Solvent Red 146
Solvent Red 146 (CAS 70956-30-8), traded as Transparent Red FB, is a bright bluish red anthraquinone solvent dye with a melting point of 213°C. It exhibits acceptable light fastness and excellent heat resistance, and it is especially suitable for coloring light shade products or for blending with TiO2 to reach clean pink shades. Recommended for PS, ABS, PC, PET, PMMA and PA, it gives brilliant transparent red at low dosage and is a common component in transparent red and magenta shade recipes for plastics.
Key Features
Technical Specifications
| Trade Name | Transparent Red FB |
| C.I. NO. | 60756 |
| CAS NO. | 70956-30-8 |
| EU NO | - |
| Chemical Group | Anthraquinone |
| Solubility | Excellent in organic solvents |
| Melting Point | 213°C |
Physical Data & Fastness Properties
| Light Fastness | Good to Excellent |
| Heat Resistance | 300°C |
Application Fields
This product is widely used in the following application fields, providing excellent coloring performance and durability:
- Nylon (PA)
- Polystyrene (PS)
- ABS
- Polycarbonate (PC)
- PET
- PMMA
Usage Instructions
Dose 0.05-0.5% for transparent reds; with TiO2, 0.1-1.0% produces pinks. The dye is stable to 300°C, covering PS, ABS, PC, PET and PMMA processing. Pre-mix with pellets for uniform color. For bluer, deeper reds blend with Solvent Blue or Violet grades; for orange reds use Solvent Red 111.
Frequently Asked Questions
What is Solvent Red 146 used for?
Solvent Red 146 is mainly used for transparent coloring of Nylon (PA), Polystyrene (PS), ABS, Polycarbonate (PC) and other polymers, and can also be used for masterbatch production.
What are the key properties of Solvent Red 146?
Solvent Red 146 offers a heat resistance of 300°C, and has light fastness rated Good to Excellent, and has a Anthraquinone chemical structure.
What is the CAS number of Solvent Red 146?
The CAS number of Solvent Red 146 is 70956-30-8, and its Colour Index number is C.I. 60756.
Related Products
You may also be interested in these products
Solvent Blue 104
Solvent Blue 104, sold under the trade name Transparent Blue 2B, is a high strength anthraquinone oil soluble solvent dye that delivers a clean medium blue shade in transparent plastics. With heat resistance up to 300°C and good to excellent light and weather fastness, it is a widely used engineering plastics dye for PET, PC, PA, PS, ABS and PMMA, and is a proven choice for spin dyeing of nylon fibers. Its high tinting power keeps dosing low, which helps control formulation cost in masterbatch and compounding applications.
Solvent Blue 122
Transparent Blue R is the trade name of Solvent Blue 122, a reddish blue anthraquinone solvent dye with notably high color strength. Its melting point of 239°C is complemented by heat resistance up to 300°C during processing, and its light fastness is rated good to excellent. The dye is primarily used for coloring engineering plastics, including PET blowing applications, and is highly recommended for spin dyeing of synthetic fibers. It is fully compatible with PS, ABS, PC, PMMA and PA systems and is a practical option for deep transparent blue shades.
Solvent Blue 35
Solvent Blue 35, marketed as Transparent Blue 2N, is an economical anthraquinone solvent dye producing a bright greenish blue in polystyrene and ABS. It offers high color strength and excellent heat resistance for its class, with a melting point of 127°C. Light fastness is good to excellent in full shade but decreases as titanium dioxide is added, so it is best positioned for transparent or lightly tinted articles. As a cost effective oil soluble dye, it is a common choice for general purpose PS and ABS coloring.
Solvent Blue 45
Solvent Blue RS (Solvent Blue 45) is a reddish blue anthraquinone dye with a melting point of 200°C, giving good heat resistance alongside good light fastness. This oil soluble solvent dye is used across engineering plastics and is highly recommended for spin dyeing and PET blowing where a stable reddish blue is needed. It dissolves excellently in organic solvents, which also makes it suitable for solvent based coloring of coatings, inks and foils. A dependable mid-range grade for transparent blue shades.