Which substance can be used to disinfect the face portion of an oxygen mask?

Using a mild antiseptic to disinfect the face portion of an oxygen mask is appropriate because it effectively eliminates most bacteria and viruses without being overly harsh on the material of the mask. Mild antiseptics are designed to maintain a balance between disinfection and preservation of the item being cleaned, ensuring that the integrity and comfort of the mask are not compromised.

In contrast, alcohol wipes can be too strong and may degrade certain types of materials used in the mask, while antibacterial sprays might not provide broad-spectrum disinfection. Bleach solutions, while effective in many disinfection scenarios, can be corrosive and damaging to the mask's surface, leading to deterioration and potential safety hazards. Therefore, a mild antiseptic is the best choice as it can safely clean the mask while ensuring its longevity and performance.