Which class of chemicals is used as humectants in embalming fluids?

The use of polyhydric alcohols as humectants in embalming fluids is highly relevant due to their unique properties. Humectants are substances that help retain moisture and prevent dehydration in embalmed tissues. Polyhydric alcohols, such as glycerin and sorbitol, have multiple hydroxyl groups, which enhance their ability to attract and hold water molecules. This property is crucial in the embalming process, as it helps maintain tissue hydration and integrity.

In embalming, the primary goal is to preserve the body and prevent decomposition. By incorporating humectants like polyhydric alcohols into embalming fluids, embalmers can ensure that the tissues remain pliable and lifelike, which is essential for a natural appearance during viewings.

The other classes of chemicals mentioned—alcohols, aldehydes, and carboxylic acids—serve different roles in the embalming process. While some of these may contribute to preserving tissue, they do not have the same moisture-retaining qualities that are characteristic of polyhydric alcohols.