Halogen Free Soldering Flux
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๐งช Halogen-Free Soldering Flux (ๆ ๅค็ด ๅฉ็ๅ)
๐ HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Full Analysis | Professional-Grade Clearance Strategy
๐ I. Product Definition & Classification: Do You Really Understand โHalogen-Free Fluxโ?
Halogen-free soldering flux is a critical chemical auxiliary material used in electronics manufacturing (SMT/DIP processes) to remove oxide layers from metal surfaces and promote wetting during soldering. In international trade, it is strictly distinguished from ordinary flux by its halogen content (Chlorine, Bromine, etc.).
Key Distinction: * Halogen-Free Flux (HF Flux): Halogen content (specifically Chlorine and Bromine) is below strict thresholds (typically Cl < 900ppm, Br < 900ppm, Total Halogens < 1500ppm). Used for high-reliability electronics, medical devices, and eco-compliant products. * Standard/Activated Flux: May contain higher halogen levels or rosin-based activators not meeting "halogen-free" standards.
โ ๏ธ Critical Classification Point:
- If the product is a preparation for soldering/fluxing, it generally falls under Chapter 38 (Miscellaneous Chemical Products).
- HS Code 3810 is the primary category for "Preparations for soldering/brazing; fluxes and other auxiliary preparations..."
๐ฆ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Halogen Content |
|---|---|---|---|
3810.10.00.00 |
Preparations for soldering/brazing (including fluxes) | Halogen-free fluxes, rosin-based or synthetic, for electronics | โ Low (<1500ppm total) |
3810.10.00.00 |
Preparations for soldering/brazing (including fluxes) | Standard activated fluxes (if not classified elsewhere) | โ May be high |
2834.29.00.00 |
Other salts of inorganic acids or peroxoacids | Incorrectly classified for pure chemical salts used as flux components | N/A |
3405.90.00.00 |
Other polishes... | Incorrectly classified - Flux is not a polish or cleaning compound for general use | N/A |
๐ Important Reminder:
- Halogen-free flux is unequivocally classified under3810.10.00.00as "Preparations for soldering/brazing; fluxes."
- Do not classify under cleaning agents (Chapter 34) or simple chemical salts (Chapter 28) if it is a formulated mixture designed for soldering.
- The "Halogen-Free" status is a quality specification, not a separate HS code. It affects tariff rates (via trade policies like US Section 301 or IEEPA) but not the HS code itself.
๐ฐ III. 2026 Latest Tariff Rate Details (Including Surcharges, Policy Add-ons)
โ Applicable Country: United States (US)
โ Origin: China (CN)
โ Effective Time: From November 10, 2025 (including subsequent imports)
๐ฏ 1. 3810.10.00.00 โโ Preparations for Soldering/Brazing (Including Fluxes)
| Item | Content |
|---|---|
| Base Tariff Rate | 5.7% (ad valorem, from USHTS) |
| USITC Surcharge | +25% (from USITC Footnote 9903.88.01, Section 301) |
| IEEPA Surcharge | +10% (ๅฏนๅๅ ๅพๅ ณ็จ, IEEPA, effective Nov 10, 2025) |
| Total Tariff Rate | 40.7% |
| Tax Calculation | CIF Value ร 40.7% |
| De Minimis Eligibility | โ Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 โ IEEPA:9903.01.24 โ USITC:3810.10.00.00 โ FOOTNOTE:9903.88.01 |
๐ Explanation:
- "USITC Surcharge 25%": From the US Trade Act Section 301 list, targeting Chinese chemical preparations.
- "IEEPA 10%": Additional tariff under the International Emergency Economic Powers Act for Chinese goods, effective from late 2025.
- Total 40.7%: This is a high tariff burden. Fluxes are critical consumables, so this cost significantly impacts manufacturing margins.
