Solvent Red 24

Solvent Red 24 (C.I. 26105) is a high-performance monoazo solvent dye extensively used in the plastics, coatings, and ink industries due to its superior solubility in organic solvents and non-polar systems. This vibrant red dye is characterized by its excellent thermal stability, high lightfastness, and strong resistance to migration, making it an ideal choice for demanding industrial applications. Solvent Red 24 exhibits a strong affinity for polymeric substrates and is commonly used in processes such as solvent dyeing and coloration of synthetic materials.

Chemical and Technical Specifications:

• Chemical Name: 1-[(2-Methoxyphenyl)azo]-2-naphthol

• Chemical Structure: C24H20N4O

• C.I. Number: 26105

• CAS Number: 85-83-6

• Molecular Weight: 380.44 g/mol

• Melting Point: 190-193°C

• Solubility: Soluble in hydrocarbons (toluene, xylene), acetone, ethyl acetate, and other organic solvents

• Lightfastness (Blue Wool Scale): 6-7 (excellent resistance to fading under UV exposure)

• Heat Stability: Stable up to 200°C, suitable for high-temperature industrial processes

• Migration Resistance: High, especially in polyolefin systems

• Color Index: Bright, intense red with high tinting strength

• Appearance: Red powder

• pH Stability: Stable across a wide pH range (4-9)

Industrial Applications:

1. Plastics Industry:
   Solvent Red 24 is widely utilized in the coloration of polymers, including polystyrene, polyethylene, and PVC. Its excellent compatibility with plastic matrices and high migration resistance make it suitable for producing stable, long-lasting colors in both rigid and flexible plastic products. It is particularly favored in the production of masterbatches and plastic films.

2. Inks and Coatings:
   This dye is a key component in the formulation of solvent-based inks, providing vivid red hues with outstanding solvent fastness and thermal stability. It is also used in automotive and industrial coatings due to its ability to withstand harsh environmental conditions and high temperatures, ensuring the durability and aesthetic quality of the finish.

3. Synthetic Fibers:
   Solvent Red 24 can be used to dye synthetic fibers, such as polyamide and polyester, through solvent-based dyeing processes. Its non-polar characteristics provide excellent penetration into the fiber structure, resulting in deep, vibrant colors with exceptional fastness properties.

4. Lubricants and Fuels:
   In the petroleum industry, Solvent Red 24 is used as a marker dye in fuels and lubricants. Its high solubility in hydrocarbon-based products makes it an effective colorant for fuel differentiation and quality control.

Key Performance Benefits:

• High Solvent Compatibility: Soluble in a wide range of organic solvents, making it highly versatile for industrial applications.

• Excellent Lightfastness and Weather Resistance: Ensures color stability and durability under prolonged exposure to light and environmental factors, particularly in outdoor applications.

• Thermal Stability: Capable of withstanding high-temperature processes, such as extrusion and molding, without degradation of color or performance.

• High Tinting Strength: Provides vivid, intense red coloration even at low dye concentrations, ensuring cost-effective usage.

• Minimal Migration: High resistance to migration ensures color remains locked into substrates, especially in polyolefins and PVC, reducing the risk of bleeding or staining.