items | Specifications | |
Characters | White or almost white, crystal powder | |
Identification | A | violet-red color is produced |
B | Melting point of salicylic acid 156℃-161℃ | |
Appearance of solution | Clear and colorless | |
Heavy metals | ≤20ppm | |
Loss on drying | ≤0.5% | |
Sulfate ash | ≤0.1% | |
Related substances impurity A | ≤0.15% | |
Impurity B | ≤0.15% | |
Impurity C | ≤0.15% | |
Impurity D | ≤0.15% | |
Impurity E | ≤0.15% | |
Impurity F | ≤0.15% | |
Unspecified impurity | ≤0.05% | |
Total impurity | ≤0.25% | |
Assay(on dried basis ) | 99.5%-101.0% |