Product Introduction
| Item | Specification |
| Product Name | Quercetin |
| Synonyms | 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one; Quercetine; Meletin; Natural Quercetin Flavonoid Powder |
| CAS Number | 117-39-5 |
| Molecular Formula | C₁₅H₁₀O₇ |
| Molecular Weight | 302.24 g/mol |
| Appearance | Bright yellow crystalline fine powder, odorless, uniform crystal texture, no caking, no impurities or discoloration under standard sealed storage conditions |
| Purity (HPLC) | Quercetin ≥98.0% / ≥99.0% (Research Grade / Premium Functional Grade, customizable) |
| Melting Point | 314–316°C (lit.) |
| Loss on Drying | ≤ 0.2% |
| Residue on Ignition | ≤ 0.1% |
| Testing Method | HPLC / NMR / Mass Spectrometry / IR Spectrum / Biological Activity Assay |
| Production Method | Natural Sophora Japonica Flower Bud Raw Material Screening → Ethanol-Water Circulation Refining → Macroporous Resin Purification → Preparative HPLC Separation → Low-Temperature Recrystallization → Vacuum Drying |
| Solubility | Insoluble in cold water, slightly soluble in hot water, freely soluble in ethanol, methanol and alkaline solutions; stable in acidic and neutral environments; insoluble in petroleum ether and chloroform |
| Core Feature | High-purity natural flavonoid monomer, extreme antioxidant activity, multi-target anti-inflammatory, antiviral and immune-regulating properties, stable molecular structure, high experimental repeatability and formula compatibility |
| Package | 1g/5g/10g amber sealed bottle, 100g/1kg vacuum drum; moisture-proof & light-proof vacuum packaging, customized specifications supported |
| Storage | Store in vacuum-sealed, low-temperature, dry and dark conditions; avoid high temperature, strong light, humid air and alkaline environment to prevent flavonoid structural decomposition and activity loss |
| Shelf Life | 24 months under standard sealed low-temperature dark storage |
Product Description
Quercetin is a premium high-activity natural flavonoid monomer, chemically defined as 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one, primarily extracted from natural Sophora Japonica flower buds and various edible plants. Renowned as one of the most powerful natural antioxidants in nature, Quercetin possesses comprehensive biological activities including super antioxidant, multi-target anti-inflammatory, antiviral, cardiovascular protective and immunomodulatory effects. It is a core raw material widely applied in biomedical research, immune health supplements, cardiovascular care products and high-end anti-aging skincare manufacturing. We provide two mainstream high-grade specifications: 98% research grade and 99% premium functional grade, produced through full-process low-temperature purification and preparative HPLC refining technology.
Different from ordinary plant crude extracts containing mixed flavonoids, cellulose and pigment impurities, our refined Quercetin is a single pure monomer with fixed molecular structure and accurate content. The standardized production process completely removes residual solvents, heavy metals and heterologous impurities, effectively eliminating experimental interference and finished product formula instability. All production procedures comply with GMP dust-free purification standards, ensuring ultra-high purity, stable biological activity and excellent batch-to-batch consistency for every batch of products.
In antioxidant performance, Quercetin exhibits exceptional free radical scavenging capacity, far exceeding common antioxidants like vitamin C and vitamin E. It efficiently eliminates intracellular reactive oxygen species, inhibits lipid peroxidation chain reactions, reduces cellular oxidative damage, and delays body and skin aging caused by long-term oxidative stress. It effectively improves sub-health problems such as physical fatigue, metabolic decline and low immunity caused by daily oxidative damage.
In anti-inflammatory and antiviral regulation, Quercetin blocks multiple inflammatory signaling pathways, significantly reduces the secretion of pro-inflammatory cytokines, relieves acute irritation and chronic low-grade inflammation, and alleviates tissue inflammatory damage. Meanwhile, it exerts unique antiviral activity by inhibiting viral adsorption and replication, strengthening the body’s defense against external viral invasion. It also protects vascular endothelial cells, improves blood circulation, maintains cardiovascular system stability, and provides reliable raw material support for cardiovascular pharmacological research and health product development.
In immune regulation and skincare fields, Quercetin modulates immune cell proliferation and cytokine balance, enhances innate immune defense capabilities, and maintains long-term immune homeostasis. For skincare applications, its excellent antioxidant and anti-inflammatory properties resist UV photoaging, relieve skin redness and sensitivity, repair damaged skin barriers, fade dullness and fine lines, and improve overall skin texture, making it a classic raw material for high-end anti-aging and soothing skincare formulas.
