Description

Digallic Acid is a naturally occurring polyphenolic compound, also known as tannic acid dimer, with the CAS registry number 536-08-3. It serves as a versatile intermediate and functional ingredient prized for its potent antioxidant and metal-chelating properties. This compound is essential for manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries seeking high-purity bioactive components for advanced formulations.

Application

• Pharmaceutical Intermediates: Used in the synthesis of antioxidants and active pharmaceutical ingredients (APIs) due to its bioactive phenolic structure.
• Cosmetic & Personal Care: Functions as a natural antioxidant and preservative booster in anti-aging serums, creams, and lotions.
• Analytical Chemistry: Employed as a complexometric reagent for the spectrophotometric determination of metals like iron and aluminum.
• Food & Beverage Research: Studied as a natural antioxidant and preservative for extending shelf-life in food models.
• Dye & Ink Manufacturing: Acts as a mordant and complexing agent in the production of certain dyes and pigments.
• Corrosion Inhibition: Investigated for use in formulations to protect metals from oxidation in industrial settings.

Basic Information

Product Name	Digallic Acid
CAS No.	536-08-3
Molecular Formula	C14H10O9
Molecular Weight	322.22 g/mol
Synonyms	Gallotannic Acid; Tannic Acid Dimer; 3,4,5-Trihydroxybenzoic Acid 3,4,5-Trihydroxybenzoate; 2,3,4-Trihydroxy-5-[[(3,4,5-trihydroxybenzoyl)oxy]carbonyl]phenyl Benzoate; m-Digallic Acid; Bis(3,4,5-trihydroxybenzoic) Acid Ester; Tannin Component
EINECS	208-619-9

Quality Control

Our Digallic Acid is produced under a stringent quality management system. Each batch is tested to ensure it meets high-purity standards suitable for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, prolonged exposure to air should be minimized. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Light yellow to tan powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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