Appearance Yellow or light yellow sheet, one side has a certain gloss, odorless tasteless, insoluble in water or ethanol,soluble in 80-92% ethanol or 70-80% acetone. Identification Positive Assay, on dry basis(as Nitrogen content) 14.0%min Ether insoluble material 2.0% max Loss on drying 10.0% max Residue on ignition 0.3% max Hevy metals Complies Microbe limit Bacterial:1000/G max Fungi:100/G max Escherichia: N.D