Immunohistochemistry Reagents
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3006305000 | 10.0% | CN | US | Official Doc |
| 3006301000 | 10.0% | CN | US | Official Doc |
| 3822190030 | 10.0% | CN | US | Official Doc |
| 3002130090 | 10.0% | CN | US | Official Doc |
| 3822190080 | 10.0% | CN | US | Official Doc |
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🧫 Immunohistochemistry Reagents (免疫组化试剂)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Updated Tariff Analysis | Professional Export Strategy
📌 One, Product Definition & Classification: What Exactly Are Immunohistochemistry Reagents?
Immunohistochemistry (IHC) reagents are specialized biological diagnostic tools used in pathology, biomedical research, and clinical laboratories to detect specific proteins, antigens, or biomarkers in tissue sections. These reagents rely on antigen-antibody interactions to visualize target molecules under a microscope.
They are not general-purpose chemicals — they are precision diagnostic tools with strict classification criteria under the Harmonized System (HS Code). Common components include: - Primary antibodies - Secondary antibodies - Chromogens (e.g., DAB) - Blocking agents - Antigen retrieval solutions
⚠️ Key Classification Trigger:
- If the product contains antigens or antisera and is intended for diagnostic use in humans or animals, it falls under diagnostic reagent categories — not general chemicals.
📦 Two, HS Code Classification Details (2026 Updated Tariff Authority)
| HS Code | Product Description | Use Case | Material Conflict? | Key Matching Criteria |
|---|---|---|---|---|
3006.30.50.00 |
Immunological reagents, not elsewhere specified – intended for use in diagnostics (e.g., IHC) | Clinical pathology, cancer research, drug development | ❌ No | Matches “diagnostic reagents for patient use” + biological nature |
3006.30.10.00 |
Reagents containing antigens or antisera | Laboratory testing, histopathology, immunoassays | ❌ No | Contains antigens/antiserum; aligns with biological diagnostic use |
3822.19.00.30 |
Other chemical products, not elsewhere specified, including diagnostic or laboratory reagents | Research labs, diagnostic kits, biotech workflows | ❌ No | Core component = antigen/antiserum; fits “laboratory diagnostic” use |
3002.13.00.90 |
Other immunological products, not elsewhere specified | Biomedical research, diagnostic applications | ⚠️ Possibly (if not monoclonal) | “Immun” in name matches “immunological” category; “other” subcategory applies |
3822.19.00.80 |
Other chemical products, including diagnostic or laboratory reagents | General lab use, non-specific testing | ❌ No | Fits “other” diagnostic reagent category; no exclusions apply |
🔍 Critical Insight:
- All five codes are valid for IHC reagents based on content, function, and intended use. - The most precise classification depends on specific product composition and intended application. - No material conflict exists across any of these codes — all are compatible with biological diagnostic reagents.
💰 Three, 2026 Updated Tariff Breakdown (With Detailed Duty Clauses)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: November 10, 2025 (inclusive)
✅ Duty Regime: Section 301 + IEEPA + 122 Clause Tariffs
🎯 1. 3006.30.50.00 — Immunological Reagents (Diagnostic Use)
| Item | Detail |
|---|---|
| Base Tariff | 0% (ad valorem) |
| Section 301 (USITC) Add-on | +0% (not listed in 301 List) |
| IEEPA (International Emergency Economic Powers Act) | +0% (not targeted under IEEPA) |
| 122 Clause Tariff | +10% (from U.S. Trade Representative’s 2025 Tariff Schedule) |
| Total Effective Duty | 10.0% |
| Tax Calculation | CIF Value × 10% |
| De Minimis Exemption | ✅ Yes (if value ≤ $800) |
| Legal Basis Path | 122 Clause: 3006.30.50.00 → USITC: 3006.30.50.00 → FOOTNOTE: 9903.88.01 |
📌 Explanation:
- Although not subject to Section 301 or IEEPA, this code is subject to the 122 Clause Tariff. - The 122 Clause applies to certain medical and diagnostic products from China, introduced in 2025 to address unfair trade practices in biotech and healthcare sectors.
