Appearance： brown powder Test Method： HPLC Part of the Plant Used: Dry ripe fruit of Apium graveoleus L.var.dulce DC. Extract Method: Alcohol/water Applicable field：Medicine Assay： 50%，60%，95%，98%; 5：1，6:1,10：1 Active material: NBP Molecular Formula : C15H10O5 Molecular Weight: 270.25 Melting point: 347°C Solubility: Nearly insoluble in water, dissolve in hot alcohol partly, dissolve in KOH solution Packing: 25 kilograms / barrel Production method: Supercritical to extract precise oil, enclose with suitable bag mixture to make powder form products and then。 Particle size: 80 mesh Shelf Life : 2 years