Formaldehyde is a common preservative used in the embalming process, and it can preserve a body effectively for many years. In a typical embalming procedure, a formaldehyde solution is injected into the body to slow down the decomposition process by killing bacteria and other microorganisms.
The duration of preservation largely depends on various factors, including the concentration of formaldehyde used, the embalming technique, environmental conditions, and the overall condition of the body at the time of embalming.
Generally, a properly embalmed body can be preserved for several months to several years, especially if kept in a controlled environment. However, it’s important to note that preservation does not mean the body is entirely immune to decomposition; eventually, even embalmed bodies can start to break down, especially if not stored correctly.
In summary, while formaldehyde is an effective preservative that can last for a long time, the exact duration of preservation can vary based on multiple factors.