๐ ๏ธ IV. Customs Clearance Practical Advice (ๅฎๆ้ฟๅๆๅ)
โ 1. Required Documentation Checklist (No Missing Items)
| Material | Must Provide | Description |
|---|---|---|
| โ Technical Data Sheet (TDS) | โ๏ธ | Must specify halogen content (Cl, Br ppm levels) |
| โ Safety Data Sheet (SDS) | โ๏ธ | Classify under GHS; note if flammable or corrosive |
| โ Composition List | โ๏ธ | Full percentage composition of ingredients (critical for chemical classification) |
| โ Halogen-Free Certificate | โ๏ธ | Third-party test report (e.g., SGS, Intertek) proving Cl < 900ppm, Br < 900ppm |
| โ Commercial Invoice | โ๏ธ | Clearly state "Halogen-Free Soldering Flux" and HS Code 3810.10.00.00 |
| โ Packing List | โ๏ธ | Net/gross weight, package type (drums, bottles, etc.) |
| โ UN38.3/MSDS for Shipping | โ๏ธ | Required for air/sea transport if flammable or hazardous |
โ 2. Declaration Tips (Key Mnemonics)
๐ฅ โFlux is 3810, Halogen-Free is a Spec, Not a Code. Declare Mix, Not Just โChemicalโ!โ
| Situation | Correct Declaration | Wrong Practice |
|---|---|---|
| Halogen-free flux for PCB assembly | 3810.10.00.00 "Preparations for soldering" |
Classify as "Chemical Auxiliary" (vague) |
| Flux with high chlorine content | 3810.10.00.00 (Same HS, different spec) |
Claim "Halogen-Free" falsely โ Fine |
| Pure Rosin (not formulated) | 1302.19.30 (Resins) |
Incorrectly classify as flux |
| Flux in small retail packs | 3810.10.00.00 |
Classify as "Household Cleaning" |
โ 3. Special Handling Cases
| Situation | Handling Advice |
|---|---|
| Custom Formulation | Provide full ingredient list. Customs may verify if itโs truly a "preparation" vs. pure chemical. |
| Water-Based vs. Solvent-Based | Solvent-based may have higher hazardous material (HazMat) requirements for shipping. |
| Halogen-Free Claim | Must have valid test report. Customs may request re-test at port. Falsification leads to severe penalties. |
| Samples | Even samples of flux are subject to the same 40.7% tariff if commercial value is declared. |
๐ V. Global Main Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification Requirements | Notes |
|---|---|---|---|---|
| ๐บ๐ธ USA | 3810.10.00.00 |
40.7% (China) | None specific, but SDS required | High tariff burden |
| ๐จ๐ณ China | 3810.10.00.00 |
5.7% | CCC (if applicable, usually not for flux) | No surcharges |
| ๐ช๐บ EU | 3810.10.00.00 |
6.5% (MFN) | REACH Registration, CLP Labeling | Halogen-free is a market preference, not tariff differentiator |
| ๐ฏ๐ต Japan | 3810.10.00.00 |
3.5% (MFN) | JIS Standards, PSE (if electric parts, but flux is not) | Low tariff |
| ๐ฎ๐ณ India | 3810.10.00.00 |
7.5% + Social Welfare Surcharge | BIS Certification (may apply) | Check for anti-dumping if any |
๐ Conclusion:
- USA has the highest effective tariff (40.7%) for Chinese-origin halogen-free flux due to Section 301 and IEEPA.
- EU and Japan have moderate base rates but require strict environmental compliance (REACH/JIS).
- Halogen-free is a quality standard, not a tariff preference. It does not lower the HS code rate but may be required by buyers.
๐ VI. Common Mistakes & Pitfalls (Lessons Learned)
โ Mistake 1: Classifying flux as "Cleaning Agent" (Chapter 34)
๐ Consequence: Wrong HS code โ Seizure, fines, and incorrect tax assessment.
โ Mistake 2: Claiming "Halogen-Free" without test reports
๐ Consequence: Customs rejection, mandatory re-testing, delay, or penalty for false declaration.
โ Mistake 3: Ignoring SDS/HazMat requirements for shipping
๐ Consequence: Carrier refusal to transport, especially for solvent-based fluxes (flammable).
โ Mistake 4: Splitting declaration (Flux + Solder Paste)
๐ Consequence: Must declare separately. Solder paste is 8545.11.00.00, Flux is 3810.10.00.00. Mixed declaration causes confusion.
โ Correct Practice:
"Halogen-Free Soldering Flux, Water-Based, Cl < 500ppm, Br < 500ppm, for SMT Process, HS Code 3810.10.00.00, SDS Provided"
๐ฏ VII. Conclusion: Precise Classification, Cost Control, Compliance!
๐ฏ Remember the Mnemonic:
๐น "Flux is 3810, Halogen-Free is a Spec. US Tariff 40.7%, Donโt Be a Specter!"
๐น "SDS & TDS are your Best Friends, Without Them, Youโll Be Rejected!"
๐ Pro Tip:
If your halogen-free flux is originating from Vietnam, Thailand, or Malaysia, you may qualify for lower or zero IEEPA/301 surcharges under certain trade agreements or rules of origin.
Recommend Advance Ruling from CBP for complex formulations to avoid disputes.
๐ฃ Immediate Action:
๐ Contact professional customs broker + Provide TDS/SDS + Apply for HS Code Advance Ruling
๐ Ensure your flux, cleared smoothly, compliantly, and cost-effectively!
โจ Professional Clearance Starts with Precise Classification!
๐ผ Every percentage point in tariff matters!
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) 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.