
Item | Specification |
Appearance | White or slightly yellowish, crystalline powder or flakes. |
Identification | Melting point: 99-102℃ |
UV: The solution shows an absorption maximum at 232nm and 275nm. The specific absorption at the 232nm is 525 to 575. | |
IR: The sample spectrum complies with that of the reference standard spectrum. | |
Reaction of primary aromatic amines: The sample solution gives the reaction of primary aromatic amines. | |
Appearance of solubility | The solution is not more than opalescent than reference suspension II.The solution is not more intensely coloured than reference solution GY3. |
Related substances | Impurity A ≤0.1% Impurity B ≤0.1% Impurity C ≤0.1% Any other impurity ≤0.1% Total impurity ≤0.2% |
Loss on drying | ≤0.5% |
Sulphated ash | ≤0.1% |
Assay | 98.5-101.0% on dried substance |