Description

Castalagin is a hydrolyzable tannin belonging to the ellagitannin class, known for its distinct chemical structure and potent biological activities. This high-purity compound is valued for its strong antioxidant properties and its role as a key reference standard in analytical chemistry. It serves critical functions in the pharmaceutical, nutraceutical, and cosmetic industries, where precise quality and reliable sourcing are paramount for research, development, and quality control.

Application

• Pharmaceutical Reference Standard: Used as a high-purity analytical standard for the identification and quantification of ellagitannins in herbal medicines and botanical extracts via HPLC and LC-MS.
• Nutraceutical & Functional Food Research: Investigated for its antioxidant, anti-inflammatory, and potential prebiotic effects in dietary supplements and health-promoting food formulations.
• Cosmetic & Skincare Actives: Incorporated into formulations for its antioxidant capacity, helping to protect skin from oxidative stress and environmental damage.
• Biochemical & Pharmacological Research: Serves as a key compound in studies exploring enzyme inhibition, metabolic pathways, and the health benefits of polyphenols.
• Beverage & Food Science: Studied for its contribution to the sensory properties, stability, and health profile of wines, fruit juices, and other tannin-rich products.
• Quality Control (QC) & Assurance: Essential for manufacturers to verify the authenticity and potency of raw materials like oak wood extracts, pomegranate, and other ellagitannin sources.

Basic Information

Product Name	Castalagin
CAS No.	24312-00-3
Molecular Formula	C41H26O26
Molecular Weight	934.63 g/mol
Synonyms	Castalagin; Vescalagin (isomer); 1,2,3-Tri-O-galloyl-4,6-(S)-hexahydroxydiphenoyl-β-D-glucose; β-1-O-Galloyl-2,3:4,6-bis-(S)-hexahydroxydiphenoyl-D-glucose; Ellagitannin C; Quercus ellagitannin; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our Castalagin is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as identity (HPLC, IR), assay purity, and related substance profiles. We support compliance with relevant guidelines for reference standards and can provide material suitable for research and analytical applications.

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, long-term storage under an inert atmosphere (e.g., nitrogen or argon) is recommended for optimal stability.

Specification

Item	Specification
Appearance	Off-white to light tan powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥95.0%
Water Content (KF)	≤5.0%
Residue on Ignition	≤1.0%

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