Acid Blue 25 (C20H13N2NaO5S) is an acid dye that is water-soluble and anionic and used for adsorption research.

[2] Acid Blue 25 is powder-like and poorly soluble in water.

The dye is soluble in solvents such as acetone and ethanol.

[2] Acid Blue 25 is used for dyeing wool, silk and mixed fabric and printing them in a direct method.

[2] The dye is extensively utilized to color leather, paper, cellulose, and PC blends during the manufacturing process.