Embalming is the treatment of a dead body to slow decay and give it a lifelike appearance for viewing. The process involves replacing blood with preservative chemicals, treating internal organs, and applying cosmetics so the person looks natural during a funeral or visitation. It is not required by law in the United States, though many funeral homes present it as standard practice.
The Three Goals of Embalming
Embalming serves three distinct purposes: sanitation, preservation, and restoration. Sanitation means reducing the risk of infection from bacteria and other pathogens in the body. Preservation means slowing the natural decomposition process long enough for a multi-day funeral. Restoration means making the person look as close to their living appearance as possible, which is especially important for open-casket services.
A study published through the National Institutes of Health found that roughly 46% of cadavers carried drug-resistant organisms before embalming. The embalming process eliminated detectable microbes in about half of those bodies immediately. After an additional month of cold storage at around 4°C, over 90% showed no detectable bacterial growth. So while embalming doesn’t sterilize a body completely on its own, the combination of chemicals and refrigeration is highly effective at neutralizing infectious material.
How Arterial Embalming Works
The core of embalming is arterial injection, where preservative fluid is pumped into the body’s circulatory system while blood is drained out. The embalmer typically makes a small incision in the neck to access the carotid artery, though other arteries can be used. A catheter is inserted into the artery and connected to a pump that pushes embalming fluid through the vascular system. As the fluid flows in, it pushes blood out through a nearby vein.
This exchange is never perfectly clean. Blood that has partially clotted or begun to break down can be difficult and time-consuming to remove completely, which is one reason embalming requires significant skill. The fluid travels through the body’s network of blood vessels, reaching tissues throughout the arms, legs, torso, and head. The entire arterial phase typically takes a few hours depending on the body’s condition.
What Goes Into Embalming Fluid
Traditional embalming fluid is built around formaldehyde, the chemical that does the actual preserving. It works by bonding to proteins in tissue, which stiffens cells and makes them inhospitable to the bacteria that cause decomposition. In modern formulations, formaldehyde concentrations are relatively low, often between 1% and 2.2% of the total solution.
The rest of the fluid is a mix of supporting ingredients. Alcohol (typically methanol or ethanol) acts as a solvent and additional disinfectant. Glycerine, which appears in about two-thirds of embalming formulas, keeps tissues from drying out and becoming brittle. Water serves as the base carrier for the solution. Some formulas also include phenol (carbolic acid) as an extra antimicrobial agent. The proportions vary based on the condition of the body, the expected timeline before burial, and the embalmer’s judgment.
Cavity Embalming
Arterial embalming treats the tissues that blood vessels reach, but the organs in the chest and abdomen need separate treatment. This is cavity embalming. The embalmer makes a small incision near the bellybutton and inserts a long, hollow instrument called a trocar. Using the trocar, the organs in the chest and abdominal cavities are punctured and drained of gas and fluid. A concentrated formaldehyde-based solution is then injected directly into those cavities. The incision is closed afterward, and at that point the body is fully embalmed.
Cosmetic Restoration
The final stage is making the person look natural. This ranges from simple to complex depending on the circumstances of death. At the basic level, the embalmer sets the facial features: the mouth is closed and positioned, the eyes are shut, and the hands are arranged. Cosmetics are applied to restore natural skin tone, since embalming fluid can lighten or alter skin color.
For bodies that experienced trauma, disease, or significant weight loss, embalmers use restorative techniques. These can include prosthetic materials and specialized compounds to rebuild or reshape facial features, fill sunken areas, and mask visible damage. The goal is always the same: creating an appearance that feels familiar and peaceful to the family.
Embalming Is Not Legally Required
Federal law in the United States does not require embalming under any circumstances. The Federal Trade Commission’s Funeral Rule makes this explicit and requires funeral homes to disclose it on their General Price List. The required disclosure must state that embalming is not required by law and that families who don’t want it usually have the right to choose arrangements that don’t include it, such as direct cremation or immediate burial.
Funeral homes cannot charge for embalming without prior approval from a family member or authorized person. They also cannot claim that state or local law requires embalming if that isn’t true. In practice, embalming is most commonly expected when the family chooses an open-casket viewing. If you opt for a closed casket, direct cremation, or immediate burial, you can typically decline embalming entirely. Refrigeration is an accepted alternative for short-term preservation.
Alternatives to Traditional Embalming
Concerns about formaldehyde exposure and environmental impact have pushed the development of alternative preservation methods. One well-established option, Thiel’s solution, uses a blend of salts, ethanol, and glycerol with much lower formaldehyde levels than traditional fluid. It produces softer, more pliable tissue and reduces the chemical exposure risk for anyone handling the body.
Fully formaldehyde-free options also exist. One commercial product uses glutaraldehyde and quaternary ammonium compounds as its active preservatives. Alcohol-based solutions using ethanol or isopropanol are less pungent and pose fewer health risks than formaldehyde. Researchers have even explored essential oils (eucalyptus, thyme, lavender) and honey as natural preservatives, both of which can inhibit microbial growth with minimal health hazards, though these are more experimental and primarily studied in anatomical settings rather than funeral practice.
For families who want to avoid chemical preservation altogether, refrigeration, dry ice, and “green burial” practices that skip embalming entirely are increasingly available through funeral homes that specialize in natural or eco-friendly services.