items |
specifications |
assay: |
98.0% to 101.0% |
description: |
white powder |
a:infrared absorption 197k: |
concordant with the reference spectrum |
b:a solution(1 in 20) responds to the tests for calcium: |
conform to usp34 |
test items | specifications | results | ||
appearance | white powder | conform | ||
a.infrared absorption 197k | concordant with the reference spectrum | conform | ||
b.a soluton (1 in 20)responds to the tests for calcium | conform to usp30 | conform | ||
specific optical rotation | 25.0°~27.5° | 26.83° | ||
alkalinity | no pink color is produced within 5 seconds | conform | ||
loss on drying | not more than 5.0% | 1.68% | ||
heavy metals | not more than 0.002% | conform | ||
ordinary impurities | not more than 1.0% | conform | ||
organic volatile impurities | meet the requirements | conform | ||
nitrogen content | 5.7%~6.0% | 5.75% | ||
content of calcium | 8.2%~8.6% | 8.42% |