|
Appearance
|
A white powder
|
|
Assay (by HClO4 titration)
|
Min 99%
|
|
Specific optical rotation ([α]20/D)
|
6.3 – 7.3° (4% in water, at 20°C)
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Ammonium (NH4)
|
Max 0.1%
|
|
Foreign amino acids
|
Max 0.3%
|
|
Other ninhydrin positive substances (as glycine)
|
Max 0.1%
|