| ≥1 piece |
Gallic Acid
|
|
Top quality of Japanese standard
|
Top quality of national standard
|
Factory standard
|
|
Content¡¡ % ≥
|
98.5
|
98.5
|
99.50
|
|
Water solubility test
|
Yellowish, clear
|
Yellowish, clear
|
Yellowish, clear
|
|
Loss on drying % ≤
|
10.0
|
10.0
|
10.0
|
|
Residue on ignition % ≤
|
0.05
|
0.10
|
0.05
|
|
Sulphate % ≤
|
10.0 PPM
|
0.02
|
10.0 PPM
|
|
Tannin test≤
|
1.0 PPM
|
1.0 PPM
|
1.0 PPM
|
|
Turbidity ≤
|
10.0 PPM
|
10.0 PPM
|
10.0 PPM
|
|
Chromatic number APHA ≤
|
150
|
180
|
150
|
|
Characteristic
|
Specification
|
Method
|
Source
|
|
Assay
|
> 98.0%
|
Acid-Base Titration
|
Reagent Chemicals, 9th ed., ACS
|
|
Al
|
2000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
Ca
|
4000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
Fe
|
3000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
Mg
|
1000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
K
|
2000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
Na
|
2500 ppb max
|
Manufacturer Method
|
Manufacturer Method
|
|
Zn
|
4000 ppb max
|
Manufacturer Method
|
Manufacturer Method
|