Appearance White or off white powder Bulk density 0.10~0.20g/ml Particle size 98% pass through 60 mesh Loss on drying 2.0% max Ash content 2.0% max Betulinic Acid 98%min Heay metals 10ppm max Lead 3.0ppm max Arsenic 1.0ppm max Mercury 0.1ppm max Solvents residue Ethanol 5000ppm max Microbiological specifications Total Aerobic (cfu/g) 1000max Mold and Yeast (cfu/g) 100max Coliform Negative Salmonella Negative