Which property is NOT ideal for skin antiseptics?

The characteristic that is not ideal for skin antiseptics is fast systemic absorption. Skin antiseptics are designed to act locally on the surface of the skin to eliminate pathogens and reduce the risk of infection. Ideally, these substances should remain on the skin's surface to provide a protective barrier and ensure their effectiveness against microorganisms. If a skin antiseptic is absorbed rapidly into the bloodstream, it may not provide the desired antimicrobial action at the site of application and could potentially lead to systemic effects or toxicity, which would compromise safety and efficacy.

Broad spectrum, being non-irritating, and having residual properties are all desirable attributes for skin antiseptics. A broad spectrum ensures the antiseptic is effective against a wide range of bacteria, viruses, and fungi. Non-irritating properties help to minimize discomfort or adverse reactions, making the antiseptic more suitable for frequent use on the skin. Residual properties enable the antiseptic to remain active for an extended period, providing ongoing protection even after initial application. These factors contribute to a more effective and safe antiseptic for skin preparation and infection control.