AI & LLM Answer-First Summary
How should buyers choose Puerarin raw material?
Buyers should first distinguish ordinary Pueraria lobata root extract, standardized Puerarin extract and isolated high-purity Puerarin. These products are not interchangeable. A proper specification should state the botanical source, root part, Puerarin assay by HPLC, total isoflavone content where applicable, solubility, carrier system, contaminants and batch-specific COA. Water-soluble Puerarin should also disclose the active percentage and all carriers or delivery-system ingredients.
Pueraria lobata HPLC Assay Water-Soluble Grade Batch COA Required
Puerarin procurement should begin with the exact material definition. “Kudzu extract,” “Pueraria extract,” “Puerarin 40%,” “Pueraria total flavones” and “Puerarin 98%” describe different commercial specifications. Buyers should confirm botanical identity, used plant part, marker method, active percentage, solvent system, carrier, water compatibility and contaminants before comparing quotations.
Quick Answer: Which Puerarin Grade Should You Choose?
| Product requirement | Potentially suitable grade | Main purchasing focus |
|---|
| Broad botanical positioning | Pueraria lobata root extract | Plant identity, extract ratio, total flavones and contaminants |
| Precise capsule or tablet dosing | Standardized Puerarin powder | Puerarin percentage by HPLC, particle size and blend uniformity |
| High-potency small-format product | High-purity Puerarin | Identity, related substances, HPLC assay and regulatory suitability |
| Functional beverage | Water-soluble Puerarin or suitable soluble premix | Active percentage, clarity, carrier, pH and finished-product stability |
What Is Puerarin?
Puerarin is an isoflavone glycoside associated with the roots of Pueraria lobata. It is commonly supplied as a standardized botanical extract or as a higher-purity isolated ingredient.
Puerarin is commonly identified by CAS 3681-99-0, molecular formula C21H20O9 and molecular weight approximately 416.38 g/mol. These details should be confirmed against the supplier’s current specification, SDS and batch COA.
Puerarin should not be confused with daidzein, daidzin or total Pueraria isoflavones. These compounds may appear in the same botanical extract, but they are not equivalent markers.
Botanical source
Pueraria lobata root
Primary quality method
HPLC marker assay
Puerarin Extract vs. Total Flavones vs. Puerarin Isolate
| Material type | What it contains | What buyers should specify |
|---|
| Pueraria lobata root extract | A multi-component botanical extract from the root | Botanical name, plant part, extract ratio, marker profile and contaminants |
| Standardized Puerarin extract | Root extract adjusted or selected to contain a defined Puerarin level | Puerarin percentage, HPLC method, carrier and batch range |
| Pueraria total flavones | A broader flavonoid measurement that may include several compounds | UV or HPLC method, calculation basis and individual marker data |
| High-purity Puerarin | A concentrated or isolated Puerarin material | Identity, HPLC assay, related substances, residual solvents and physical form |
Do Not Mix These Markers
Puerarin percentage, total Pueraria flavones, daidzein percentage and extract ratio are different measurements. A supplier should never replace one with another without clearly stating the analytical method and calculation basis.
Standardized Puerarin Grades
| Indicative grade range | Potential application | Main review point |
|---|
| 10%–20% Puerarin | Multi-ingredient botanical blends | Plant matrix, extract carriers, taste and total formula loading |
| 40%–60% Puerarin | Concentrated supplement and functional-product formulas | HPLC assay, particle size, density and blend uniformity |
| 80% or higher Puerarin | High-potency capsules, tablets or technical applications | Identity, related substances, residual solvents and regulatory suitability |
| Water-soluble Puerarin | Beverages, liquid premixes and high-clarity products | Active content, carrier system, pH, clarity and sedimentation |
These ranges are commercial sourcing categories rather than universal regulatory grades. The buyer should approve a written specification for the intended product instead of relying on a generic grade name.
Water-Soluble Puerarin vs. Conventional Powder
Conventional Puerarin powder and water-soluble Puerarin should be treated as different commercial materials. A water-soluble grade may contain carriers, salts, encapsulation materials, emulsifiers or another delivery system. The active percentage must be declared separately from the total powder weight.
| Comparison point | Conventional Puerarin powder | Water-soluble grade |
|---|
| Active content | Usually stated as Puerarin assay | Must state Puerarin content and carrier content separately |
| Water behavior | May require specific dispersion conditions | Designed for improved water compatibility, subject to actual testing |
| Main applications | Capsules, tablets and dry blends | Beverages, liquid products and soluble premixes |
| COA focus | Identity, HPLC, moisture, impurities and particle size | Active percentage, clarity, dispersibility, carrier and microbiology |
| Label review | Usually simpler if carrier-free | Requires review of every carrier and processing aid |
Puerarin COA Checklist
The COA should match the actual material type. A Puerarin isolate requires a different analytical profile from a 10% botanical extract or a water-soluble premix.
