test |
standard |
appearance |
white or light yellow crystalline powder |
identification(ir) |
corresponding |
specific rotation |
-75°~ -88° |
specific absorbance |
500-550 |
acidity |
2.6~4.1 |
water |
9.0-12.0% |
crystallinity |
meets the requirements |
largest single impurity |
not more than 1.0% |
total impurities |
not more than 2.0% |
assay |
950-1030ug/mg(on anhydrous basis) |