Which dilution of hydrogen peroxide would not be considered a broad spectrum and sporicidal disinfectant?

The dilution of hydrogen peroxide that would not be considered a broad-spectrum and sporicidal disinfectant is 0.5 percent. At this concentration, hydrogen peroxide is typically not effective against a wide variety of microorganisms, including bacteria, viruses, and fungi, and does not possess the necessary strength for sporicidal action.

In contrast, higher concentrations, such as 3 percent, 30 percent, and even higher dilutions, are known for their efficacy as disinfectants. These higher concentrations can effectively kill a broader range of pathogens, including spores, which require stronger agents for their inactivation. Thus, a dilution of 0.5 percent does not provide the necessary potency for disinfection practices, making it unsuitable for applications requiring broad-spectrum and sporicidal efficacy.