C3H7NO2 M.W. 89.09Assay (HCIO4 titration) min 99.0%Heavy metals(as Pb) max 0.001%Ammonium(NH4) max 0.01%Foreign amino acids max 0.3%Ninhydrine positivesubstances(as glycine) max 0.1%specifice rotation (a)20 +14o to +15o(Pyrogen free for bacteriology and tissue culture)(C=5 in HCL 1mol/litre)