PIGMENT RED 254/ HP RED 2634
Covering powder, Low viscosit
Technical Information
C.I.NO.: PR254
Advantage: Covering powder, Low viscosit
Main Application Recommended: Coil Coatings, Oil Based Paints, Powder Coatings, Industrial Paints
Why Formulators Choose HP RED 2634
Pigment Red 254 (C.I. 56110) is the industry-standard DPP (diketopyrrolopyrrole) red that defines the high-performance organic red category. What distinguishes HP RED 2634 from commodity reds is its uncompromising thermal stability: rated to 300°C, it maintains full color integrity through curing cycles that destroy conventional azo reds (PR48, PR57) above 200°C. With Blue Wool lightfastness of 8 (full shade) and 7–8 (tint), it matches the weatherability of much more expensive perylene pigments at a fraction of the cost. A European coil coating manufacturer replaced their PR170/PR254 blend with pure HP RED 2634 and eliminated post-cure shade correction entirely — saving 3 hours per production batch while achieving tighter ΔE tolerances. Formulators choose HP RED 2634 for automotive OEM coatings, coil coatings, and engineering plastics because it delivers the rare combination of high hiding power, low viscosity, and batch-to-batch consistency (ΔE < 0.5) that high-volume manufacturing demands. When color failure is not an option, PR254 is the answer.
Products Description -PR254
HP RED 2634 (PIGMENT RED 254) affords medium shades of red in full shades, while white reductions are somewhat bluish red.It shows high tinctorial strength and bleeding fastness. it recommended for high industrial paints, powder coatings and coil coatings.
Recommended Application:
Coatings: solvent based paints, water based paints, Auto Paints, industrial coatings, powder coatings, wood coatings, coil coatings
Plastics: PP, PE, PVC, PS/SAN, ABS, POM, PBT, Rubber/TPV, SBC, TPO, TPU
Printing inks: offset inks, solvent based inks, water based inks
Technical Data:
| Product Information | ||||
|---|---|---|---|---|
| Chemical Type | DPP | CAS NO. | 84632-65-5 | |
| C. I. Name | Pigment Red 254 | EINECS / ELINCS NO. | 402-400-4 | |
| C. I. Constitution No. | 56110 | Chemical Formula | C18H10Cl2N2O2 | |
| Technical Performance | ||||
|---|---|---|---|---|
| Full Shade | Tint | |||
| Full Shade | Tint | |||
| Weather Resistance | 5 | 4-5 | Heat Stability °C | 300°C |
| Light Fastness | 8 | 7-8 | ||
| Physical Properties | ||||
|---|---|---|---|---|
| Physical Form | Powder | Resistance to Acid | 5 | |
| Specific Density (g/cm3): | 1.60 ± 0.1 | Resistance to Alkali | 5 | |
| Specific Surface(m²/g): | 26 | Migration resistance PVC | 5 | |
| Oil Absorption | 40 | Low warping applications | Suitable | |
| pH Value | 6.0-8.0 | |||
| Volatile Matter | 1% max | |||
| Packaging | ||||
|---|---|---|---|---|
| 10kgs/Bag 400kgs/Pallet | ||||
| Storage Shelf Life 5 years | ||||
| Should be stored in cool, dry and ventilate place. |
| TRANSPORTATION | ||||
|---|---|---|---|---|
| Avoid inversion, sunlight, moisture and crash. Avoid damage the package. |
- Light fastness: Light fastness rating is assessed on 1 to 8 Blue Wool scale where 1 = ‘Poor’ and 8 = ‘Excellent’.
- Heat Stability: Heat stability values given indicate the maximum temperature at which the pigment can be stoved for 10 min. on the full shade and in reductions without undergoing any significant change in shade.
- Oil absorption: The oil absorption is determined on the basis of EN ISO 787-5 and given in g linseed oil per 100 gm. pigment.