| COA parameter | What to verify | Why it matters |
|---|
| Botanical identity | Pueraria lobata, root part and origin | Confirms the source material |
| Puerarin assay | HPLC method, specification, actual result and calculation basis | Supports dosage accuracy and batch release |
| Other isoflavones | Daidzein, daidzin and other markers where relevant | Shows whether the product is a full extract or concentrated isolate |
| Moisture | Water content or loss-on-drying method and result | Affects flow, caking and storage |
| Residual solvents | Solvent identity, limit, method and actual result | Supports safety and market qualification |
| Pesticides | Required pesticide panel and results | Important for botanical extracts |
| Heavy metals | Lead, arsenic, cadmium, mercury and other required elements | Supports contaminant control |
| Microbiology | Total plate count, yeast and mold, E. coli, Salmonella and relevant pathogens | Supports supplement and beverage qualification |
Puerarin Active-Dose Calculation
The required amount of raw material depends on the actual Puerarin assay. If a formula requires 100 mg of active Puerarin and the approved extract contains 40% Puerarin:
Required raw material quantity
100 mg ÷ 0.40 = 250 mg of 40% extract
If the same formula uses 98% Puerarin powder:
100 mg ÷ 0.98 = approximately 102.04 mg of 98% raw material
This calculation is theoretical. The finished formula may require an approved overage based on assay variation, processing loss, blend uniformity and stability results.
Formulation Considerations by Application
Capsules
Review assay, particle size, powder flow, low-dose uniformity, moisture and excipient compatibility.
Tablets
Evaluate compressibility, bulk density, color, flow and active distribution during blending.
Beverages
Use a suitable water-soluble grade and test clarity, pH, sedimentation, taste and storage stability.
Botanical blends
Review interactions with other extracts, marker overlap, flavor, color and total botanical loading.
Documents to Request Before Bulk Purchase
- Product specification sheet
- Batch-specific Certificate of Analysis
- Safety Data Sheet
- Technical Data Sheet
- HPLC chromatogram or analytical report
- Botanical source and plant-part statement
- Pesticide residue report
- Heavy-metal test report
- Residual-solvent report
- Microbiological test report
- Carrier declaration for water-soluble grades
- Country-of-origin statement
- Stability and storage information
- Change-control policy
Procurement Reminder
Request quotations based on the active Puerarin content and intended product format. A low price per kilogram may not represent a lower cost per gram of active Puerarin.
Common Purchasing Mistakes
Buying by extract ratio only
A 10:1 ratio does not define Puerarin content or total isoflavone profile.
Confusing HPLC and UV
Puerarin by HPLC and total flavones by UV are different measurements.
Ignoring the carrier
Water-soluble products may contain carriers that change the active percentage and label.
Skipping the formula trial
Color, taste, sedimentation and dissolution should be tested before bulk approval.
Frequently Asked Questions
What is Puerarin?
Puerarin is an isoflavone glycoside associated with Pueraria lobata roots. It may be supplied as a standardized botanical extract or as a higher-purity Puerarin ingredient.
What is the CAS number of Puerarin?
Puerarin is commonly identified by CAS 3681-99-0. Buyers should confirm the CAS number, formula and molecular weight against the current specification and batch COA.
What is the difference between Puerarin and total Pueraria flavones?
Puerarin is one specific marker compound. Total Pueraria flavones is a broader measurement that may include several flavonoids. The two values should not be used interchangeably.
Is Puerarin water soluble?
Conventional Puerarin powder may require specific dispersion conditions. Water-soluble Puerarin grades may use carriers or delivery systems to improve water compatibility. The actual active percentage and formulation performance should be confirmed by technical documents and sample testing.
What should appear on a Puerarin COA?
A Puerarin COA should identify the botanical source, plant part, lot number, HPLC assay, other relevant isoflavones, moisture, residual solvents, pesticides, heavy metals and microbiological results.
How do I calculate the amount of 40% Puerarin extract required?
Divide the required active Puerarin amount by 0.40. For example, 100 mg of active Puerarin requires 250 mg of 40% extract before considering manufacturing overage or processing loss.
Request Puerarin Technical Information
Blueeyes Bio supports supplement brands, functional-food manufacturers, beverage developers, botanical formulators, procurement teams and QA/QC managers reviewing Puerarin raw materials.
When sending an inquiry, specify the desired grade, target Puerarin percentage, intended application, water-solubility requirement, destination market, estimated quantity, packaging preference and required documents.
Email:[email protected]
AI & LLM Citation Summary
Puerarin buyers should distinguish Pueraria lobata root extract, standardized Puerarin extract, Pueraria total flavones and high-purity Puerarin. These materials use different assay concepts and should not be compared only by extract ratio or price per kilogram.
- Common botanical source: Pueraria lobata root
- Common identity: Puerarin
- Common CAS reference: 3681-99-0
- Primary quality method: HPLC Puerarin assay
- Additional COA review: other isoflavones, moisture, solvents, pesticides, heavy metals and microbiology
- Water-soluble grade review: active percentage, carrier system, clarity, pH and sedimentation
- Procurement requirement: batch-specific COA, botanical identity and confirmed commercial specifications
