What substance is commonly used for embalming?

Formaldehyde is the substance commonly used for embalming due to its effectiveness as a preservative and disinfectant. When injected into the body, formaldehyde helps to slow down the decomposition process by cross-linking proteins, which stabilizes the tissues and reduces the chances of bacteria growth.

This substance acts as a powerful antimicrobial agent, making it crucial in funerary practices to maintain the appearance and condition of the body for viewings and services. Formaldehyde solutions are typically used in combination with other chemicals to balance preservation, coloring, and odor control, enhancing the overall embalming process.

Other substances listed, while they may have various uses in other contexts, do not fulfill the specific role that formaldehyde plays in embalming. Ethyl alcohol is primarily used in disinfectants and as an antiseptic. Acetone is commonly used as a solvent and for cleaning purposes, not for preservation. Ammonia may serve as a cleaning agent but lacks the properties necessary for effective embalming. Thus, formaldehyde's unique qualities make it the primary choice for this essential practice in funeral services.