Solvent Orange 60 / Solvent Dyes
Good light fastness and excellent heat resistance,
Technical Information
CAS No.: 6925-69-5
Molecular formula: C18H10N2O
Advantage: Good light fastness and excellent heat resistance, good migration resistance and high tinting strength with wide application.
Application: Used for coloring for plastics, PS, ABS, PMMA, PC, PET, polymer, fiber.
Solvent Orange 60 — Perylene-Based High-Performance Solvent Dye for Engineering Thermoplastics
Solvent Orange 60 (C.I. Solvent Orange 60, CAS 6925-69-5) is a perylene-derived solvent dye engineered for demanding polymer coloration. Its perylene chromophore delivers an exceptionally clean, brilliant orange shade with industry-leading thermal stability — maintaining color integrity at processing temperatures up to 300°C across PS, ABS, SAN, PMMA, and PC substrates. With Blue Wool light fastness rating of 7–8 and migration resistance of 5 in all tested polymers, this dye outperforms conventional azo and anthraquinone orange dyes in long-term weathering applications. The dye’s high solubility in dichloromethane (240 g/L) makes it particularly effective for solution-dyed fibers and solvent-based masterbatch preparations. Unlike lower-grade orange dyes that shift toward brown at elevated temperatures, Solvent Orange 60 retains its chromatic purity in high-temperature injection molding and extrusion processes for automotive interior components, electronic housings, and premium consumer goods where color consistency is non-negotiable.
Identification Information:
Color Index: Solvent Orange 60
Molecular formula: C18H10N2O
CAS No.: 6925-69-5
Product specification
Appearance Blue powder
Tinting Strength 100±3%
Shade Color Similar to the standard,
Ash ≤ 0.1%
Moisture ≤ 0.2%
Color Differential ValueΔE ≤ 0.8
Density g/cm3 1.42
Melting Point ℃ 230
Technical Data
| Test Items | PS | ABS | SAN | PMMA | PC | R-PVC | PA6 | PET |
| Heat resistance temperature, ℃
(0.05% dyes, transparent) |
300 | 300 | 300 | 300 | 300 | – | – | – |
| Heat resistance temperature, ℃
(0.05% dyes + 1.0% Titanium dioxide) |
300 | 300 | 300 | 300 | 300 | – | – | – |
| Migration resistance | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Light fastness (0.05% dyes, transparent) | 7-8 | 7-8 | – | – | – | 7-8 | – | |
| Weather resistance | – | – | – | – | – | – | – | – |
| Acid resistance (in 5% hydrochloric acid solution) | – | – | – | – | – | 5 | – | – |
| Alkali resistance (in 5% caustic soda solution) | – | – | – | – | – | 5 | – | – |
Solvent Orange 60 solubility in organic solvent at 20℃(g/l)
| Acetone | Butyl Acetate | Methylbenzene | Dichloromethane | Ethylalcohol |
| 3.0 | 8.0 | – | 240.0 | 0.1 |
Application Profile
| PS | ● | PET | ● | PC | ● |
| AS | ● | PVC- R | ● | SAN | ● |
| ABS | ● | PVC-U | ● | PBT | ● |
| PMMA | ● | PET | ● | PA6 | ○ |
Note: ● = recommended ○ = potential use – = not recommended
Recommended Dosage
Transparent: 0.025
Non-transparent: 0.05
Packaging:
Regular Packaging is in 20kgs paper Box, 360kgs per pallet.
Technical Parameter Interpretation — Solvent Orange 60
Heat Resistance (300°C across PS/ABS/SAN/PMMA/PC): The consistent 300°C thermal stability across five major thermoplastics confirms this dye’s suitability for high-temperature engineering resin processing. This is the ceiling temperature for most organic dyes — only perylene and anthraquinone chemistries achieve this level without decomposition. For processors running ABS at 230–260°C or PC at 280–310°C, Solvent Orange 60 provides a comfortable safety margin against thermal degradation and color shift.
Light Fastness 7–8 (Blue Wool Scale): A rating of 7–8 on the Blue Wool scale (equivalent to 1,200+ hours xenon arc without significant fading) places this dye in the high-performance category. It is suitable for outdoor-adjacent applications and interior automotive components where UV exposure through glazing is a design consideration. This level exceeds the 6–7 typically required for interior automotive specifications.
Migration Resistance 5 (all polymers): A migration rating of 5 indicates zero detectable bloom or bleed when the dye is used within recommended dosage ranges. This is critical for multi-layer co-extrusion, overmolding applications, and food-contact-adjacent packaging where dye mobility could create compliance or aesthetic issues.
Dichloromethane Solubility 240 g/L: The exceptionally high solubility in chlorinated solvents enables efficient masterbatch production via solvent-based dispersion techniques. This solubility profile also supports spin-dyeing applications for polyester fibers where uniform dispersion at the molecular level is essential for consistent shade.
Melting Point 230°C: A relatively high melting point for a solvent dye indicates strong intermolecular forces within the perylene crystal lattice, contributing to the dye’s outstanding thermal endurance and low tendency to sublime during processing.
Frequently Asked Questions — Solvent Orange 60
What is the difference between Solvent Orange 60 and Solvent Orange 107 for plastics coloring?
Solvent Orange 60 is a perylene-based dye offering superior heat stability (up to 300°C) and light fastness (7–8), making it ideal for engineering thermoplastics like PC and PMMA. Solvent Orange 107, by contrast, typically exhibits lower thermal thresholds (around 240–260°C) and is better suited for commodity polymers like PS and rigid PVC. If your processing temperature exceeds 260°C or you need long-term UV stability, Solvent Orange 60 is the recommended choice.
Can Solvent Orange 60 be used in polyester fiber spin-dyeing?
Yes, Solvent Orange 60 is well-suited for polyester fiber spin-dyeing. Its high solubility in dichloromethane (240 g/L) and perylene chemical backbone enable molecular-level dispersion in the polymer melt, producing fibers with consistent shade, high color yield, and excellent wash fastness. The recommended dosage for transparent fiber applications is 0.025% by weight.
How does the heat resistance of Solvent Orange 60 compare to pigment-based orange colorants?
Solvent Orange 60 at 300°C heat resistance matches or exceeds many high-performance organic orange pigments (such as PO64 or PO73) for polymer coloration. Unlike pigments, solvent dyes dissolve completely in the polymer matrix — eliminating dispersion-related quality issues like specking or filter blockage — while providing equivalent thermal stability for most thermoplastics. This makes Solvent Orange 60 an efficient single-component alternative where pigment dispersion would add processing complexity.
What packaging and storage conditions are recommended for Solvent Orange 60?
Solvent Orange 60 is supplied in 20 kg paper boxes, 360 kg per pallet. Store in a cool, dry environment below 40°C away from direct sunlight and moisture. Under proper storage conditions, the product maintains full tinting strength and shade consistency for 24 months from the date of manufacture. Always reseal opened containers to prevent moisture absorption.
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