|
Appearance
|
White powder
|
|
Assay (by HClO4 titration)
|
Min 99%
|
|
Specific optical rotation ([α]20/D; 40 g/L 6M HCl; on dried substance)
|
+40 to +43 deg
|
|
Specific optical rotation ([α]25/D; 40 g/L in 6M HCl; on dried substance)
|
+38.9 to +41.8 deg
|
|
pH (1% solution in CO2 free water)
|
5.5 - 7.0
|
|
Chloride (Cl)
|
Max 0.02%
|
|
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 0.5%
|
|
Other ninhydrin positive substances (as glycine)
|
Max 0.1%
|