Description_x000D_ General description_x000D_ Crystal violet, also known as gentian violet, is a protein dye and is basic in nature. It stains the fatty portions of sebaceous sweat a deep purple color. Crystal violet can also be used to enhance bloody fingerprints. This dye is harmful if inhaled, swallowed or absorbed through skin, contact may cause cancer, severe eye irritation in human beings._x000D_ Application_x000D_ Crystal violet solution for use in Brown-Hopps method for Gram-positive and Gram-negative bacterial staining._x000D_ Crystal violet solution has been used as a stain in cell proliferation assays, migration assays and Boyden chamber assay.