DINAYEN'S ENTERPRISE MANAGEMENT CO,.LTD

Gallic acid is a trihydroxybenzoic acid found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants.
Gallic acid is found both free and as part of hydrolyzable tannins. The gallic acid groups are usually bonded to form dimers such as ellagic acid. Hydrolysable tannins break down on hydrolysis to give gallic acid and glucose or ellagic acid and glucose, known as gallotannins and ellagitannins respectively.
Specification
Test items

Indicators
The amount of gallic acid content (dry basis) ≥

99.0
Loss on drying /(%) ≤

10.0
Tannic acid test

no cloudy
Water dissolved experiment

no cloudy
chroma（ Platinum - cobalt color number ） ≤

120
(%) ≤

0.01
Residue on ignition /(%) ≤

0.1
（NIU) ≤

10
Dissolve point

131～134.5
（CL-)/(%) ≤

0.02