Acid Violet 90, like other acid dyes, has several applications in industries that involve dyeing and coloring various materials. Here are some common applications of Acid Violet 90:

1. Textile Industry: Acid Violet 90 is widely used for dyeing protein-based fibers such as wool and silk. It can produce vibrant purple or violet shades and is known for its good colorfastness properties on these materials. The dye is often used for dyeing yarns, fabrics, and garments.

2. Leather Industry: Acid Violet 90 is also employed in the leather industry for dyeing and tinting leather products such as shoes, bags, belts, and upholstery. It provides a range of purple hues both as solid colors and for creating attractive color effects.

3. Paper Industry: Acid Violet 90 can be used in the paper industry for coloring paper and paper products. It adds a purple tint and can be used for decorative purposes, stationery, and artistic applications.

4. Plastics Industry: Acid Violet 90 may find application in coloring certain types of plastics. It can be used in the production of plastic products, including toys, packaging materials, and household items, to achieve desired purple shades.