Used primarily as a dye in industrial applications, especially in the coloring of oils, waxes, and greases. Commonly applied in the formulation of printing inks and carbon paper due to its strong staining properties and solubility in non-polar solvents. Also utilized in the detection of latent fingerprints in forensic science, where it helps visualize prints on non-porous surfaces when suspended in appropriate carriers. Its high contrast and stability make it suitable for marking and identification purposes in automotive and machinery lubricants.