Description features:
Tannic Acid 81% Min. ( Industry Grade ) Synonyms: Gallotannin; Gallotannic acid; Digallic Acid, Glycerite, Tannin
Molecular Formula: C76H52O46
Molecular Weight: 1701.18
H.S. Code: 32019090
CAS No.:1401-55-4
EINECS No.:215-753-2 Propertics : Light yellow to light brown powder ,with a peculiar smell and taste very astringent , soluble in a portion of water or alcohol , as well as in acetone ,insoluble in chloroform or ether . It is a mixture of hydrolyzable galloyl tannins. Specifications: ( Based on China Native GB5308-85 standards. ) Tannin Acid :---------------------------81% min.
loss on drying: -------------------------9% max.
Total Color -------------------------------------2.0
Water Solution Clarity----------------Negative
Gum or Dextrin test-------------------Negative
Residue on ignition-----------------0.2% max. Usage: For the extractction of germanium , the production of ink , rust preventer of metals, and mud treater in petroleum drilling, and as raw material for pharmaceutical industry. Storage : Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect from light. Keep in airtight containers. Package : 25 kg /Drum; 25kg/paper box; 25kg/ paper or plastic bag; 40 kg /Dru