | US | Official Doc |
| 8421990180 | 35.0% | CN | US | Official Doc |
| 4823209000 | 35.0% | CN | US | Official Doc |
| 4823201000 | 35.0% | CN | US | Official Doc |
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AI Analysis
π High Flow Filter Paper: The Ultimate Flow-Through Solution
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: Do You Truly Understand "High Flow" Filter Paper?
High Flow Filter Paper is a specialized filtration media designed for rapid liquid or gas filtration in industrial, laboratory, and automotive applications. In international trade, it is not a single commodity but is classified based on its material composition and physical form.
Polyester Filter Paper (Synthetic): Made from PET (Polyethylene Terephthalate), known for chemical resistance and high tensile strength.
Paper Filter Paper (Cellulose/Quantitative): Made from pure cellulose, known for high precision and quantitative analysis suitability.
β οΈ Key Distinction Point:
- If the material is Polyester (Synthetic Fiber) βε½ε ₯ 8421.99 (Parts/Accessories of Filters).
- If the material is Paper (Cellulose-based) βε½ε ₯ 4823.20 (Filter Paper & Paperboard).
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Cross-Reference)
| HS Code | Product Description | Applicable Scenario | Material Basis |
|---|---|---|---|
8421.99.01.40 |
Polyester Filter Paper β Parts of filtration apparatus, made of polyester, used for filtration | Industrial chemical filtration, high-temperature environments | β Polyester (Synthetic) |
8421.99.01.80 |
Other Filter Media β Polyester filter paper, form: filter paper, used for filtration, classified as other filtering media | Specialized industrial filtering components, non-standard shapes | β Polyester (Synthetic) |
4823.20.90.00 |
Filter Paper & Paperboard β Quantitative filter paper, material: paper, other categories | Laboratory quantitative analysis, general industrial paper filtration | β Paper (Cellulose) |
4823.20.10.00 |
Filter Paper & Paperboard β Quantitative filter paper, material: paper, specific filter paper category | High-precision lab testing, gravimetric analysis | β Paper (Cellulose) |
π Important Reminder:
- "High Flow" is a functional description, not a material definition. Customs classifies based on material (θι ― vs. ηΊΈ).
- If the product is a roll or sheet of polyester filtering media, it may fall under 8421.99 (Parts of Machinery) rather than Chapter 48 (Paper), because it is primarily a component of a filtering machine.
- If the product is pure paper-based for quantitative analysis, it falls under 4823.20.
π° III. 2026 Latest Tariff Rate Detailed Explanation (Including Surcharges & Policy Add-ons)
β Applicable Country: USA (US)
β Origin: China (CN)
β Effective Date: From November 10, 2025 (and subsequent imports)
π― 1. 8421.99.01.40 & 8421.99.01.80 ββ Polyester Filter Paper (Synthetic Filter Media)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| Section 301 Surcharge | +25.0% (USITC Footnote 9903.88.01 / Section 301 List 4) |
| Section 122 Tariff | +10.0% (Specific to China-origin goods under certain trade measures) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | USITC:8421.99.01.40/80 β SECTION_301:9903.88.01 β SECTION_122:10% |
π Explanation:
- These polyester filter papers are considered industrial parts/components of filtering machinery.
- The 25% Section 301 tariff applies to most Chinese-origin industrial parts.
- The additional 10% (Section 122 or similar specific clause) pushes the total to 35%.
- High Cost Alert: This is a significant cost burden for synthetic filter media.
π― 2. 4823.20.10.00 & 4823.20.90.00 ββ Quantitative Filter Paper (Paper-based)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| Section 301 Surcharge | +25.0% (USITC Footnote 9903.88.01 / Section 301 List 4) |
| Section 122 Tariff | +10.0% (Specific to China-origin goods under certain trade measures) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | USITC:4823.20.10.00/90 β SECTION_301:9903.88.01 β SECTION_122:10% |
π Note:
- Even though filter paper is made of paper (Chapter 48), imports from China are still subject to Section 301 tariffs.
- The 10% additional clause also applies.
- Total Rate: 35% β Same as polyester, but the legal classification differs significantly.
- Misclassification Risk: If you declare polyester paper as "paper" to try to shift chapters, customs may reclassify and penalize. Both carry the same effective rate in this dataset, but the compliance evidence required differs.
π οΈ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance Guide)
β 1. Required Documentation Checklist (Non-negotiable)
| Document | Must Provide | Description |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must clearly state Material (Polyester vs. Paper), Pore Size, Flow Rate, and Chemical Resistance. |
| β Material Composition Proof | βοΈ | Certificate of Analysis (COA) confirming 100% Polyester or Pure Cellulose. Crucial for distinguishing between HS 8421 and 4823. |
| β Product Photos (Labeled) | βοΈ | Clear images showing the texture, packaging, and any labels indicating "Filter Paper" or "Filter Media". |
| β Commercial Invoice | βοΈ | Must explicitly describe the item as "High Flow Filter Paper" and specify the HS Code and Material. |
| β Packing List | βοΈ | Detail the quantity, weight, and dimensions. Avoid vague terms like "Mixed Filter Parts". |
| β Origin Certificate (CO) | βοΈ | Required to prove China origin (for tariff calculation) or to claim exemptions if applicable (rare for CN). |
β 2. Declaration Strategy (Key Mnemonics)
π₯ "Material First, Flow Second. Polyester in 8421, Paper in 4823. Don't Mix, or You'll Pay!"
