Used primarily as a dye in industrial applications, especially for coloring oils, waxes, and greases. Commonly applied in the formulation of printing inks and carbon paper due to its strong staining properties. Also utilized in the detection of latent fingerprints, where it helps visualize prints on non-porous surfaces when suspended in powder or solution form. Its high solubility in organic solvents makes it suitable for use in solvent-based systems where water-soluble dyes are ineffective.