|
Appearance
|
White to almost white powder
|
|
Assay (on dried basis)
|
98 - 102%
|
|
Solubility
|
Passes test
|
|
Identification as per BP, IP
|
Passes test
|
|
Melting range
|
148 - 151°C
|
|
Appearance of solution
|
Passes test
|
|
Residue on ignition
|
Max 0.1%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|
|
Gallic acid
|
Max 0.5%
|
|
Total chlorine (as Cl)
|
Max 0.02%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Zinc (Zn)
|
Max 0.0025%
|