Description

Fisetinidol-(4B8)-Catechin is a specialized proanthocyanidin oligomer, a member of the flavonoid family with the CAS registry number 57526-59-7. This compound is valued for its complex polyphenolic structure, which serves as a key building block and reference standard in advanced phytochemical research and product development. It is primarily sought by research institutions and manufacturers in the nutraceutical, cosmetic, and pharmaceutical industries for its role in studying bioactive natural products.

Application

• Pharmaceutical Reference Standard: Used as a high-purity analytical standard for the identification and quantification of proanthocyanidins in drug discovery and quality control laboratories.
• Nutraceutical R&D: Serves as a critical research material for investigating the bioavailability, metabolism, and health benefits of complex flavonoids in dietary supplements.
• Cosmetic Actives Development: Employed in the formulation and testing of advanced skincare products for its potential antioxidant and skin-protective properties.
• Plant Biochemistry Research: Essential for studies on flavonoid biosynthesis, tannin chemistry, and the structural characterization of plant extracts.
• Food Science Analysis: Used as a marker compound in the analysis of polyphenol content in beverages like wine and tea, and in functional foods.

Basic Information

Product Name	Fisetinidol-(4B8)-Catechin
CAS No.	57526-59-7
Molecular Formula	C30H26O12
Molecular Weight	578.52 g/mol
Synonyms	Fisetinidol-(4β→8)-Catechin; Procyanidin B-8; Procyanidin B8; Catechin-(4α→8)-fisetinidol; [4,8']-Bi-fisetinidol; Epicatechin-(4β→8)-fisetinidol; 57526-59-7; Fisetinidol-catechin dimer
EINECS	Contact for details

Quality Control

Our Fisetinidol-(4B8)-Catechin is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity for research applications. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles. We support compliance with relevant research and development standards, and specifications can be provided to meet specific project 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 hygroscopic (moisture-sensitive) and must be kept in a desiccated environment to maintain stability and purity.

Specification

Item	Specification
Appearance	Light brown to brown powder
Identification (HPLC)	Conforms
Identification (IR)	Conforms to reference spectrum
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.