Description

Tannic Acid CAS NO 5424-20-4 is a naturally occurring polyphenolic compound widely recognized for its protein-binding and astringent properties. This versatile chemical is essential for applications demanding high purity and consistent performance, from industrial processes to advanced research. It serves as a critical raw material for manufacturers in the leather tanning, food & beverage, pharmaceutical, and water treatment industries, where its quality directly impacts final product integrity.

Application

• Leather Tanning & Processing: Acts as a primary vegetable tanning agent to convert raw hides into durable, stable leather.
• Food & Beverage Industry: Used as a clarifying agent in beer, wine, and juice production, and as a flavoring agent or preservative (E181).
• Pharmaceuticals & Cosmetics: Employed as an astringent in topical medical formulations, ointments, and skincare products for its pore-tightening and anti-inflammatory effects.
• Water Treatment & Chemical Synthesis: Functions as a flocculant to remove impurities and as a key intermediate or catalyst in synthesizing other chemicals.
• Adhesives & Inks: Serves as a modifier to improve the binding properties and durability of adhesives and printing inks.
• Analytical Chemistry & Research: Utilized as a reagent for protein precipitation, alkaloid detection, and in various biochemical assays.

Basic Information

Product Name	Tannic Acid
CAS No.	5424-20-4
Molecular Formula	C76H52O46
Molecular Weight	1701.20 g/mol
Synonyms	Tannin; Gallotannic Acid; Gallotannin; Chinese Tannin; Quebracho Tannin; Tannic Acid (FCC); Digallic Acid; Penta-m-digalloylglucose; EINECS 226-565-8
EINECS	226-565-8

Quality Control

Our Tannic Acid is produced and tested under a stringent quality management system to ensure it meets the high standards required by diverse industrial and research applications. We offer grades compliant with FCC (Food Chemicals Codex) for food-related uses and can provide material suitable for general industrial and technical applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is available for every batch upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can lead to caking and degradation.

Specification

Item	Specification
Appearance	Light yellow to tan amorphous powder
Identification (IR)	Conforms
Assay (Tannic Acid)	Min. 98.0%
Loss on Drying	Max. 7.0%
Residue on Ignition (Sulfated Ash)	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm
Arsenic (As)	Max. 3 ppm
Solubility (in Water)	Freely soluble, solution may be opalescent

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