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Item
Standard
Appearance
White crystals with lumps
Specific rotation[α]D/20
(C=2 in H2O)
+10.8°to +12.3°
Melting Point (ºC)
160 to 163 ºC
Chloride(C1)
Not more than 0.02%
Iron(Fe)
Not more than 10ppm
Heavy metals(Pb)
Not more than 10ppm
Arsenic(As2O3)
Not more than 1ppm
Loss on drying
Not more than 0.20%
Residue on ignition
Not more than 0.10%
Assay
98.0%¡«101.0%
D-Pyroglutamic acid