Description

Zinc Tannate is a coordination complex formed from zinc and tannic acid, valued for its astringent, protein-precipitating, and protective properties. This compound is particularly significant for its ability to form stable, water-resistant films and its utility as a mild preservative and clarifying agent. It serves critical functions in industries such as pharmaceuticals, leather processing, and specialty chemical manufacturing, where its unique chemical behavior is essential.

Application

• Pharmaceuticals: Used as an astringent and mild antiseptic in topical ointments, powders, and dermatological preparations.
• Leather Tanning & Processing: Acts as a tanning agent and post-tanning auxiliary to improve leather quality, color, and water resistance.
• Wine & Beverage Clarification: Employed as a fining agent to remove proteins and colloidal hazes, ensuring product clarity and stability.
• Adhesive & Sealant Formulations: Functions as a cross-linking agent and modifier to enhance water resistance and durability.
• Wood & Textile Treatment: Provides protective, water-repellent, and fungistatic properties for specialty coatings and treatments.
• Industrial Water Treatment: Utilized for precipitation and removal of proteins and certain organic contaminants.

Basic Information

Product Name	Zinc Tannate
CAS No.	8011-65-2
Molecular Formula	Complex, typically represented as Zn(C14H9O9)2 or similar
Molecular Weight	Approx. 700-800 g/mol (variable based on hydration and tannin source)
Synonyms	Tannic Acid Zinc Salt; Zinc Tannin; Zinc(II) Tannate; Tannin Zinc Complex; Tanal; Zinco Tannato; Gallotannic Acid Zinc Salt; Zinc Gallotannate
EINECS	Contact for details

Quality Control

Our Zinc Tannate is manufactured under a stringent quality management system. Each batch undergoes rigorous testing to ensure consistent composition, purity, and performance. While specific grades are available, our standard quality control includes parameters for zinc content, tannin content, loss on drying, and heavy metal limits. A Certificate of Analysis (COA) is provided with every shipment to guarantee compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and flow properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light brown to buff-colored amorphous powder
Identification (IR)	Conforms
Assay (as Zn)	10.0% - 14.0%
Loss on Drying	≤ 8.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Solubility	Practically insoluble in water and common organic solvents

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