Which dehydrating agent is commonly used and listed among the commonly used dehydrating agents?

• A. Ethanol
• B. Ethyl Alcohol
• C. Methanol
• D. Isopropanol

Answer: (A)

In tissue processing, the dehydrating solvent must remove water while preserving structure and remaining compatible with the next steps. Ethanol, also called ethyl alcohol, is the most commonly used dehydrating agent because it mixes well with water and with typical clearing agents and embedding media, works effectively in a graded series to prevent abrupt shrinkage, and is readily available and cost-effective. Ethanol and ethyl alcohol are the same chemical, so that option reflects the standard dehydrant named in most protocols. While methanol is toxic and less favored for routine dehydration, and isopropanol can be used in some protocols, they are notAs universally listed as the primary dehydrants as ethanol is.