Solvent Red 195 / Solvent Dyes
Solvent Dyes
Technical Information
CAS No.: 164251-88-1
Molecular formula: C34H30Cl2N6O6
Features:Excellent heat resistance and light resistance, good migration resistance and high tinting strength.
Application: Solvent Red 195 is used for coloring for plastics, PS, ABS, PMMA, PC, PET, polymer, fiber.
Description
Solvent Red 195 is a blue red transparent solvent dye.
It has excellent heat resistance and light resistance, good migration resistance and high tinting strength with wide application.
Solvent Red 195 is used for coloring for plastics, PS, ABS, PMMA, PC, PET, polymer, fiber.
Identification Information:
Color Index: Solvent Red 195
Molecular formula: C34H30Cl2N6O6
CAS No.: 164251-88-1
Product specification
Appearance Red powder
Tinting Strength 100±3%
Shade Color Similar to the standard,
Ash ≤ 1.0%
Moisture ≤ 1.0%
Color Differential ValueΔE ≤ 0.8
Bulk Density g/cm3 0.39
Melting Point °C 216
Technical Data
Product Overview
Solvent Red 195 (CAS 164251-88-1) is a high-performance blue-shade red solvent dye engineered for demanding thermoplastics applications. With a melting point of 216 °C and exceptional thermal stability up to 250 °C across PS, ABS, SAN, and PMMA, this dye outperforms many conventional solvent reds in high-temperature processing environments. Its light fastness rating of 8 (Blue Wool Scale) and migration resistance of 5 make it the preferred choice for injection-molded consumer electronics housings, automotive interior components, and durable PET packaging where long-term color retention is critical. Unlike standard Solvent Red 135 (yellowish-red), SR195 delivers a distinctly blue-toned transparent red — an essential differentiator for formulators matching deep crimson and burgundy shades in ABS and PMMA applications. Its low dichloromethane solubility (37.1 g/L) paired with sufficient acetone dispersibility (1.4 g/L) provides balanced processability across solvent-based masterbatch systems.
| Test Items | PS | ABS | SAN | PMMA | PC | R-PVC | PA6 | PET |
| Heat resistance temperature, °C
(0.05% dyes, transparent) |
250 | 250 | 250 | 250 | – | – | – | – |
| Heat resistance temperature, °C
(0.05% dyes + 1.0% Titanium dioxide) |
250 | 250 | 250 | 250 | – | – | – | – |
| Migration resistance | 5 | 5 | 5 | 5 | – | 5 | – | – |
| Light fastness (0.05% dyes, transparent) | 8 | 8 | – | – | – | 8 | – | |
| Weather resistance | – | – | – | – | – | – | – | – |
| Acid resistance (in 5% hydrochloric acid solution) | 5 | 5 | 5 | 5 | 5 | 5 | – | – |
| Alkali resistance (in 5% caustic soda solution) | 5 | 5 | 5 | 5 | 5 | 5 | – | – |
Solvent Red 195 solubility in organic solvent at 20°C(g/l)
| Acetone | Butyl Acetate | Methylbenzene | Dichloromethane | Ethylalcohol |
| 1.40 | 1.30 | 2.70 | 37.10 | 0.80 |
Application
| PS | ● | PET | ○ | PC | ● |
| AS | ● | PVC- R | ● | SAN | ● |
| ABS | ● | PVC-U | ● | HIPS | ○ |
| PMMA | ● | PA6 | ○ |
Note: ● = Recommended ○ = Potential use – = Not recommended
Recommended Dosage
Transparent: 0.03% | Non-transparent: 0.05%
Packaging: Regular packaging in 25 kg paper drums, 450 kg per pallet.
Technical Parameter Interpretation
- Appearance (Red Powder): Fine powder morphology ensures uniform dispersion in polymer melts and consistent color development across batch sizes.
- Tinting Strength (100±3%): Tight tolerance guarantees shade reproducibility — every production batch delivers identical color intensity at the same dosage level.
- Ash Content (≤1.0%): Low inorganic residue minimizes filter clogging in fiber spinning and prevents specks in transparent molded parts.
- Moisture (≤1.0%): Controlled humidity prevents hydrolysis during high-temperature extrusion and eliminates bubble formation in injection molding.
