What Is Resveratrol (501-36-0)?
Resveratrol is 5-[(E)-2-(4-hydroxyphenyl)ethen-1-yl]benzene-1,3-diol, a natural plant compound with CAS number 501-36-0. It appears as white to off-white crystalline powder, almost odorless and is one of the most studied botanical actives in the global plant extract market.
Resveratrol is a stilbene — a C6-C2-C6 polyphenolic compound. It exists in cis and trans isomeric forms; only trans-resveratrol is biologically active and is the form used in supplements. UV light converts trans to cis, so light-protective packaging is essential.
In dietary supplements resveratrol is dosed at 100-500 mg per day, often combined with quercetin, curcumin, or omega-3 oils. It is also widely used in anti-aging and skin-brightening cosmetic formulations at 0.5-2.0% concentrations.
Key Properties of Resveratrol
| Property | Specification |
|---|---|
| Product Name | Resveratrol |
| CAS Number | 501-36-0 |
| Chemical Name | 5-[(E)-2-(4-hydroxyphenyl)ethen-1-yl]benzene-1,3-diol |
| Appearance | White to off-white crystalline powder, almost odorless |
| Purity | ≥98% (HPLC) |
| Melting Point | Approx. 253-255 °C |
| Solubility | Practically insoluble in water (30 mg/L); soluble in ethanol, DMSO and dilute alkali |
| Natural Sources | Japanese knotweed (Polygonum cuspidatum) root; Grape (Vitis vinifera) skin; Red wine; Blueberry (Vaccinium corymbosum) |
Sources & Extraction
Resveratrol is naturally found in Japanese knotweed (Polygonum cuspidatum) root, Grape (Vitis vinifera) skin, Red wine and Blueberry (Vaccinium corymbosum). ZHII extracts resveratrol from the most abundant commercial source, ensuring consistent purity and supply.
ZHII extracts trans-resveratrol from Polygonum cuspidatum (Japanese knotweed, "Hu Zhang" in Chinese medicine) root — the richest commercial source, with dried root containing 1-3% resveratrol. The process uses ethanol extraction, hydrolysis of glycosides (polydatin to resveratrol), and crystallization to deliver ≥98% HPLC trans-resveratrol.
Applications of Resveratrol
Few botanical actives cross industry boundaries as easily as resveratrol:
Dietary Supplements
Anti-aging and cardiovascular health capsules; commonly combined with quercetin, curcumin, omega-3 and CoQ10.
Cosmetics & Personal Care
Anti-aging active in face creams, eye serums and after-sun formulations; supports skin barrier and oxidative defense.
Functional Food & Beverage
Added to antioxidant teas, functional drinks and fortified juices.
Pharmaceutical Research
A widely used reference compound in stilbene pharmacology, sirtuin activation and metabolic health research.
Recommended Use & Dosage
In dietary supplements 100-500 mg per day is typical. In cosmetic formulations 0.5-2.0% in creams and serums.
Packaging & Storage
1 kg aluminum foil bags with double PE liner (light-protective), 5 kg plastic pails and 25 kg fibre drums.. Store in a cool, dry place away from direct sunlight, tightly sealed to protect from moisture. When stored properly, the product remains stable for at least 24 months from the production date.
Why Source Resveratrol from ZHII?
- Factory-direct supply — we manufacture and export plant extracts from Xi’an, China, with competitive pricing and stable long-term stock.
- Certified quality — ISO9001 and ISO14001 certified production; KOSHER and HALAL certified products; a Certificate of Analysis accompanies every batch.
- Global experience — customers in more than 50 countries across the EU, the Americas and Asia trust ZHII as their plant extract supplier.
- Flexible quantities — from free evaluation samples and small trial packs to full container loads.
- Technical support — our team provides formulation guidance, regulatory documents and application advice.
Frequently Asked Questions
What is the difference between trans-resveratrol and cis-resveratrol?
Trans-resveratrol is the stable, biologically active form; cis-resveratrol is the inactive isomer formed by UV exposure. All commercial resveratrol supplements should specify "trans-resveratrol" content on the label. ZHII supplies ≥98% trans-resveratrol by HPLC.
Is resveratrol from grape skin or Japanese knotweed better?
Grape skin resveratrol is naturally lower in concentration (0.5-1%) but carries the "grape" marketing claim; Japanese knotweed root contains 1-3% resveratrol and is the most practical commercial source. Both yield chemically identical trans-resveratrol after extraction.
Does ZHII supply resveratrol with COA and isoform testing?
Yes. Every batch ships with a COA specifying trans-resveratrol content (HPLC), cis-resveratrol content, total polyphenols, heavy metals, microbial count and residual solvents. ISO9001/ISO14001 production certificates are available.
Get a Free Sample of Resveratrol
Looking for a reliable Resveratrol manufacturer and supplier? ZHII offers high-purity Resveratrol (501-36-0) with fast worldwide delivery and free samples. Visit our plant extract catalog to explore the full botanical extract range, or contact us today by email at sxzhiyi@126.com or WhatsApp +86 151 0299 2009 for a quotation within 24 hours.