Which of the following is a common preservative used in embalming fluids?

Aldehydes are indeed commonly used as preservatives in embalming fluids, primarily due to their effectiveness in penetrating tissues and in stabilizing proteins. Formaldehyde, a specific type of aldehyde, is the most widely used embalming agent. It works by cross-linking proteins, which helps to preserve the body by preventing decomposition and minimizing the growth of bacteria.

In the context of embalming, preservatives play a critical role in maintaining the appearance and integrity of the deceased during the viewing and funeral services. Aldehydes are favored for their efficiency at lower concentrations, making them suitable for a wide range of embalming applications.

While alcohols, phenols, and esters are also relevant in the realm of embalming and funeral service for various reasons—such as disinfecting abilities or fragrance—none have the same level of prominence or effectiveness as preservatives when compared to aldehydes. Thus, aldehydes stand out as the main preservative used in embalming fluids.