| 1 | Description | White, odorless, crystaline powder. | White, odorless ,crystalline powder. | USP |
| 2 | Solubility | Complies | Soluble in dilute mineral acids; slightly soluble in boiling water; very slightly soluble in alcohol and in cold water, practically insoluble in ether and in chloroform. | USP |
| 3 | Identification A (Calcium) | Complies | A white precipitate, which should be insoluble in 6N acetic acid but soluble in hydrochloric acid | USP |
| 4 | Identification B (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the corresponding standard. | USP |
| 5 | Assay | 99.74% | 98.5% w/w - 102.0% w/w as C6H8CaO8. 4H2O | USP |
| 6 | chloride | Less than 0.07% | NMT 0.07% | USP |
| 7 | Sulfate | Less than 0.12% | NMT 0.12% | USP |
| 8 | Sucrose and reducing sugars | Complies | No red precipitate should form immediately. | USP |
| 9 | Specific rotation | +19.49° | +18.5° to + 22.5° | USP |