Pefloxacin mesylate:

1.Character: white or light yellow crystal powder

2.Identification: starch iodide paper test shows blue color

3.Malonic acid/acetic anhydride test: solution shows brownish-red color.

4.IR conforms to the reference spectrum

5.Ph: 3.5-4.5 (0.1g/10ml in water)

6.Fluoride ≥4.0%

7.Clarity of solution: Clear or not more opalescent than reference suspension

8.Color of solution: Not more intensely colored than YG

9.Related substances: the spots obtained from the test solution are not more intensely than the principle spot obtained from the standard solution (1.0%)

10.Loss on drying ≤8.5% (120°C)

11.Assay ≥99%