| 1 | Description | White, odorless hygroscopic, crystalline powder. | White, odorless or almost odorless, hygroscopic, crystalline powder. | USP |
| 2 | Solubility | Complies | Freely soluble in water; slightly soluble in methanol; practically insoluble in acetone, in dehydrated alcohol, and in benzene. | USP |
| 3 | Identification ( For calcium) | Complies | A white precipitate which is insoluble in 6 N acetic acid but dissolve in hydrochloric acid should form. | USP |
| 4 | Identification ( For Acetate 1) | Complies | A dark colour develops or a blue precipitate should form. | USP |
| 5 | Identification ( For Acetate 2) | Complies | A red colour that destroyed or a blue precipitate should form. | USP |
| 6 | Assay (Anhydrous basis) | 99.93% | 99.0% - 100.5% | USP |
| 7 | Arsenic (As) | Less than 3 ppm | NMT 3ppm | USP |
| 8 | Chloride (Cl) | Less than 0.05% | NMT 0.05% | USP |
| 9 | Sulphate (SO4) | Less than 0.06% | NMT 0.06% | USP |
| 10 | Fluoride(F) | 27 ppm | NMT 50ppm | USP |
| 11 | Nitrate (NO3) | Complies | The blue color persists for NLT 10 min. | USP |
| 12 | Readily oxidizable substances | Complies | The pink colour in the supernatant is not completely discharged. | USP |
| 13 | pH | 7.64 | 6.3 - 9.6 | USP |
| 14 | Water | 5.89% | NMT 7.0% | USP |
| 15 | Appearance of solution | Complies | The sample solution should be clear and colourless. | USP |
| 16 | Total aerobic microbial count | Less than 1000 CFU/gm | NMT 1000 CFU/gm | In-house |
| 17 | Total Yeast and mold count | Less than 100 CFU/gm | NMT 100 CFU/gm | In-house |
| 18 | E.coli | Absent/gm | Should be absent/gm | In-house |
| 19 | Bacterial endotoxins test | Less than 0.1 Eu/mg | Less than 0.1 Eu/mg | In-house |