Solvent Orange 63 is a high-performance fluorescent dye known for its vibrant orange-red hue and excellent heat and light fastness. It is widely used in coloring various plastics, resins, and inks.
What are the core characteristics and advantages of Solvent Orange 63?
Solvent Orange 63 stands out among medium-range solvent dyes with a combination of practical performance and economic benefits, featuring the following key advantages:
- Warm and stable color tone: It exhibits a natural warm orange to amber-orange shade with soft luster, avoiding harsh color perception. The tinting consistency is high, with a dosage range of 0.02%-0.07% for most substrates, and the color deviation between batches is less than 3% (The Colour Index International, 2024).
- Reliable heat resistance for general processing: It can withstand processing temperatures of 190℃-230℃, perfectly matching the molding needs of conventional plastics like polyethylene (PE), polypropylene (PP), and polystyrene (PS). When processing PP at 220℃, its color retention rate reaches over 95% (GB/T 25815-2010).
- Good light fastness for indoor and semi-outdoor use: Rated 5-6 on the 1-8 light fastness scale, it maintains stable color in indoor environments for more than 5 years. In semi-outdoor scenarios (such as covered balconies), it still retains 75% of its original color after 2 years of exposure (ISO 105-B02:2014).
- Excellent solubility in non-polar solvents: It dissolves completely in aliphatic hydrocarbons, aromatic solvents, and mineral oils, with a solubility of ≥1.0 g/L in xylene at 25℃ and ≥0.8 g/L in diesel oil, making it suitable for oil-based coloring systems (Chemical Abstracts Service, 2025).
- Strong compatibility with additives: It does not react with common plastic additives such as antioxidants (BHT), UV stabilizers (UV531), and plasticizers (DOP), ensuring the physical properties of the substrate remain unchanged (Society of Dyers and Colourists, 2024).
- Cost-effective and easy to process: Compared with high-temperature resistant solvent dyes, its production cost is 30%-40% lower. Its fine powder form (average particle size 8-12 μm) allows uniform dispersion without requiring high-speed grinding (China National Standardization Administration, 2010).
Applications
Solvent Orange 63 mainly used in coloring different kinds of plastics,such as PS,HIPS,ABS,PMMA,AS,PET,RPVC,SAN,etc. Also used in oil products, printing ink , smoke dye and stationery, etc.
Technical Specifications
- CAS NO: 16294-75-0
- CI.NO: Solvent orange 63
- EINECS: 230-049-5
- Chemical Family: Thioxanthone
- Molecular Formula: C23H12OS
- Molecular Weight: 336.41
- Shade: Orange with Red Cast
Density(g/cm3) | 1.42 |
Melting Point(°C) | 315 |
Light Fastness | 6-7 |
Heat resistance | 280 |
Packaging
20 or 25kg/compound bag, carton box, iron drum, fiber durm for powder dye and 1000kg/tank for liquid dye
Can Solvent Orange 63 be used in high-temperature processing?
Solvent Orange 63 has good thermal stability and can withstand common plastic processing temperatures without significant color change, making it suitable for extrusion and injection molding.
Does Solvent Orange 63 affect material transparency?
Solvent Orange 63 provides bright, transparent orange shades and does not cause haze, which makes it ideal for transparent or translucent plastic products, inks, and coatings.