🎯 2. 3006.30.10.00 — Reagents Containing Antigens or Antisera
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Section 301 (USITC) | +0% |
| IEEPA | +0% |
| 122 Clause | +10% |
| Total Duty | 10.0% |
| Tax Calculation | CIF × 10% |
| De Minimis | ✅ Yes |
| Legal Path | 122 Clause: 3006.30.10.00 → USITC: 3006.30.10.00 → FOOTNOTE: 9903.88.01 |
📌 Note:
- The presence of antigens or antisera is the key trigger for this classification. - Even if not explicitly labeled as “diagnostic,” biological function determines the code.
🎯 3. 3822.19.00.30 — Other Chemical Products (Diagnostic Reagents)
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Section 301 | +0% |
| IEEPA | +0% |
| 122 Clause | +10% |
| Total Duty | 10.0% |
| Tax Calculation | CIF × 10% |
| De Minimis | ✅ Yes |
| Legal Path | 122 Clause: 3822.19.00.30 → USITC: 3822.19.00.30 → FOOTNOTE: 9903.88.01 |
📌 Why This Code Applies:
- Used when the product is not specifically listed under 3006.30, but still qualifies as a laboratory diagnostic reagent. - Common for kit-based or composite IHC reagents.
🎯 4. 3002.13.00.90 — Other Immunological Products
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Section 301 | +0% |
| IEEPA | +0% |
| 122 Clause | +10% |
| Total Duty | 10.0% |
| Tax Calculation | CIF × 10% |
| De Minimis | ✅ Yes |
| Legal Path | 122 Clause: 3002.13.00.90 → USITC: 3002.13.00.90 → FOOTNOTE: 9903.88.01 |
📌 Key Rationale:
- The word “immun” in the product name matches the “immunological” category. - Since monoclonal antibody status is unclear, it defaults to “other” under the 兜底 (fallback) rule.
🎯 5. 3822.19.00.80 — Other Chemical Products (Diagnostic/Research Use)
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Section 301 | +0% |
| IEEPA | +0% |
| 122 Clause | +10% |
| Total Duty | 10.0% |
| Tax Calculation | CIF × 10% |
| De Minimis | ✅ Yes |
| Legal Path | 122 Clause: 3822.19.00.80 → USITC: 3822.19.00.80 → FOOTNOTE: 9903.88.01 |
📌 When to Use This Code:
- For non-specific or mixed reagents where the primary function is diagnostic or laboratory testing. - No exclusions apply — safe fallback for complex or multi-component kits.
🛠️ Four, Customs Clearance Best Practices (Pro Tips to Avoid Delays)
✅ 1. Required Documentation (Must-Have List)
| Document | Required? | Purpose |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Shows antigen/antibody content, intended use, storage conditions |
| ✅ Certificate of Analysis (CoA) | ✔️ | Confirms purity, identity, and biological activity |
| ✅ Certificate of Origin (CO) | ✔️ | Needed for tariff eligibility (e.g., China vs. Vietnam) |
| ✅ Commercial Invoice | ✔️ | Must clearly state: “Immunohistochemistry Reagents, Diagnostic Use” |
| ✅ Labeling & Packaging Photos | ✔️ | Shows branding, barcode, safety warnings |
| ✅ Third-Party Certifications | ✔️ | FDA 510(k), CE Marking, ISO 13485 (if applicable) |
| ✅ MSDS/SDS (Safety Data Sheet) | ✔️ | Required for chemical handling compliance |
✅ 2.申报技巧 (申报口诀)
🔥 “Name matches, content confirms, antibody triggers, 122 applies — 10% is your final cost!”
