| Description |
White or colourless crystals or a white crystalline powder
|
Solubility |
Freely soluble in water and slightly more soluble in boiling water; practically insoluble in ethanol
|
| Identification |
-
|
Identification 'A' |
It should give the reactions of chlorides
|
| Identification 'B' |
It should give the reactions of sodium salts
|
Appearance of solution |
Solution A should be clear and colourless
|
| Acidity or alkalinity |
Not more than 0.5 ml of 0.01 M hydrochloric acid or of 0.01 M sodium hydroxide should require to change the colour of the solution
|
Arsenic |
NMT 1 ppm
|
| Barium |
No turbidity should be produced within 2 hours
|
Bromide |
NMT 100 ppm
|
| Calcium & magnesium (as Ca) |
NMT 50 ppm
|
Ferrocyanide |
No blue colour should be produced within 10 minutes
|
| Iodide |
The substance should not shows blue colour after 5 minutes
|
Iron |
NMT 20 ppm
|