Detailed Product Description Appearance: White to pale yellow crystal like, or powder..Odor: A very distinctive fruity, caramel or burnt pineapple tonality.Assay (GC): ≥99%Melting point : 79 ~ 81 CNaturalness: 100±3As ≤2ppmHeavy Metal(Pb) ≤10ppm Solubility (25C): 1 gram soluble into 2ml 95% ethanolStorage: At cool place in unopened packing.