In Masson's trichrome it is used as a counterstain to acid fuchsin.

Acid fuchsin is an acidic dye that has wide usage in histology.

Acid fuchsin is one of the dyes used in Masson's trichrome stain.

Van Gieson's Stain is a mixture of picric acid and acid fuchsin.

Solution A, also called plasma stain, contains acid fuchsin, Xylidine Ponceau, glacial acetic acid, and distilled water.

Red Dyes used: acid fuchsin, xylidine ponceau, chromotrope 2R, biebrich scarlet, ponceau 6R, phloxine.

The muscle stains red with the acid fuchsin, and the collagen is stained green or blue with light green SF yellowish or methyl blue.

Altmann also developed an histological stain that consists of picric acid, aniline, and acid fuchsin, and is used for staining mitochondria crimson against a yellow background.