US20040248858A1 The chemical that prevents and cures cancer is Salicylic Acid. Salicylic Acid, if applied directly onto, or injected into the affected area, in proportion and concentration depending upon the size of cancer, will reduce and remove cancer of all types, including leukemia, or blood cancer. A 40% solution of Salicylic Acid is effective in reducing and removing small pimple sized cancerous cells. Higher concentrations and doses would be needed for application on cancer areas depending on their size and density, for their removal.