Which substance should not be used as an antiseptic for venipuncture?

Povidone-iodine is a widely used antiseptic that provides broad-spectrum antimicrobial activity. It is effective against bacteria, viruses, and fungi, making it suitable for skin disinfection before venipuncture procedures. Its antiseptic properties help to significantly reduce the risk of infection.

Chlorhexidine is another effective antiseptic that is commonly used for skin preparation before medical procedures, including venipuncture. It has long-lasting antimicrobial effects and is known for its efficacy in reducing skin flora, thereby lowering the chance of infection at the puncture site.

70% isopropyl alcohol is a well-known antiseptic used to disinfect skin before venipuncture. It effectively kills a wide range of microorganisms and is quick to evaporate, making it suitable for use in clinical settings. Its effectiveness as an antiseptic makes it a standard choice for skin preparation.