| ITEM | SPECIFICATION |
| Characteristics | yellow?crystalline?powder |
| Identification | A.?Absorption?at?353nm:?96.0%~104.0% |
| Crystallinity | Meet?the?requirement |
| PH?Value | 4.5~7.0 |
| Moisture | 6.0%~9.0% |
| Assay | >=832?ug/mg |
| Light-absorbing?at?430nm | =<0.25%(anhydrous?substance?) |
| Light-absorbing?at?490nm | =<0.20%(anhydrous?substance?) |
| U.S.?Sieve?No.20(850um) | All?pass |
| U.S.?Sieve?No.80(180um) | <5%?max?on?the?sieve |
| 4-epioxytetracycline | =<0.5% |
| Tetracycline?Hcl | =<2.0% |
| Eluting?on?the?tail?of?the?principal?peak | =<2.0% |