| Description |
A soft, white or faintly yellowish white amorphous powder, free from grittiness
|
Identification |
-
|
| Identification 'A' |
It becomes yellow when strongly heated; the yellow colour disappears on cooling
|
Identification 'B' |
The solution gives the reactions of zinc salts
|
| Alkalinity |
NMT 0.3 ml of 0.1 M hydrochloric acid is required to discharge the colour
|
Carbonate and substances insoluble in acids |
No effervescence is produced and the solution is not more opalescent than opalescence standard OS2, and colourless
|
| Lead |
The solution remains clear
|
Loss on ignition (at 500°C) |
NMT 1.0%
|
| Assay |
NLT 99.0% and NMT 100.5% of ZnO, calculated in ignited basis
|