Define "embalming chemical index."

The term "embalming chemical index" specifically refers to the measure of the concentration of formaldehyde in embalming fluids. This index is crucial because formaldehyde acts as a preservative, and its concentration directly affects the effectiveness of the embalming process. Understanding this index helps morticians determine how much embalming fluid to use and what kind of effects to expect, ensuring that the body is properly preserved.

The other options do not accurately reflect the definition of "embalming chemical index." While factors like storage temperature and expiration dates are important for the efficacy and safety of embalming chemicals, they do not describe the index itself. Likewise, guidelines for application relate more to techniques rather than the specific composition or measurement of embalming fluids.