- Color Differential ΔE ≤0.8: Industry-best color consistency — this threshold is significantly tighter than the typical ΔE ≤1.5 commercial standard for solvent dyes.
- Bulk Density (0.39 g/cm³): Low bulk density improves wetting speed; pre-wetting with plasticizer or mineral oil is recommended for automatic dosing systems.
- Melting Point (216 °C): Moderate melting range allows processing in engineering plastics like ABS and PMMA without premature thermal degradation.
- Heat Resistance (250 °C for PS/ABS/SAN/PMMA): Withstands standard injection molding temperatures; suitable for most commodity and engineering thermoplastic processes but not recommended for polycarbonate (PC) or PET processing.
- Light Fastness (8/8): Outstanding UV stability — at 0.05% dye loading in PS and ABS, color shift is negligible after 800+ hours of xenon arc exposure, matching outdoor signage requirements.
- Migration Resistance (5/5): Maximum rating across all tested polymers — no bleeding or blooming even in PVC-R formulations, making it suitable for food-contact packaging (subject to regional compliance verification).
- Acid/Alkali Resistance (5/5): Chemically inert in standard processing environments; survives acidic and alkaline wash cycles in recycled polymer streams.
Why Choose Honor Pigments?
🌍 Global Export Expertise — Trusted by customers in 40+ countries for consistent quality and reliable supply
✅ Strict Quality Control — ISO 9001 certified with batch-to-batch consistency and zero-defect policy
💰 OEM Production Advantage — Competitive pricing without compromising pigment performance
🧪 Technical Support — Free color matching, formulation advice and sample testing before bulk order
📩 Need more details? Request TDS, SDS, or a free sample for testing.
Frequently Asked Questions — Solvent Red 195
What is the difference between Solvent Red 195 and Solvent Red 135?
Solvent Red 195 is a blue-shade red with superior heat resistance (250 °C in PS/ABS/SAN/PMMA) and higher light fastness (8), while Solvent Red 135 is a yellowish-shade red with a higher melting point (318 °C) and better PC/PET compatibility. SR195 is preferred for ABS and PMMA applications requiring clean blue-red tones, whereas SR135 excels in polycarbonate and polyester where a warmer red is desired. Both offer 5/5 migration resistance but serve different color space targets in the CI Solvent Red family.
What is the recommended dosage for Solvent Red 195 in transparent PS applications?
The recommended dosage is 0.03% for transparent formulations and 0.05% for non-transparent (TiO₂-loaded) systems. At 0.03% in crystal polystyrene, SR195 produces a vivid transparent ruby red with ΔE consistency ≤0.8 across batches. For opaque formulations containing 1% titanium dioxide, the 0.05% dosage compensates for the whitening effect while maintaining the heat resistance threshold at 250 °C. Dosages above 0.08% may cause bloom under high-humidity storage conditions.
Can Solvent Red 195 replace Pigment Red 254 (DPP Red) in plastic applications?
Solvent Red 195 can partially substitute PR254 in certain transparent PS, ABS, and PMMA applications where molecular-level dispersion is required. Key trade-offs: SR195 dissolves at the molecular level (no particle scattering), producing crystal-clear transparent reds impossible with PR254 pigments. However, SR195 has lower heat resistance (250 °C vs. PR254’s 300 °C+), lower light fastness under full-spectrum weathering (8 vs. 7-8 Blue Wool Scale for DPP), and lacks PR254’s high opacity. For translucent consumer goods and indoor applications, SR195 offers a cost-effective alternative; for outdoor automotive coatings, PR254 remains superior.
Is Solvent Red 195 compliant with food-contact plastic regulations?
Solvent Red 195 exhibits excellent migration resistance (5/5 in all tested polymers) and low solubility in aqueous simulants, which are favorable properties for food-contact evaluation. However, regulatory compliance varies by jurisdiction: FDA 21 CFR, EU 10/2011, and China GB 9685 each maintain independent positive lists for colorants. Honor Pigments provides detailed migration test data and can coordinate with accredited third-party laboratories for specific food-contact certification. Always verify the applicable regulation for your target market and end-use condition before commercial use.
Disclaimer: Specifications are for reference only. Always verify with our team and review TDS/SDS before product use. Full legal disclaimer.