One chemical method of sterilizing and eliminating sexuality in male mammals is biological sterilization of talented male mammals, sheep, goats, horses, pigs, dogs, cats and humans. The invention is a sterile aqueous solution containing active hardening (lactate) and enzyme (papaina). Enzymes cause digestion of testicular tissueMake the necrosis of acid aggravate and make it work faster and more effectively. Combining these two positive principles can lead to acute inflammation and rapid resolution characterized by organ fibrosis. This result led to deformation and the loss of robot function, and resulted in infertility and extinction of Libyans, respectively. Biological disinfection is easy to carry out, does not need additional treatment, requires less animal management, less pressure, and weight gain. This process will not be painful, either during or after the administration of the government.Because of the damage of testicular nerve endings in application, and the fact that the largest number of sensitive structures appear in the scrotum. There is no need to wait for a period of time between the application and sacrifice of such processed livestock meat, because the principle of biological activity is easily metabolized by animals. More than 3000 animals have successfully used this method, which is currently the only one that uses the principle of natural biological activity.Un método químico para esterilización sexual y eliminación de libido en mamíferos machos se indica para lograr la esterilización biológica de mamíferos machos talescomo bovinos, ovejas, cabras, equinos, cerdos, perros, gatos, y humanos. La invención consiste en una solución acuosa estéril que contiene un principio esclerosante activo (ácido láctico) y una enzima (papaína). La enzima causa digestión del tejido del testículo, intensificando el efecto necrosante del ácido y causando que actúe más rápido y más eficientemente. La asociación de estos dos principios activos provoca una reacción in