|
Items of Test |
Standard |
Result of Test |
|
Appearance |
White or almost withe crystalline powder |
Conforms |
|
Identification A The infraed absorption spectrum |
Conforms |
Conforms |
|
B: the reaction of primary aromatic amines |
Conforms |
Conforms |
|
C: The test of sodium |
Conforms |
Conforms |
|
Melting point |
About 197°C with decomposition |
197.5-198.6 |
|
Clarity color of solution |
Not more coloured than Y4 |
Clear,<Y4 |
|
Alkalinity |
PH=10.0-11.0 |
10.7 |
|
Loss on drying |
≤2.0% |
0.70% |
|
Related substances |
≤0.5% |
<0.5% |
|
Assay |
99.0%-101.0% |
99.9% |