Gomori aldehyde fuchsin solution contains which components?

• A. Basic fuchsin, hydrochloric acid, and paraldehyde
• B. Methylene blue, acetic acid, and water
• C. Sodium thiosulfate and sulfuric acid
• D. Aniline blue and ferric chloride

Answer: (A)

Gomori aldehyde fuchsin is a staining reagent where the active dye is basic fuchsin used in an acidic medium. The acid, provided by hydrochloric acid, helps convert the dye into its aldehyde-reactive form so it binds selectively to aldehyde-containing structures in the tissue. Paraldehyde is included as a fixative/modifier to stabilize the aldehyde groups and support consistent staining. Together, basic fuchsin, hydrochloric acid, and paraldehyde form the Gomori aldehyde fuchsin solution.