Items |
Standard |
Description |
A white or yellowish-white,microfine powder. |
Particle size |
The particles of which are generally up tp 5μm in max dimension |
Larger particles which may occasionally exceed 30μm |
Melting point |
About 220℃ |
Identification |
The infrared absorbance spectrum is concordant with the reference spectrum |
A wine-red color develops |
Appearance of solution |
The solution is clear and not more intensely coloured than reference solution Y4 |
Acidity |
Not more than 1.0ml of 0.02M sodium hydroxide is required |
Specific optical rotation |
+354°~+364° |
Related Substances |
-Cl:<0.60 |
-H:<0.15 |
Substances soluble in light petroleum |
≤0.2% |
Loss on drying |
≤1.0% |
Sulphated ash |
≤0.2% |
Residual solvents |
Ethanol≤0.5% |
Acctone≤0.5% |
Dichoromethane≤0.06% |
Abnormal toxicity |
Five mice orals,none of die mice dies within 48h |
Assay(dried substance) |
97.0%~102.0% |