Description

5-o-Methyl Quercetin;2-(3,4-Dihydroxyphenyl)-5,7-Dihydroxy-5-Methoxy-4H-1-Benzopyran-4-One CAS NO 529-51-1 is a specific, methylated derivative of the widely studied flavonoid quercetin. This compound is valued for its enhanced metabolic stability and bioavailability compared to its parent molecule, making it a critical intermediate and reference standard in advanced research and development. It is primarily sought by the pharmaceutical, nutraceutical, and life science industries for applications in drug discovery, metabolic studies, and the formulation of high-grade dietary supplements.

Application

• Pharmaceutical Reference Standard: Used as a certified reference material (CRM) for analytical method development, validation, and quality control in drug manufacturing.
• Nutraceutical Ingredient: Incorporated into advanced dietary supplements and functional foods for its potential bioactive properties, leveraging its improved stability.
• Biochemical Research: Serves as a key intermediate or inhibitor in metabolic pathway studies, enzyme assays, and pharmacological research targeting inflammation and oxidative stress.
• Cosmeceutical Formulations: Utilized in high-end skincare products for its antioxidant properties, contributing to anti-aging and protective formulations.
• Academic & Industrial R&D: Essential for synthetic chemistry, structure-activity relationship (SAR) studies, and the development of novel flavonoid-based therapeutics.

Basic Information

Product Name	5-o-Methyl Quercetin;2-(3,4-Dihydroxyphenyl)-5,7-Dihydroxy-5-Methoxy-4H-1-Benzopyran-4-One CAS NO 529-51-1
CAS No.	529-51-1
Molecular Formula	C₁₇H₁₄O₇
Molecular Weight	330.29 g/mol
Synonyms	5-O-Methylquercetin; Quercetin 5-Methyl Ether; 3,3',4',5,7-Pentahydroxy-5-methoxyflavone; 5-Methoxy-3,3',4',7-tetrahydroxyflavone; 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-5-methoxy-4H-chromen-4-one; 5-Hydroxy-3,3',4',7-tetramethoxyflavone (isomer reference); Tamarixetin (Note: Tamarixetin is typically 4'-O-methylquercetin, a positional isomer); Quercetin 5-O-methyl ether
EINECS	208-463-2

Quality Control

Our 5-o-Methyl Quercetin is produced and tested under a strict quality management system. Each batch is analyzed to ensure high purity and consistency, with specifications typically meeting or exceeding research-grade standards. A comprehensive Certificate of Analysis (COA) detailing identity, purity (HPLC), and impurity profiles is provided with every shipment to guarantee traceability and compliance with your research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere); prolonged exposure to air, light, or elevated temperatures should be avoided to maintain stability and purity.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals	≤ 20 ppm

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