Gerbsäure

Tannins Molecular formula:C76H52O46 Molecular weight:1700 CAS No. 1401-55-4 Application: 1. Tannage,ink making, paper sheet,silk gluing,boiler cleaning media and so on. 2. Dying Intermediary reagent. 3. Beer and vinaceous clarifying agent 4. Rubber coagulator. 5.pharmacy.tannic acid as the ashaemostatic. Properties :Our Tannic Acid extract from Gallnuts,have industrial grade,pharmaceutical grade,food grade.straw yellow--light brown powder or loose polish flake or sponginess solid.Turn to black if exposure to air.It's odorless but intense acerbity.Soluble in water, ethanol,acetone,hardly soluble in benzene,chloroform,ether,and petroleum ether.Melting and decompounding on point 210215,flash point 187.self-ignite on 526.6 and no toxicity.