| Item | STANDARD |
| Appearance | yellow crystal or Liquid |
| Identification | Positive |
| Assay | >=1.70M.I.U./G |
| Absorbance ratio(325nm) | >=0.85 |
| Peroxides | max.1.00 ml of 0.01mol/L Na2S2O3 |
| Acid Value | =<2.0 |
| Related substances | A300/A326=<0.60 A350/A326=<0.54 A370/A326=<0.14 |