Description Rennin (Chymosin), from Calf Stomach, Lyophilized Powder, Certified, 25g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: % Protein (Biuret) 40+% Units/mg protein 20+ One unit will coagulate 10 ml of milk per minute at 30 deg C CAS: 9001-98-3 FORMULA: N/A