Which agent cannot be used to disinfect metallic surfaces in the clinical environment?

Sodium hypochlorite solution, commonly known as bleach, is effective as a disinfectant but is not recommended for use on metallic surfaces due to its corrosive properties. It can lead to rusting and degradation of the metal over time, which compromises the integrity and safety of the instruments.

In contrast, aldehyde solutions, such as formaldehyde, are suitable for disinfecting metal surfaces within a controlled environment as they do not exhibit the same corrosive effects. Chlorhexidine gluconate is generally used as an antiseptic and is compatible with metal surfaces. Viricidal wipes are designed to clean and disinfect surfaces effectively without harming the material, making them appropriate for use on metals. Therefore, sodium hypochlorite's corrosiveness makes it unsuitable for disinfecting metallic surfaces in a clinical setting.