- Solvent bleeding: The bleeding in solvents is tested using the powder grades and the visual rating given on 1 to 5 Grey scale
where 1 = ‘Heavy bleeding’ and 5 = ‘No bleeding”
Technical Parameter Interpretation
| Weather Resistance | Full Shade 5 / Tint 4–5 — Suitable for exterior industrial and coil coatings. For decades-long architectural exposure without topcoat, consider UV-stabilized topcoat systems or inorganic alternatives for maximum longevity. |
| Light Fastness | Full Shade 8 / Tint 7–8 (Blue Wool Scale) — Excellent. Suitable for automotive OEM finishes, high-end industrial coatings, and outdoor signage requiring >5-year color retention. The slight tint reduction (7–8) is typical of organic pigments and exceeds most application requirements. |
| Heat Stability | 300°C — Suitable for all engineering plastics including PA, PBT, PC, and POM processing. Exceeds requirements for PP/PE masterbatch (typically 200–240°C). Enables use in high-temperature powder coating curing cycles. |
| Specific Density | 1.60 ± 0.1 g/cm³ — Moderate density ensures stable suspension in low-viscosity solvent-based systems. Higher than most azo reds (~1.4 g/cm³) but lower than iron oxides (~5.0 g/cm³), offering a practical balance for most formulation types. |
| Oil Absorption | 40 g/100g — Low oil absorption enables high pigment loading in solvent-based coatings without excessive viscosity build-up, translating to cost-efficient formulations with excellent opacity per mil of dry film. |
| Specific Surface | 26 m²/g — Moderate surface area balances dispersibility with flocculation resistance. Compatible with both high-shear (bead mill) and medium-shear (high-speed disperser) processing. |
| Acid / Alkali Resistance | 5 / 5 (maximum rating) — Suitable for industrial environments with chemical exposure, including automotive underbody coatings and chemical plant equipment applications. |
| Migration Resistance (PVC) | 5 (maximum) — Non-migrating in PVC. Suitable for multi-layer systems, overcoating applications, and formulations adjacent to light-colored substrates. |
Technical Note — The data and recommendations provided are based on HONOR Pigment’s internal testing and manufacturing experience. They are offered in good faith to assist customers in evaluating product suitability for their specific applications. As processing conditions, formulations, and end-use requirements vary widely, customers should conduct their own validation under actual use conditions. HONOR Pigment makes no warranties, express or implied, regarding the accuracy of this information or its fitness for any particular purpose. Nothing herein shall be construed as a license or recommendation to infringe any patent. HONOR Pigment’s standard terms and conditions of sale apply.oduct contains particles < 0.1 μm. Any user of this product is responsible for determining the suitability of Honor Pigments’s products for its particular application & to ensure that any proprietary rights & existing laws & legislation are observed.
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 — PIGMENT RED 254
What is Pigment Red 254, and why is it regarded as a high-performance DPP pigment?
Pigment Red 254 (C.I. 56110, CAS 84632-65-5) is a diketopyrrolopyrrole (DPP) organic pigment with the molecular formula C18H10Cl2N2O2. Its DPP chromophore produces a brilliant medium-shade red with a bluish undertone in white reductions, combined with outstanding heat stability and lightfastness. It is the benchmark high-performance red for automotive OEM finishes, industrial coatings, and engineering plastics where conventional azo reds cannot meet durability requirements.
What heat stability and lightfastness can formulators expect from Pigment Red 254?
Pigment Red 254 withstands 300°C heat stability and delivers Blue Wool lightfastness of 8 (full shade) and 7–8 (tint), with weather resistance rated 5 (full shade) and 4–5 (tint). These ratings suit coil coating curing ovens, powder coating bake cycles, and engineering plastics such as PA, PBT, and PC. The slight tint reduction is normal for organic pigments and still exceeds most exterior application requirements.
Is Pigment Red 254 suitable for polyolefin plastics and automotive coatings without migration?
Yes. Pigment Red 254 shows excellent migration and bleeding fastness (rating 5), making it suitable for PP, PE, PVC, ABS, POM, and PBT masterbatch as well as automotive OEM coatings and refinishes. Its specific density of 1.60 ± 0.1 g/cm³ and oil absorption of 40 g/100g support high pigment loading with stable dispersion and low viscosity in both solvent- and water-based systems.
How does Pigment Red 254 compare with conventional azo reds such as PR48 or PR57?
Conventional azo reds (PR48, PR57) typically degrade above 200°C and offer lower lightfastness, limiting them to non-durable applications. Pigment Red 254’s DPP chemistry sustains 300°C heat stability and far higher lightfastness, allowing it to replace azo reds in high-temperature curing, exterior coatings, and engineering plastics without post-cure shade correction — the key reason formulators select it for coil coatings, powder coatings, and automotive finishes.