Description

Procyanidin B5 3,3'-Di-O-gallate is a specific, high-purity proanthocyanidin compound, a member of the polyphenol family known for its potent antioxidant and bioactive properties. This compound is of significant commercial interest for its targeted biological activity and structural specificity, which are critical for advanced research and formulation development. It is primarily sought by manufacturers and researchers in the nutraceutical, cosmeceutical, and pharmaceutical industries for applications requiring standardized, well-characterized botanical extracts.

Application

• Nutraceutical Ingredient: Used in the formulation of high-end dietary supplements targeting oxidative stress, cardiovascular health, and cellular protection.
• Cosmeceutical Actives: Incorporated into anti-aging skincare, sun care, and hair care products for its antioxidant and collagen-stabilizing effects.
• Pharmaceutical Research: Serves as a reference standard and active pharmaceutical ingredient (API) intermediate in preclinical studies for inflammation and metabolic disorders.
• Functional Food & Beverages: Added to health-promoting foods and drinks to enhance their bioactive profile.
• Analytical Standard: Employed as a certified reference material (CRM) for quality control and assay development in analytical laboratories.

Basic Information

Product Name	Procyanidin B5 3,3'-Di-O-gallate
CAS No.	106533-60-2
Molecular Formula	C₇₄H₆₀O₄₀
Molecular Weight	1689.22 g/mol
Synonyms	Procyanidin B5 digallate; Procyanidin B5 3,3'-di-O-gallate; Procyanidin B5 3,3''-Di-O-gallate; (-)-Epicatechin-(4β→8,2β→O→7)-(-)-epicatechin-3,3'-di-O-gallate; Proanthocyanidin B5 digallate; Grape seed proanthocyanidin B5 digallate
EINECS	Contact for details

Quality Control

Our Procyanidin B5 3,3'-Di-O-gallate is produced under strict quality management systems. Each batch is characterized and tested using advanced analytical techniques including HPLC, MS, and NMR to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, impurities, and residual solvents is provided with every shipment, supporting compliance with cGMP and relevant industry guidelines for botanical ingredients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C for long-term stability. The product is hygroscopic (moisture-sensitive) and should be handled under dry conditions to prevent degradation.

Specification

Item	Specification
Appearance	Brown to reddish-brown powder
Identification (HPLC, MS)	Conforms to reference standard
Assay (HPLC)	≥95.0%
Loss on Drying	≤5.0%
Residual Solvents (GC)	Meets ICH guidelines
Heavy Metals (ICP-MS)	<10 ppm
Total Aerobic Microbial Count	<1000 CFU/g
Total Yeast & Mold	<100 CFU/g

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