CAS number: 5749-67-7
Molecular formula: C₁₉H₁₈CaN₂O₉
molecular weight: 458.064
Chemical structure:
Testing Items | Testing Specifications | Testing Results |
Appearance | White or off-white, crystalline powder. | White, crystalline |
Identification | A. Absorption maxima at 228nm and 276nm, specify absorbance should be 363 to 379 at 228nm and 49 to 53 at 276nm. | Complies |
B. Infrared spectrum should correspond to reference spectrum of Carbasalate Calcium | ||
C. The solution gives reaction of Salicylates | ||
D. Heat sample with sodium hydroxide, a colour yellow or yellowish-brown,is produced and the vapour turns red litmus paper blue. | ||
E. It gives the reaction of Calcium | ||
Appearance of Solution | Colourless or not more opalescent than reference suspension II . | Complies |
Related substances | Impurity C should not more than 0.5% | 0.34% |
Impurity B should not more than 0.15% | 0.01% | |
Any unspecified impurities should not more than 0.05% | LTDL | |
Total impurities should not more than 0.7% | 0.35% | |
Heavy Metals | Not more than 10ppm | Complies |
Water | Should not more than 0.1% | 0.04% |
Assay | Contain Carbasalate Calcium 99.0%-101.0% calculated on the anhydrous basis. | 100.10% |