Enzyme precursor extracts
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3507902000 | 35.0% | CN | US | Official Doc |
| 3507907000 | 35.0% | CN | US | Official Doc |
| 1302199140 | 17.5% | CN | US | Official Doc |
| 1302194140 | 18.5% | CN | US | Official Doc |
| 2936900110 | 10.0% | CN | US | Official Doc |
AI Analysis
𧬠Enzyme Precursor Extracts
π HS Code Classification & Tariff Guide | 2026 Updated | Strategic Customs Clearance Advice
π One Product, Multiple Classifications β Why? How to Choose?
Enzyme precursor extracts are biochemical substances derived from natural sources (often plants or microbial fermentation), used as building blocks for enzyme production in pharmaceuticals, biotechnology, food processing, and industrial applications. Due to their dual nature β both biological origin and chemical function β they can fall under multiple HS codes, depending on material composition, intended use, and processing method.
β οΈ Critical Insight:
The correct HS code depends not just on the name of the product, but on scientific classification, processing stage, and end-use. Misclassification leads to severe penalties, delays, or seizure.
π¦ 2026 HS Code Classification Matrix (Based on Official Data)
| HS Code | Product Description | Classification Logic | Tax Rate | Tax Breakdown |
|---|---|---|---|---|
3507.90.20.00 |
Enzyme precursor extracts classified as modified enzymes, with consistent material and function | Treated as processed biocatalysts; falls under "modified enzymes" in the chemical category | 35.0% | Base: 0%, Additional Duty: 25%, Section 122 Tariff: 10% |
3507.90.70.00 |
Enzyme precursor extracts in other categories of modified enzymes; no conflict in material or use | General category for non-specific modified enzymes; not covered by more specific subheadings | 35.0% | Base: 0%, Additional Duty: 25%, Section 122 Tariff: 10% |
1302.19.91.40 |
Enzyme precursor extracts matching plant sap and extractives; biologically derived from plants | Classified under plant-derived biological materials, based on chemical origin and extraction method | 17.5% | Base: 0%, Additional Duty: 7.5%, Section 122 Tariff: 10% |
1302.19.41.40 |
Enzyme precursor extracts meeting plant sap and extractives criteria; falls under βotherβ subcategory | Specific to non-essential plant extracts; includes complex natural mixtures | 18.5% | Base: 1.0%, Additional Duty: 7.5%, Section 122 Tariff: 10% |
2936.90.01.10 |
Enzyme precursor extracts with vitamin precursor function; used in biosynthesis pathways | Classified as precursor substances for vitamins, aligning with biochemical role | 10.0% | Base: 0%, Additional Duty: 0%, Section 122 Tariff: 10% |
π Why So Many Codes?
Because enzyme precursors are not a single chemical entity β they are complex mixtures that can be: - Chemically modified β fall under 3507.90 - Extracted from plants β fall under 1302.19 - Functionally similar to vitamin precursors β fall under 2936.90
π° 2026 Tariff Breakdown: What Do the Numbers Mean?
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: November 10, 2025 (with retroactive enforcement)
π― 1. 3507.90.20.00 & 3507.90.70.00 β Modified Enzymes (High-Risk Category)
| Item | Detail |
|---|---|
| Base Tariff | 0% (ad valorem) |
| Additional Duty (USITC 301) | +25% (from Section 301 of U.S. Trade Act) |
| Section 122 Tariff (IEEPA) | +10% (under International Emergency Economic Powers Act) |
| Total Effective Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not applicable (denied for China-origin goods) |
| Legal Pathway | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3507.90.20.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- The 25% USITC duty is from Section 301 β targeting Chinese goods deemed to have unfair trade practices. - The 10% IEEPA duty is for national security concerns, applied to all goods from China under emergency powers. - Total: 35% β one of the highest tariffs for biochemicals.
π― 2. 1302.19.91.40 β Plant Sap & Extracts (Lower Risk)
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Additional Duty (USITC) | +7.5% |
| Section 122 Tariff (IEEPA) | +10% |
| Total Effective Rate | 17.5% |
| Tax Calculation | CIF Γ 17.5% |
| De Minimis Exemption | β Not applicable |
| Legal Pathway | IEEPA:9903.01.24 β USITC:1302.19.91.40 β FOOTNOTE:9903.88.01 |
π Note:
- This code applies only if the extract is clearly derived from plant sources and not chemically modified. - Evidence required: Botanical source, extraction method (e.g., solvent extraction, distillation).
π― 3. 1302.19.41.40 β Other Plant Extracts (Slightly Higher Base)
| Item | Detail |
|---|---|
| Base Tariff | 1.0% |
| Additional Duty (USITC) | +7.5% |
| Section 122 Tariff (IEEPA) | +10% |
| Total Effective Rate | 18.5% |
| Tax Calculation | CIF Γ 18.5% |
| De Minimis Exemption | β Not applicable |
| Legal Pathway | IEEPA:9903.01.24 β USITC:1302.19.41.40 β FOOTNOTE:9903.88.01 |
π Key Difference:
- The 1% base tariff is due to specific subcategory classification. - Still subject to 25%+10% in additional duties β high cost.
