| Description |
A white, or almost white powder, free from grittiness, readily adhere to the skin, unctuous to the touch
|
Solubility |
Practically insoluble in water and in dilute solutions of acids and in alkali hydroxides
|
| Identification |
-
|
Identification 'A' ( by IR) |
It should shows absorption bands at 3677+2cm -1, 1018+2cm -1 and 669+ 2cm-1
|
| Identification 'B' |
A white crystalline precipitate should be formed
|
Identification 'C' |
Residue obtained in identification B, should gives the reaction of silicates
|
| Acidity or alkalinity |
The solution should required not more than 0.3 ml of 0.1M hydrochloric acid to make it acidic
|
Iron |
NMT 10 ppm
|
| Acid soluble matter |
Max 2.0%
|
Water soluble substances |
The residue weight should be maximum 10 mg
|
| Carbonate |
No effervescence should produced
|
Chloride (Cl) |
Max 250 ppm
|
| Organic compounds |
The residue obtained in the test for loss on drying should not more than slightly yellow or grey
|
Loss on drying (at 180°C; 1 hrs) |
Max 1.0%
|
| Microbial contamination |
The total aerobic viable count should not more than 103 CFU and total fungal count should not more than 102 CFU per g
|