| Item | Limit |
| Description and solubility | Colorless or pale yellow liquid clear. Free from foreign matter, Slight characteristic odor. Miscible in water, in methanol and in ethanol |
| Specific optical rotation (D20oC/Sodium D line8% w/v, 5N HCL) | +25.2 to +26.0¡ãon anhydrous basis |
| Color of Solution | The absorbance of the test solution at 430nm,using 1cm cells and water as reference must be not more than 0.150 |
| Ph (5% v/v) | 9.9 ¨C 10.3 |
| Specific gravity | 1.120 to 1.135g/ml |
| Chromatographic purity(TLC) | Any individual impurity: not more than 0.4% Total impurities: Not more than 1.0% |
| Assay(Non-aqueous acidimetric titration) | 49.0% to 51.0% of C6H14N2O2 |
