| Description |
Colorless crystals or a white, crystalline powder
|
Solubility |
Freely soluble in water, practically insoluble in ethanol and in ether
|
| Identification |
The solution should give the reactions of potassium salts and of chlorides
|
Appearance of solution |
Solution A should be clear and colorless
|
| Acidity or alkalinity |
Not more than 0.5 ml of 0.01 M sodium hydroxide or 0.01 M hydrochloric acid should be required for neutralization to bromothymol blue solution
|
Arsenic |
NMT 1 ppm
|
| Barium |
The solution, after not less than 15 minutes should not be more opalescent than a mixture of 5 ml of solution A and 6 ml of water
|
Calcium & magnesium |
The solution remains clear
|
| Iodides |
The substance shows no blue colour after 5 minutes.
|
Sulphates |
NMT 300 ppm
|