π― 4. 2936.90.01.10 β Vitamin Precursor Function (Lowest Tariff)
| Item | Detail |
|---|---|
| Base Tariff | 0% |
| Additional Duty (USITC) | 0% |
| Section 122 Tariff (IEEPA) | +10% |
| Total Effective Rate | 10.0% |
| Tax Calculation | CIF Γ 10% |
| De Minimis Exemption | β Not applicable |
| Legal Pathway | IEEPA:9903.01.25 β 2936.90.01.10 β FOOTNOTE:9903.88.01 |
π Best Option?
- Only if the product is functionally proven to be a vitamin precursor (e.g., riboflavin, niacin, folic acid precursors). - Requires scientific documentation, biochemical pathway analysis, MSDS, and third-party testing.
π οΈ π¨ Proactive Customs Clearance Strategy (2026 Edition)
β 1. Essential Documentation (MUST-HAVE)
| Document | Why It Matters |
|---|---|
| β Technical Data Sheet (TDS) | Proves material composition, extraction method, and biological function |
| β Certificate of Analysis (CoA) | Shows purity, active ingredient concentration, and identity |
| β Chemical Structure & Pathway Diagram | Supports functional classification (e.g., vitamin precursor) |
| β Plant Source & Extraction Method | Critical for 1302.19 codes |
| β Commercial Invoice | Must state: βEnzyme precursor extract, for biotech useβ |
| β Certificate of Origin (CO) | Required for tariff eligibility; avoid China if possible |
| β Third-Party Lab Report | Validates function (e.g., βacts as vitamin B2 precursorβ) |
β 2.η³ζ₯ζε·§οΌη³ζ₯ε£θ―οΌ β βFunction First, Form Second, Origin Lastβ
π₯ Golden Rule:
βIf it acts like a vitamin precursor, classify it as one β even if it looks like an enzyme.β
| Scenario | Correct HS Code | Why |
|---|---|---|
| Extract from Aloe vera with enzyme-activating properties | 1302.19.91.40 |
Plant origin, not chemically modified |
| Chemically modified extract used in enzyme production | 3507.90.20.00 |
Treated as modified enzyme |
| Extract that converts to riboflavin in vivo | 2936.90.01.10 |
Functional identity trumps form |
| Mixed extract with no clear function | 3507.90.70.00 |
Default βother modified enzymeβ |
β 3. Risk Mitigation & Avoidance
| Risk | Solution |
|---|---|
| β Misclassification β 35% tax instead of 10% | Get pre-ruling (Advance Ruling) from U.S. CBP |
β No proof of function β denied 2936.90.01.10 |
Submit biochemical pathway report |
| β China origin β no de minimis | Shift production to Vietnam, Mexico, India, or Thailand |
| β No CoA or TDS β delay or rejection | Always include lab-verified documentation |
π Global Tariff Comparison (2026)
| Country | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 2936.90.01.10 (if valid) |
10% | None (but proof required) | High risk if origin is China |
| π¨π³ China | 3507.90.20.00 |
5% | CCC | No extra duties |
| πͺπΊ EU | 3507.90.20.00 |
0% (if CE) | CE, REACH | No IEEPA/301 duties |
| π¦πΊ Australia | 3507.90.20.00 |
5% | RCM | No 301/IEEPA |
| π―π΅ Japan | 3507.90.20.00 |
0% | PSE | No additional tariffs |
π Insight:
- The U.S. is the only market with 25%+10% extra duties. - China-origin goods face the highest risk β consider relocation or rebranding.
π¨ Common Pitfalls & Real-World Mistakes
β Mistake 1: Classifying a plant extract as 3507.90.20.00 just because it's used in enzyme production
π Result: Pay 35% instead of 17.5% β extra $15k on $100k shipment
β Mistake 2: Not providing proof of vitamin precursor function
π Result: Denied 2936.90.01.10 β forced into 35% tier
β Mistake 3: Using βenzyme extractβ as the product name without context
π Result: Customs assumes it's a modified enzyme β 35% tax
β Correct Labeling Example:
βAloe-derived enzyme precursor extract, functioning as riboflavin precursor, 98% purity, for biotech applications, batch #XYZ, CoA attachedβ
π― Final Verdict: Choose Wisely, Pay Less
πΉ Best Tax Rate:
2936.90.01.10β 10% (if proven)
πΉ Worst Case:3507.90.20.00β 35%
πΉ Middle Ground:1302.19.91.40β 17.5%π Pro Tip:
Apply for a pre-ruling (Advance Ruling) with U.S. CBP β it locks in the HS code and tariff before shipment.
π£ Immediate Action Plan
π Contact a U.S. Customs Broker + Submit Product Samples + Request Pre-Ruling
π Shift origin to non-China country if possible
π Use lab reports to prove function, not just name
β¨ Your Success Starts with One Decision:
Choose the Right HS Code β
Because the Right Code Saves You 25% in Tariffs.
πΌ Precision in Classification = Profit in Profitability.
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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.