| Description |
A fine, heavy, white powder, free from gritty particles; odourless.
|
Identification |
-
|
| Identification 'A' |
The solution gives the reactions of sulphates
|
Identification 'B' |
A white precipitate is formed which is insoluble in dilute sodium hydroxide solution
|
| Acidity or alkalinity |
Not more than 0.5 ml of 0.01 M hydrochloric acid or of 0.01 M sodium hydroxide is required to change the colour of the solution
|
Arsenic |
NMT 2 ppm
|
| Heavy metals |
NMT 10 ppm
|
Loss on ignition (at 600°C) |
NMT 2.5%
|
| Soluble barium salts |
No turbidity is produced within 30 minutes
|