|
Appearance
|
White or almost white crystalline powder
|
|
Assay (by HClO4 titration)
|
Min 99%
|
|
Specific optical rotation ([α]20/D; 20 g/L; water; calculated on dried substances)
|
-33.0° to -34.7°
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Ammonium (NH4)
|
Max 0.01%
|
|
Foreign amino acids
|
Max 0.3%
|
|
Other ninhydrin positive substances (as glycine)
|
Max 0.1%
|