Description

Quercetin Dihydrate(Rg) is a high-purity, standardized botanical reference standard and active ingredient. This compound is a significant flavonoid valued for its potent antioxidant properties and role as a key marker in quality control for herbal extracts. It is essential for manufacturers and researchers in the pharmaceutical, nutraceutical, and cosmeceutical industries seeking reliable, analytically pure material for product development and standardization.

Application

• Pharmaceutical Reference Standard: Used as a primary chemical reference marker (Rg) for the identification and assay of flavonoid-containing herbal medicines and dietary supplements, such as Ginkgo biloba and Sophora japonica extracts.
• Nutraceutical Formulation: Incorporated into dietary supplements and functional foods for its well-researched antioxidant and cellular health support benefits.
• Cosmetic Active Ingredient: Formulated into anti-aging and skin-protective serums, creams, and lotions for its ability to neutralize free radicals and support skin resilience.
• Biochemical Research: Serves as a critical reagent in life science research for studying flavonoid metabolism, oxidative stress pathways, and inflammatory responses.
• Food & Beverage Fortification: Used to enhance the nutritional profile of health-focused beverages and food products.

Basic Information

Product Name	Quercetin Dihydrate(Rg)
CAS No.	29125-80-2
Molecular Formula	C15H10O7 · 2H2O
Molecular Weight	338.27 g/mol (Anhydrous: 302.24)
Synonyms	Quercetin Dihydrate; 3,3',4',5,7-Pentahydroxyflavone Dihydrate; Sophoretin; Meletin; Xanthaurine; Quercetol; Quercitin; CI 75670; Natural Yellow 10
EINECS	Contact for details

Quality Control

Our Quercetin Dihydrate(Rg) is produced under strict quality management systems to ensure batch-to-batch consistency and high analytical purity. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing identity, purity, and related substance profiles. We support compliance with relevant pharmacopeial standards (such as USP/NF) for reference materials.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Yellow to greenish-yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	≥ 98.0% (on anhydrous basis)
Water Content (KF)	9.0% - 11.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.