|
Item |
Standard |
Results |
|
Gallic Acid Content (on dry basis) |
99.0%min |
99.50% |
|
Tannic Acid Test |
no cloudy |
Conforms |
|
Water Dissolved Experiment |
no cloudy |
Conforms |
|
Loss on Drying |
10.0%max |
7.40 |
|
Chroma: Platinum-Cobalt Color number |
180 max |
<180 |
|
Sulphates |
0.02% max |
Pass test |
|
Melting Point |
250-252℃ |
251.2℃ |
|
Residue on Ignition |
0.1% max |
0.07 |
|
Turbidity（NIU) |
10 max |
＜10 |
|
Tannic Acid |
1.0% max |
Pass test |
|
As |
3ppm max |
Pass test |