Our high-purity Quercetin presents uniform bright yellow crystalline fine powder with delicate texture, no agglomeration and no peculiar smell. Every batch undergoes full-index quality inspection including HPLC purity calibration, NMR structural identification, mass spectrometry molecular verification and cell-level activity testing. Strict quality control ensures compliance with USP, EP, cosmetic-grade and food-grade international raw material standards. With stable physical and chemical properties and wide formula compatibility, it is widely applicable for scientific research experiments, immune and cardiovascular health supplement production and cosmetic formula development.
We maintain long-term stable bulk inventory, support flexible supply from small trial samples to large-scale industrial orders, and provide customized purity and packaging solutions to meet diversified R&D and production needs of global customers.
Functions & Benefits
Super Strong Antioxidant & Anti-Aging
Powerfully scavenges excess intracellular free radicals, inhibits lipid peroxidation and cellular oxidative damage, delays skin and tissue aging, and significantly improves body sub-health caused by long-term oxidative stress.
Multi-Target Anti-Inflammatory Relief
Inhibits multiple inflammatory signaling pathways, reduces pro-inflammatory factor release, relieves chronic low-grade inflammation and acute tissue irritation, and reduces systemic inflammatory damage.
Excellent Antiviral Activity
Blocks viral adsorption and replication, enhances the body’s antiviral defense capability, and assists in improving immune resistance against external microbial invasion.
Cardiovascular & Vascular Protection
Protects vascular endothelial cell activity, improves microcirculation, maintains normal blood vessel elasticity, and supports long-term cardiovascular system health and stability.
Immune Balance & Defense Enhancement
Regulates immune cell activity and cytokine secretion balance, enhances innate immune defense, corrects immune imbalance, and maintains systemic immune homeostasis.
Skin Repair & Anti-Photoaging
Resists UV-induced skin oxidative damage and photoaging, relieves sensitive redness and inflammation, repairs damaged skin barriers, fades dullness and fine lines, and brightens skin tone.
High-Purity Monomer & Zero Formula Interference
98%–99% ultra-high purity single flavonoid monomer, free of plant impurities and solvent residues, stable molecular structure, ensuring accurate experimental data and consistent finished product efficacy.
Applications
Biomedical & Pharmacological Research
Used as standard flavonoid monomer reagent for antioxidant, anti-inflammatory, antiviral, cardiovascular protection and immune regulation mechanism research in university and institutional laboratories.
Immune & Antiviral Health Supplements
Core functional raw material for immune enhancement, antiviral defense and anti-inflammatory conditioning health products, supporting daily body resistance improvement.
Cardiovascular Health Care Products
Applied in vascular protection and cardiovascular conditioning health supplements to maintain blood vessel health and systemic circulation stability.
High-End Anti-Aging Skincare Products
Key ingredient for antioxidant anti-aging, soothing repair and anti-photoaging skincare formulas, improving skin sensitivity, dullness and aging problems.
Functional Food & Nutritional Additives
Used as natural high-efficiency antioxidant and nutritional additive in functional foods and nutritional products to enhance product health value and oxidation resistance.
Natural Plant Pharmacology Teaching Experiment
Served as standardized high-purity Quercetin reagent for natural flavonoid structure identification and pharmacological teaching experiments to ensure stable and repeatable experimental results.
FAQ
Q1: What is Quercetin used for?
A: Quercetin is a high-activity natural flavonoid monomer, famous for super antioxidant, anti-inflammatory, antiviral and cardiovascular protective effects. It is widely used in immune health supplements, cardiovascular care products, anti-aging skincare and biomedical pharmacological research.
Q2: What makes Quercetin unique among flavonoids?
A: Quercetin has extremely strong antioxidant capacity, far superior to most conventional flavonoids and common antioxidants. It integrates anti-inflammation, antivirus, vascular protection and immune regulation, featuring multi-effect synergy, high safety and wide formula compatibility.
Q3: What are your product advantages?
A: Our Quercetin adopts preparative HPLC fine purification and low-temperature recrystallization technology, reaching 98%/99% ultra-high purity with zero impurity residues, stable monomer structure, consistent batch activity and reliable experimental repeatability.
Q4: How to store Quercetin correctly?
A: Quercetin flavonoid structure is sensitive to high temperature, strong light, humidity and alkaline environments. It must be vacuum-sealed and stored in low-temperature, dry and dark conditions to avoid active ingredient decomposition and ensure 24-month shelf life.
Q5: What does qualified high-purity Quercetin look like?
A: Premium Quercetin is uniform bright yellow crystalline fine powder with delicate crystal texture, odorless, no caking, no discoloration and no visible foreign impurities.
Q6: Can I get free test samples?
A: Yes, we provide free Quercetin test samples for academic research, pharmacological efficacy testing and formula trial production. Bulk orders support customized purity and personalized packaging solutions.
