Product Details : Structural formula: Specification: Appearance: White columnar crystal Puerarin: ≥99.5% Melting point: L87 centigrade to l88 centigrade Ignition residue: ≤1% Loss on drying: ≤1.0% Heavy metal: <5ppm Pathogen: <300CPU, Salmonella or Escherichia coli should not be detected. Mold: <100CPU Packaging: 0.5kg/bags 1kg/bags.