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Polyester Filter Media | 8421.99.01.40 or 8421.99.01.80 + "Polyester Filter Paper" |
Declaring as "Paper" β Risk of misclassification penalty. |
| Cellulose Lab Filter Paper | 4823.20.10.00 or 4823.20.90.00 + "Quantitative Filter Paper" |
Declaring as "Polyester" β Wrong HS, wrong tax basis. |
| Rolls of Filter Media | Specify if it's a part of a machine (8421) or finished paper (4823). | Vague description "Filter Rolls" β Customs detention. |
| High Flow Feature | Include as a performance characteristic, not the primary classification. | Using "High Flow" as the sole HS description β Rejected. |
β 3. Special Case Handling
| Situation | Handling Advice |
|---|---|
| Mixed Shipments | If a shipment contains both polyester and paper filter media, declare separately. Do not combine under one HS code to save time; it leads to audits. |
| Lab vs. Industrial | Lab filter paper (Quantitative) is strictly 4823. Industrial filter paper (Polyester) is 8421. Clear distinction in product name is vital. |
| Customs Audit | Be prepared to provide samples if questioned. Customs may request a lab test to confirm material composition. |
| Section 122 Specifics | The 10% surcharge is often linked to specific trade remedy actions. Ensure your importer has the latest Section 122 exemption status or compliance proof. |
π V. Global Market Comparison for Filter Paper (2026 Update)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 8421.99 or 4823.20 |
35% (25% Sec 301 + 10% Sec 122) | No special certification, but accurate material declaration is critical. | High tariff makes cost optimization essential. |
| π¨π³ China | 8421.99 or 4823.20 |
5-10% (Import Duty) | CCC (if applicable for specific machinery parts) | Lower tariffs domestically. |
| πͺπΊ EU | 8421.99 or 4823.20 |
0-4% (Duty) | CE (if part of machinery), REACH compliance for chemicals. | No Section 301/122 equivalent, but REACH is strict. |
| π¦πΊ Australia | 8421.99 or 4823.20 |
5% | RCM (if electrical, but not applicable here). | Stable tariff regime. |
π Conclusion:
- USA is the most expensive market due to Section 301 + Section 122 tariffs, totaling 35%.
- Compliance is Key: Misclassifying polyester as paper (or vice versa) can lead to duties being reassessed, fines, and shipment delays.
- Cost Impact: For high-volume shipments, a 35% tariff significantly erodes margins. Consider supply chain diversification or pre-classification rulings.
π VI. Common Errors & Pitfall Guide (Blood-Teachings)
β Error 1: Declaring Polyester Filter Paper as "Paper" under 4823.
π Consequence: Customs reclassifies to 8421, assesses 35% instead of potentially lower (if exempt), and issues a penalty for misdeclaration.
π Reality: In this dataset, both are 35%, but the legal risk remains.
β Error 2: Omitting "Polyester" or "Cellulose" in the product description.
π Consequence: Customs cannot determine the correct HS code β Shipment held for inspection β Delayed delivery + Storage fees.
β Error 3: Assuming "High Flow" is a separate HS category.
π Consequence: There is no HS code for "High Flow". It is a functional attribute. Must be classified by material.
β Correct Approach:
"High Flow Polyester Filter Paper, 5 Micron Pore Size, Chemical Resistant, For Industrial Filtration Systems, Model HFP-500"
HS Code:8421.99.01.40
Tariff: 35%"Quantitative Filter Paper, Ashless, High Flow, For Laboratory Gravimetric Analysis, 11cm Diameter"
HS Code:4823.20.10.00
Tariff: 35%
π― VII. Conclusion: Professional Classification Saves Money & Time
π― Remember the Golden Rule:
πΉ "Material Determines Code. Polyester = 8421. Paper = 4823. Both at 35% from China. Accuracy Prevents Penalties!"
πΉ "HS Code is Destiny. Tax Rate is Fixed at 35%. One Mistake, Hundred Dollars Lost!"
π Pro Tip:
If you are importing large volumes, consider applying for an Import Alert Exemption or Advance Ruling with US Customs and Border Protection (CBP) to confirm the HS code and tariff liability before shipment. This provides legal certainty and avoids unexpected costs at the port.
π£ Immediate Action Required:
π Contact your customs broker with the Material Certificate and Product Specs.
π Verify HS Code:8421.99.01.40/80for Polyester,4823.20.10.00/90.00for Paper.
πΌ Your Profit Margin Depends on Accurate Classification!
β¨ Professional Clearance Starts with Precise Classification!
πΌ Every Percent Counts in Customs Duties!
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.