|
ITEM |
STANDARD |
TEST RESULT |
|
ASSAY |
98.5~102.0% |
99.70% |
|
PHYSICAL&CHEMICAL |
||
|
APPEARANCE |
WHITE CRYSTALLINE POWDER |
COMPLIES |
|
ODOR&TASTE |
CHARACTERISTIC |
COMPLIES |
|
APPEARANCE OF SOLUTION |
CLEAR AND COLOURLESS |
CLEAR AND COLOURLESS |
|
SPECIFIC ROTATION |
-21.00°~-23.50° |
-22.64° |
|
pH |
2.5-2.9 |
2.53 |
|
MELTING POINT |
138-142℃ |
140.1℃ |
|
LOSS ON DRYING |
≤0.5% |
0.27% |
|
RESIDUE ON IGNITION |
≤0.5% |
0.05% |
|
HEAVY METAL |
||
|
As |
≤1.0ppm |
＜1.0ppm |
|
Pb |
≤3.0ppm |
＜3.0ppm |
|
Cd |
≤1.0ppm |
＜1.0ppm |
|
Hg |
≤0.1ppm |
＜0.1ppm |