The specification as below: Product name:St.John\**9;s Wort Extract Appearance:Black Brown fine Powder Assay(by UV):Hypericin â¥0.3% Ash:â¤3.0% Mesh Size: *0 mesh Loss On Dry:â¤5.0 Heavy metals:â¤*0ppm Pb:â¤2ppm As:â¤2ppm Hg:â¤0.*5ppm Cd:None Detection Residue on Ignition:E.P. Residue of pesticide:None Detection Total Plate Count:â¤***0cfu/g Yeast