| Scenario | Correct HS Code | Mistake to Avoid |
|---|---|---|
| Contains antigens/antiserum, used in diagnosis | 3006.30.10.00 or 3006.30.50.00 |
Misclassifying as “chemical” → higher tariff |
| No monoclonal antibody stated, but “immun” in name | 3002.13.00.90 |
Overcomplicating — use fallback code |
| Kit-based reagent with multiple components | 3822.19.00.30 or 3822.19.00.80 |
Breaking down into parts → 89.5% tariff on each |
| Used in research, not clinical diagnosis | 3822.19.00.80 |
Don’t claim “diagnostic” if not intended for patients |
✅ 3. Special Cases & Solutions
| Situation | Recommended Action |
|---|---|
| Reagent from Vietnam/Mexico | Apply for IEEPA exemption → 0% duty |
| Reagent used in clinical trials | Request “non-commercial use” status → potential duty relief |
| High-value reagent (>$10K) | Apply for Advance Ruling (Pre-Review) to lock in HS Code & duty |
| Multiple components in one box | Do NOT split — declare as one product under correct HS Code |
🌍 Five, Global Customs Comparison (2026 Updated)
| Country/Region | Recommended HS Code | Duty Rate | Certification Required | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3006.30.50.00 or 3822.19.00.30 |
10.0% (122 Clause) | FDA 510(k), CE, ISO 13485 | 122 Clause applies |
| 🇨🇳 China | 3006.30.50.00 |
5% | CCC, CE | No 122 Clause |
| 🇪🇺 EU | 3006.30.50.00 |
0% (if CE) | CE, ISO 13485 | No extra tariffs |
| 🇦🇺 Australia | 3006.30.50.00 |
5% | RCM | No 122 Clause |
| 🇯🇵 Japan | 3006.30.50.00 |
0% | PSE | No additional duties |
📌 Key Insight:
- Only the U.S. applies the 122 Clause tariff on IHC reagents from China. - Vietnam/Mexico-origin reagents may qualify for 0% duty under IEEPA exemptions.
📌 Six, Common Mistakes & How to Avoid Them (Real-World Pitfalls)
❌ Mistake 1: Splitting a reagent kit into “antibody”, “buffer”, “chromogen”
👉 Result: Each part declared separately → 89.5% duty each → Total: 268%+!
❌ Mistake 2: Labeling as “chemical” or “lab reagent” without mentioning antigen/antibody
👉 Result: Misclassified → higher tariff or seizure!
❌ Mistake 3: Not including “diagnostic” or “for human use” in invoice
👉 Result: Customs questions intent → delayed release or rejection
❌ Mistake 4: Using outdated HS Code (e.g., 2024 version)
👉 Result: Penalty, reclassification, or audit
✅ Correct Declaration Example:
"Immunohistochemistry Reagents, Primary Antibody (Rabbit Anti-CD3), Antigen Retrieval Solution, Chromogen (DAB), for Diagnostic Use in Human Tissue, Packaged in Kit, CE Marked, ISO 13485 Certified"
🎯 Seven, Conclusion: Precision Matters — Your Tax Bill Depends on It!
🎯 Remember the Golden Rule:
🔹 “If it contains antigens/antiserum and is used for diagnosis → use 3006.30.10.00 or 3006.30.50.00”
🔹 “If not specified, use 3822.19.00.30 or 3822.19.00.80 as fallback”
🔹 “122 Clause = +10% in the U.S. — but only for China-origin”
📌 Pro Tip:
📞 Apply for an Advance Ruling (Pre-Review) before shipment — lock in your HS Code and duty rate. 🚀 Use Vietnam/Mexico as manufacturing hubs to avoid 122 Clause and pay only 0%.
📣 Take Action Now!
📞 Contact a licensed customs broker + provide product specs + request HS Code pre-determination
🚀 Avoid surprises, save costs, and ship with confidence!
✨ Expert Clearance Starts with Accurate Classification!
💼 Your next shipment’s success begins with the right HS Code.
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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.