| Description |
A fine, amorphous, impalpable, pink or reddish-brown powder
|
Solubility |
Practically completely soluble in mineral acids and insoluble in water
|
| Identification |
-
|
Identification 'A' |
Filtrate should give the reactions of zinc salts
|
| Identification 'B' |
A reddish colour should be produced
|
Acid insoluble substances |
NMT 1 % w/w
|
| Alkaline substances |
Not more than 0.2 ml of 0.05 M sulphuric acid is required to decolorize it
|
Water soluble dyes |
The filtrate should be colourless
|
| Ethanol soluble dyes |
The filtrate should be colourless
|
Arsenic |
NMT 8 ppm
|
| Lead |
The solution should remain clear for 5 minutes
|
Calcium |
The solution should remain clear
|
| Soluble barium salts |
The solution should remain clear
|
Chlorides |
NMT 750 ppm
|
| Microbial contamination |
1.0 g should free from Staphylococcus aureus and Pseudomonas aeruginosa
|
Assay |
98.0 – 100.5%
|