Chemical name: N-a-aspartyl-L-phenylalanine-menthylester Molecular Formula: C14H18N2O5 Molecular Weight:294.31 Appearance White crystal or crystalline powder Purity(on dry basis) 98 102% PH 4.5 6.0 Specific rotation +14.5 +16.5 Residue on ignition(sulfate) ≤0.2% Sulfate ≤0.075% Transmittance >95% Heavy metals(pb) ≤10ppm Arsenic(As) ≤3ppm Related impurity ≤2%