|
Description
|
Colourless crystal or a white powder, odourless
|
|
Identification
|
The solution gives the reactions of potassium salts and of iodides
|
|
Appearance of solution
|
The solution is clear and colorless
|
|
Alkalinity
|
No colour is produced
|
|
Arsenic
|
NMT 2 ppm
|
|
Heavy metals
|
NMT 10 ppm
|
|
Iron
|
NMT 20 ppm
|
|
Barium
|
No turbidity develops within one minute
|
|
Cyanide
|
No blue colour is produced
|
|
Iodate
|
No blue colour is produced within 2 minutes
|
|
Sulphates
|
NMT 150 ppm
|
|
Thiosulphate
|
A blue colour is produced
|
|
Loss on drying (1 g, 105°C, 3 hrs)
|
NMT 1.0%
|
|
Assay
|
99.0% to 100.5% of KI, calculated on the dried basis
|