Dioxane is a reagent that can be used

• A. For staining
• B. For both dehydrating and clearing tissues
• C. As a fixative
• D. As a mounting medium

Answer: (B)

Dioxane functions as a transitional solvent in tissue processing because it is miscible with both water and paraffin. This allows it to replace water during dehydration and then mix with embedding medium to enable paraffin infiltration, effectively serving as both a dehydrating and a clearing agent. It is not used for staining, does not act as a fixative, and is not a mounting medium. (Note: due to toxicity, its use has declined in favor of safer alternatives.)