Both sterile and distilled water are fundamentally pure H2O, although their applications vary. Water distillate is disseminated for laboratory use and general consumption. The medical community uses sterile water as a wound cleaner and intravenous fluid.
Essentially, distilled water is water that has been purified by evaporation. Through condensation, steam is recaptured after evaporation and placed in a container. Since over 2,000 years ago, distillation has been employed to desalinate saltwater. The pH and osmolarity of sterile water used for medicinal purposes are quite specific. If these variables are not regulated, sterile water can be dangerous due to its extreme purity.