Features Specifications:L-Glutamine   Test Items Standard Results Appearance Crystalline powder Crystalline powder Color Whitish Whitish Aroma None None Flavor Slightly sweet Slightly sweet Assay 98.5-101.5% 99.0% PH 4.5∼6.0 5.02 Heavy metals(Pb) ≤5ppm Arsenic(As2o3) ≤1ppm Loss on drying ≤0.20% 0.08% Residue on ignition ≤0.10% 0.03%