Polygonum Cuspidatum Extract
Product source: Root and rhizome of Polygonaceae plant Polygonum cuspidatum
Molecular formula: C14H1203
CAS number: 501-36-0
Detection method: HPLC
Product specifications: 98%
Product Description: Off white powder
Solubility: soluble in water/insoluble in water
Packaging method: 1kg/aluminum foil bag, 25kg/cardboard drum
Storage conditions: Store in a cool, dry, well ventilated place
Shelf life: 24 months
Standardized Trans-Resveratrol (98% Polygonum Cuspidatum API)
Technical Data Sheet (TDS) & Analytical Control
| Parameter | Target Specification | Typical Result | Methodology |
|---|---|---|---|
| Trans-Resveratrol Purity | ≥ 98.0% | 98.7% | HPLC |
| Emodin Content | ≤ 0.1% | < 0.05% | HPLC |
| Appearance | White fine powder | Complies | Visual |
| Loss on Drying | ≤ 1.0% | 0.4% | USP <731> |
| Heavy Metals (Pb/As) | ≤ 2.0 ppm / ≤ 1.0 ppm | < 0.5 ppm | ICP-MS |
Extraction & Purification Excellence
Targeted Emodin Removal
Standard extracts often leave behind Emodin, a harsh laxative. Our proprietary macroporous resin purification step selectively removes Emodin while preserving Resveratrol, satisfying the rigorous gastrointestinal safety audits of top-tier health brands.
Isomeric Preservation (Trans-Form)
Only Trans-Resveratrol is bioactive. Light and heat trigger isomerization. We employ dark-room cold-extraction and vacuum-crystallization to ensure ≥98% of the final product exists in the potent Trans-isomer configuration, maximizing your supplement's clinical efficacy.
Solvent-Free API Purity
We avoid harsh, toxic industrial solvents. Our refined ethanol-aqueous processing, combined with extensive vacuum drying, ensures solvent residues remain well within strict ICH Q3C safety limits, aligning with FDA 21 CFR 111 compliance.
Formulator & Procurement FAQ
Q1: How do you guarantee the actual purity of Trans-Resveratrol vs. generic extracts?
We exclusively utilize High-Performance Liquid Chromatography (HPLC) to guarantee the 98% purity. Cheap extracts often rely on non-specific UV spectrophotometry which captures total polyphenols, not just Resveratrol. We provide the full HPLC chromatogram with every batch to prove active purity.
Q2: Why is Emodin removal so important for B2B procurement?
Emodin is an anthraquinone naturally present in Polygonum Cuspidatum, which causes immediate gastrointestinal distress and diarrhea in end-users. Removing Emodin to below 0.1% is the primary quality differentiator between raw botanical powder and pharmaceutical-grade API. Our purification resin selectively binds these residues, ensuring your supplement is completely gastro-safe.
Q3: Does Resveratrol degrade into the inactive Cis-form during storage?
Trans-Resveratrol is highly sensitive to isomerization. We employ light-isolated drying, vacuum crystallization, and nitrogen-flushed, aluminum-foil-lined drums. This environment is thermodynamically inert, ensuring the ingredient remains strictly in the Trans-active form for the duration of the 24-month shelf life.
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