1 | Description | White, odorless, hygroscopic, crystalline powder. | White, odorless or almost odorless, hygroscopic, crystalline powder. |
2 | Solubility | Passes | Freely soluble in water; slightly soluble in methanol; practically insoluble in acetone, in dehydrated alcohol, and in benzene. |
3 | Identification (for calcium) | Complies | A white precipitate which is insoluble in 6N acetic acid but dissolves in hydrochloric acid should form. |
4 | Identification (Acetate 1) | Complies | A dark color develops or a blue precipitate should form. |
5 | Identification (Acetate 2) | Complies | A red color that destroyed by addition of mineral acid shall form. |
6 | Assay (Anhydrous basis) | 99.4% | 99.0% - 100.5% |
7 | Arsenic(As) | Less than 3ppm | NMT 3ppm |
8 | Chloride (Cl) | Less than 0.05% | NMT 0.05% |
9 | Sulphate(SO4) | Less than 0.06% | NMT 0.06% |
10 | Fluoride(F) | 25ppm | NMT 50ppm |
11 | Nitrate(NO3) | Passes | The blue color persists for NLT 10 min. |
12 | Readily oxidizable substances | Passes | The pink color in the supernatant should not be completely discharge. |
13 | pH | 7.57 | 6.3 - 9.6 |
14 | Water | 6.8% | NMT 7.0% |
15 | Lead (Pb) | Less than 10ppm | NMT 10ppm |