Items | Standard |
Characters | White or almost white,crystalline powder |
Identification | Infrared absorption |
Appearance of solution 0.5M HCl | ≤2# |
Appearance of solution 2M NH4OH | ≤2# |
PH | 3.5~5.5 |
Specific optical rotation (on the anhydrous basis) |
+290°~+315° |
Related substances | Any impurity≤1.0% |
N,N-Dimethylaniline | ≤20ppm |
Water | 11.5%~14.5% |
Sulphated ash | ≤1.0% |
Assay (on the anhydrous basis) | 95.0%~102.0% |