As part of the EPA registration process, disinfectant products are put through rigorous testing to prove their efficacy and measure toxicity. The EPA registers three types of disinfectants: Limited, Broad, and Hospital. All three disinfectants destroy or irreversibly inactivate certain microorganisms on hard, inanimate surfaces and objects, however, hospital efficacy is the highest bar to clear because it requires killing the most difficult of bacteria.Disinfexol is a hospital-grade disinfectant. In addition, testing mandates that products be assigned to a toxicity category: The categories range from category 1 (highly toxic) to category 4 (no exposure warnings required on the label). Disinfexol received an EPA category 4 rating for all exposure routes with the exception of eye irritation if direct contact is made.