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% |
