Acid Red Dyes

About Acid Red Dyes

Acid Red Dyes

Acid Red dyes are a group of water-soluble anionic dyes (mostly azo-based) used widely in textiles, food colours (specific grades), cosmetics, and industrial applications. They are called "acid dyes because they are applied in an acidic dye bath.

Appearance & Forms

• Fine red to dark red powder or granules
• Easily soluble in water
• Available as powder, liquid, or paste

Applications

1. Textile Applications

• Wool, silk, nylon dyeing
• Carpet and fabric coloration
• Leather dyeing

2. Food & Cosmetic Uses (Specific Grades Only)

• Some Acid Red dyes are approved as food colors, e.g.:
  • Ponceau 4R (Acid Red 18)
  • Carmoisine (E122)

Used in beverages, candies, bakery, cosmetics

3. Industrial Applications

• Printing inks
• Paper & leather coloring
• Soaps & detergents
• Plastics and coatings

4. Laboratory & Special Uses

• Biological staining (microscopy)
• Chemical indicators
• Analytical applications

Key Characteristics

• Water-soluble
• Applied in acidic medium (pH 26)
• Bright, strong red shades
• Good affinity for protein Fibers
• Moderate to good fastness