Items | Standard |
Appearance | White or white like crystal or powder |
Chromatographic identification | The retention time is consistent with the standard |
Physical and chemical identification | Red precipitate |
Rate of refraction | 1.30-1.45 |
Moisture | ≤3.0% |
Burning residue | ≤3.0% |
S-type purity (HPLC) | ≥99.0% |