Aspartame: ItemSpecificationResultAppearanceWhitegranularorpowderWhitepowderAssay(OnDryBasis)98.00%-102.00%99.91%TastePurePureSpecificRotation+14.50-+16.50°+15.31°Transmittance≥95.0%98.50%LossonDrying4.5%4.03%ResidueonIgnition0.20%0.11%L-a-Asparty-L-Phenylalanine0.25%<0.25%PH4.50-6.505.09OrganicVolatileImpuritiesConformtoUSPConformL-Phenylalanine0.50%<0.50%HeavyMetals(asPb)10ppm<10ppmArsenic(As)3ppm<3ppm5-Benzyi-3,6-Dioxo-2-PiperazineaceticAcid1.5%<1.5%OtherRelatedSubstance2.0%<2.0%ShelfLife--4years