| Item |
Specification |
| GB 8851-2005 |
USP 29-NF24 |
BP 2000 |
| Characters |
/ |
/ |
Colorless crystals or white crystalline powder |
| Purity |
99 |
98.0-102.0 |
99.0-100.5 |
| (on dry base) % ≥ |
| Melting Point ℃ |
95-98 |
96-99 |
96-99 |
| Acidity |
qualified |
qualified |
qualified |
| Sulfate(SO42-) % ≤ |
0.024 |
/ |
/ |
| Heavy Metal(Pb) % ≤ |
0.001 |
/ |
/ |
| Heavy Metal(AS) % ≤ |
0.0001 |
/ |
/ |
| Loss on Drying % ≤ |
0.5 |
0.5 |
/ |
| Residue % ≤ |
0.05 |
0.01 |
0.1 |
| p-Hydroxybenzoic Acid and Salicylic Acid ≤ |
qualified |
/ |
/ |
| Appearance of Solution |
/ |
/ |
Clear |
| Identification |
/ |
qualified |
/ |
| Organic Volatile impurities |
/ |
qualified |
/ |
| Related Substances |
/ |
/ |
qualified | |
| |
|