APPEARANCE: WHITE CRYSTAL POWDERS ASSAY: 99.0% SPECIFIC ROTATION: -1.6_-2.6 FUMARIC ACID: 0.1% MALEIC ACID: 0.05% H EAVY METALS(AS PB): 0.002%MAX ARSENIC: 0.0002%MAX RESIDUE ON IGNITION: 0.10%MAX CLARITY: QUALIFIED