Solvent Red 149

Brand	Fineland Chem
Color Index	Solvent Red 149
Color Index No	674700
CAS No	21295-57-8
EC No	244-320-0
Chemical Class	Anthraquinone
Hue	Bright Bluish Red

What is Solvent Red 149?

Solvent Red 149 is a high-performance red solvent dye used for coloring plastics, synthetic fibers, inks, fuels, and specialty applications. Unlike pigments, Solvent Red 149 is soluble in organic media, allowing it to provide transparent and brilliant coloration.

It is known for its strong tinting strength, good thermal stability, and excellent solubility in various polymer and solvent systems. Due to these properties, Solvent Red 149 is widely used in applications where clarity and brightness are required.

Product Technical Data and Typical Performance Values

SR149 – CorSol®3549 ⬇️TDS

This is a bright bluish red pigment recommended for plastics such as PS, PMMA, PC, ABS and rigid PVC, offering stable performance and consistent quality in industrial processing.

Physical Properties

Test Item	Specification
Bulk Density (g/cm³)	0.3
Melting point (℃)	approx. 266
Moisture(%)	≤0.5
Ash(%)	≤0.3
Insolubility(%)	≤0.3
PH Value	6-8
Fe Content(ppm)	≤1000

Fastness Properties

Heat Resistance (℃) in PS	280	Migration Resistance(1~5)	5
Light Resistance (Full Shade, 1-8)	3-4	Resistance to Acid(1~5)	5
Light (Reduced tinting, 1~8)	3	Resistance to Alkali(1~5)	5

Key Performance Properties Related to Applications

1. Excellent Solubility

Solvent Red 149 dissolves well in many organic solvents and polymer systems, ensuring uniform coloration without particle dispersion issues typical of pigments.

2. High Transparency

Unlike opaque pigments, this solvent dye provides bright and transparent red shades, making it suitable for clear or translucent plastic products.

3. Good Heat Resistance

It demonstrates stable performance under typical plastic processing temperatures, especially in engineering plastic systems.

4. Strong Tinting Strength

Solvent Red 149 offers high color intensity even at low dosage levels, contributing to efficient formulation.

Advantages of Solvent Red 149

1. Ideal for Transparent Applications
Its solubility allows clear, brilliant coloration in plastics and solvent-based systems.

2. Suitable for Engineering Plastics
The dye maintains stability in many thermoplastic processing conditions.

3. Uniform Color Development
Since it dissolves rather than disperses, it provides consistent color without sedimentation.

Typical Limitations of Solvent Red 149

1. Limited Lightfastness Compared to High-Performance Pigments
Solvent dyes generally offer lower outdoor durability than DPP or other high-performance pigments.

2. Potential Migration in Certain Plastics
In some polymer systems, solvent dyes may migrate over time depending on compatibility and formulation.

3. Not Suitable for Opaque Applications
For applications requiring high hiding power, pigment-based systems are more appropriate.

Understanding these limitations helps ensure proper material selection.

Buyer Guidance: What to Confirm When Sourcing Solvent Red 149

Before selecting Solvent Red 149, buyers should confirm:

Target application (plastics, inks, fuels, fibers, etc.)
Processing temperature
Required transparency level
Migration resistance expectations
Regulatory compliance requirements

Providing clear application information allows suppliers to recommend the most suitable grade.

Solvent Red 149 Manufacturer and Supplier Information

Fineland Chem is a B2B supplier of solvent dyes and industrial colorants, providing Solvent Red 149 for plastics, inks, fuels, and specialty applications.

The product is manufactured under controlled quality systems to ensure consistent shade, solubility performance, and batch stability. Technical communication and export support are available for international customers.