D-Pyroglutamic acid

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%