1 | Description | Colorless, odorless, deliquescent crystals, which lose water when heated to 100°C and lose hydrochloric acid when heated to 110°C | Colorless, odorless, deliquescent flakes or crystals, which lose water when heated to 100°C and lose hydrochloric acid when heated to 110°C |
2 | Solubility | Passes | Very soluble in water; freely soluble in alcohol. |
3 | Identification (By Water) | 51.4% | 51.0% - 55.0% |
4 | Identification (Magnesium 1) | Complies | A white crystalline precipitate which insoluble in 6N ammonium hydroxide should form |
5 | Identification (Magnesium 2) | Complies | A bright red turbidity should produce which gradually settles to give a bright red precipitate. |
6 | Identification (Chloride) | Complies | A curdy white precipitate that insoluble in nitric acid but soluble in a slight excess 6N ammonium hydroxide should form |
7 | Assay | 99.7% | 98.0%- 101.0% |
8 | Insoluble matter | 0.003% | NMT 0.005% |
9 | Appearance of solution | Passes | Clear and colorless solution. |
10 | Sulphate (SO4) | Less than 0.005% | 0.005% max |
11 | Barium(Ba) | Passes | No turbidity should produce within 2 hrs. |
12 | Calcium (Ca) | Not detected | NMT 0.01% |
13 | Potassium (K) | Passes | No turbidity should produce within 5 min. |
14 | Bromide (Br) | Less than 500 ppm | 500 ppm max |
15 | Arsenic (As) | Less than 2 ppm | 2 ppm max |
16 | Iron (Fe) | Less than 10 ppm | 10 ppm max |
17 | pH | 5.81 | 4.5-7.0 |
18 | Acidity & alkalinity | Passes | Not more than 0.3ml of either 0.01M hydrochloric acid or 0.01M sodium hydroxide should require to change the colour of the indicator. |
19 | Water | 51.4% | 51.0% - 55.0% |