Appearance White Crystal or CrystalerPurity (on dry basis) 98.0 % ~ 102.0%Loss on Drying (105°C 4hr) = 4.5%Residue on Ignition (sulfate) = 0.2%4.5 ~ 6.0Specific Rotation +14.5° ~ +16.5°Arsenic = 3mg/kgHeavy Metals (as Pb) = 10mg/kgTransmittance = 0.95Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in foods and beverages. Aspartame is approximately 200 times sweeter than sucrose (table sugar). The taste of aspartame and other artificial sweeteners differs from that of table sugar in the times of onset and how long the sweetness lasts. The sweetness of aspartame lasts longer than that of sucrose, and it is often blended with other artificial sweeteners such as acesulfame potassium to produce an overall taste more like sugar.