Description

Benzoic acid, 3,4,5-trihydroxy-, (2R,2'R,3R,3'R,4R)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-3',5,5',7,7'-pentahydroxy[4,8'-bi-2H-1-benzopyran]-3-yl ester is a complex polyphenolic ester compound, recognized for its potent antioxidant and free radical scavenging properties. This high-purity specialty chemical is essential for advanced research and formulation development where stability and biological activity are critical. It serves as a key intermediate and active ingredient for B2B clients in the pharmaceutical, nutraceutical, and high-end cosmetic industries.

Application

• Pharmaceutical Intermediate: Serves as a precursor or active pharmaceutical ingredient (API) in the development of cardioprotective, neuroprotective, and anti-inflammatory drugs.
• Nutraceutical Formulations: Used as a potent natural antioxidant in dietary supplements and functional food products aimed at promoting cellular health.
• Cosmetic Actives: Incorporated into anti-aging serums, creams, and lotions for its skin-protective and rejuvenating properties against environmental stressors.
• Biochemical Research: Employed as a standard or reagent in studies focusing on oxidative stress, enzyme inhibition, and signal transduction pathways.
• Advanced Material Science: Investigated for use in stabilizing polymers or creating functional coatings due to its phenolic structure.

Basic Information

Item	Details
Product Name	Benzoic acid, 3,4,5-trihydroxy-, (2R,2'R,3R,3'R,4R)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-3',5,5',7,7'-pentahydroxy[4,8'-bi-2H-1-benzopyran]-3-yl ester
CAS No.	109280-47-9
Molecular Formula	C₄₃H₃₂O₂₂
Molecular Weight	900.70 g/mol
Synonyms	Procyanidin B2 3,3''-Di-O-gallate; Procyanidin B2 digallate; Epicatechin-(4β→8)-epicatechin-3-O-gallate-3'-O-gallate; Epicatechin gallate-(4β→8)-epicatechin gallate; Grape seed proanthocyanidin gallate; Contact for details on additional trade names and abbreviations.
EINECS	Contact for details

Quality Control

Our Benzoic acid, 3,4,5-trihydroxy-, (2R,2'R,3R,3'R,4R)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-3',5,5',7,7'-pentahydroxy[4,8'-bi-2H-1-benzopyran]-3-yl ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the stringent requirements for research and formulation. Certificates of Analysis (COA) detailing purity, impurities, and other critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, prolonged storage is recommended under an inert atmosphere such as nitrogen or argon. Keep the container tightly sealed in a dry environment to minimize moisture uptake.

Specification

Item	Specification
Appearance	Light brown to white powder
Identification (HPLC/UV)	Conforms to reference standard
Identification (IR)	Conforms to structure
Assay (HPLC)	≥95.0%
Loss on Drying	≤2.0%
Residue on Ignition	≤0.5%
Heavy Metals (as Pb)	≤20 ppm
Solvent Residues (GC)	Meets ICH guidelines

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