... :AJI97.ItemSpecification (AJI97)AppearanceWhite crystalline powderAssay, % (on dry matter)99.0~101.0Specific optical rotation+14.4º~+15.5ºTransmittance,%≥98 ... .2Loss on drying, %≤0.2Heavy metals, %≤0.001Residue on ignition, %≤0.1Chloride,%≤0.02Sulfate,%≤0.02Iron, %≤0.001Arsenic, %≤0.0001Ammonium (as NH+4), %≤0.02Other amino acidsNot detd ...