|
Appearance
|
White crystalline powder.
|
|
Assay (by HClO4 titration)
|
Min 99%
|
|
Specific optical rotation ([α]20/D; c=4 in 6 M HCl; on dried substance)
|
+14.9 to +16.50 deg
|
|
pH (1% solution)
|
5.5 - 7.0
|
|
Appearance of solution
|
Passes test
|
|
Insoluble matter in HCl 1 mol/L
|
Passes test
|
|
Loss on drying (at 105°C)
|
Max 0.2%
|
|
Residue on ignition (as SO4)
|
Max 0.1%
|
|
Chloride (Cl)
|
Max 0.05%
|
|
Sulphate (SO4)
|
Max 0.03%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Ammonium (NH4)
|
Max 0.02%
|
|
Foreign amino acids
|
Max 0.3%
|
|
Other ninhydrin positive substances (as glycine)
|
Max 0.1%
|