| Veterinary pharmacopoeia |
| (2010) | BP2009 | EP6 | USP 31 |
| Traits: white or yellowish crystals or powder | White or yellowish crystal or powder | Same as BP | Same as BP |
| Melting point: 197-200 ° C | 197-200 ° C | 197-200 ° C | 197-200 ° C |
| Identification: (1) (2) (3) should be consistent | ABCD should be in accordance with | ABCD should be in accordance with | AB should meet |
| pH: ≤ 0.1mol/L NaOH 0.2ml | ≤ 0.1mol/L NaOH 0.2ml | Same as BP | Same as BP |
| Chloride: ≤ 0.01% | / | / | / |
| Related substances: ≤ 0.5% (TLC) | ≤ 0.5% (TLC) | ≤ 0.5% (TLC) | / |
| Loss on drying: ≤ 0.5% | ≤ 0.5% | ≤ 0.5% | ≤ 0.5% |
| Residue on ignition: ≤ 0.1% | ≤ 0.1% | ≤ 0.1% | / |
| Heavy metal: not more than 10 parts per million | ≤20PPM | ≤20PPM | ≤20PPM |
| selenium: | / | / | ≤ 0.003% |
| Content (dry product): not less than 99.0% | 99.0-101.0% | 99.0-101.0% | 99.0-100.5% |
