Potassium
Iodide BP/USP Granular
Synonyms Potassium iodide |
| |
| Chemical
Formula |
KI |
|
| |
| Molecular
Weight |
214.01 |
|
| Potassium (K) |
23.55% |
|
| Iodide (I) |
76.45% |
|
| |
| Physical
Properties |
| Melting point |
686 degrees
C |
| Boiling point |
1330 Degrees
C |
| Heat of vaporization |
224.1 g-cal/g |
| pH (1 in 20
solution) |
6 - 10 |
| Specific gravity |
3.13 |
| Refractive index |
1.677 |
| |
| Solubility |
| Potassium
iodide is very soluble in water and ammonia solutions.
The following are some guidelines: |
127.5g dissolves in 100g
water @ 0 degrees C
208g dissolves in 100g water @ 100 degrees C
1.88g dissolves in 100ml alcohol @ 25 degrees C
1.31g dissolves in 100ml acetone @ 25 degrees C
1g dissolves in 8 ml methanol
1g dissolves in 2ml glycerol
1g dissolves in 2.5ml glycol |
| It is slightly soluble
in ether. Water solutions of potassium iodide readily
dissolves elemental iodide |
| |
| Typical
Properties |
| Identification |
Passes test |
| Loss on drying |
0.05% |
| Iodates |
<4 ppm |
| Thiosulfate & barium |
Passes test |
| Thiosulfate |
Passes test |
| Alkalinity |
Passes test |
| Nitrate, nitrite, ammonia |
to pass test |
| Heavy metals |
6 ppm |
| Iron |
4 ppm |
| Sulfate |
0.002% |
| Assay |
99.0% - 100.5% |
| Loose bulk |
9 fl. oz. /LB |
| Tapped bulk |
9 fl. oz. /LB |
| Organic volatile impurities |
Negative |
| |
| |
| |
