PIGMENT YELLOW 151/ HP YELLOW 1618
Good dispersibility
Technical Information
C.I.NO.: PY151
Advantage: Good dispersibility
Main Application Recommended: Printing inks, Coatings, Plastics
Product Description – PY151
HP YELLOW 1618 (PIGMENT YELLOW 151) affords a clean greenish yellow shade. it can provide good hiding powder, it has very lightfast and durable. excellent heat stable and acid resistance. it mainly used in high grade industrial finishes, OEM and refinishes, and co lor PVC, Polyolefines, PVC, HDPE etc.
Recommended Application：
Coatings: solvent based paints, water based paints, industrial coatings, powder coatings, coil coatings, auto paints, wood coatings
Plastics: PP, PE, PVC, PS/SAN, ABS, PET, PBT, Rubber/TPV, SBC, TPO, TPU
Printing inks: solvent based inks, water based inks
Technical Data:
| Product Information | ||||
|---|---|---|---|---|
| Chemical Type | Benzimidazolone | CAS NO. | 31837-42-0 | |
| C. I. Name | Pigment Yellow 151 | EINECS / ELINCS NO. | 250-830-4 | |
| C. I. Constitution No. | 13980 | Chemical Formula | C18H15N5O | |
| Technical Performance | ||||
|---|---|---|---|---|
| Full Shade | Tint | |||
| Full Shade | Tint | |||
| Weather Resistance | 5 | 5 | Heat Stability °C | 260°C |
| Light Fastness | 8 | 7 | ||
| Physical Properties | ||||
|---|---|---|---|---|
| Physical Form | Powder | Resistance to Acid | 5 | |
| Specific Density (g/cm3): | 1.50 ± 0.1 | Resistance to Alkali | 5 | |
| Specific Surface(㎡/g): | 23 | Migration resistance PVC | 5 | |
| Oil Absorption | 55 | Low warping applications | Suitable | |
| pH Value | 5.0 -8.0 | |||
| Volatile Matter | 1% max | |||
| Packaging | ||||
|---|---|---|---|---|
| 10kgs/bag 300kgs/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 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 YELLOW 151
What is PIGMENT YELLOW 151 (PY151) and what are its key technical properties?
PIGMENT YELLOW 151 (C.I. Pigment Yellow 151, CAS 31837-42-0) is a benzimidazolone-based organic pigment that delivers a clean greenish-yellow shade. It exhibits excellent heat stability up to 200°C, outstanding lightfastness, and strong resistance to acids. The pigment’s high hiding power and durability make it suitable for demanding applications such as high-grade industrial finishes, OEM/refinish coatings, and engineering plastics. It offers good dispersibility, enabling efficient processing in solvent-based and water-based systems. Typical density ranges from 1.4–1.6 g/cm³ depending on physical form.
How does PIGMENT YELLOW 151 perform in polyolefins like PP and HDPE?
PIGMENT YELLOW 151 performs reliably in polyolefins (PP, HDPE) and PVC, with heat stability that supports processing temperatures up to 200°C. It provides a strong greenish-yellow hue with good hiding powder and minimal bleed in plasticized PVC. The pigment is also compatible with engineering resins like ABS and PET, making it a versatile choice for color concentrates. For HDPE injection molding applications, it maintains color strength and shade consistency without migration issues.
Is PIGMENT YELLOW 151 suitable for water-based industrial coatings with strict lightfastness requirements?
Yes, PIGMENT YELLOW 151 is well-suited for water-based industrial coatings, including those needing high lightfastness, such as OEM automotive topcoats and architectural finishes. Its benzimidazolone chemistry provides excellent resistance to UV degradation—typically rated 7–8 on the Blue Wool scale—while maintaining color purity in exterior applications. Proper dispersion with suitable wetting and dispersing agents ensures optimal color development and clarity. For coil coatings and wood finishes, PY151 offers the durability required for long-term outdoor exposure.
Can PIGMENT YELLOW 151 replace diarylide yellows (e.g., PY12, PY13) in printing inks?
PIGMENT YELLOW 151 can serve as a high-performance alternative to diarylide yellows (PY12/PY13) in solvent-based and water-based inks when the application demands superior heat stability, lightfastness, or resistance to bleed. While diarylide yellows offer higher tinting strength at lower cost, PY151 provides a cleaner greenish-yellow shade with significantly better durability—ideal for packaging inks for films requiring pasteurization or sterilization. However, its lower color strength and higher price point require careful formulation optimization. In flexographic and gravure inks, PY151 delivers reliable dispersibility with bead-mill or media-mill processing.
What performance data supports the use of PIGMENT YELLOW 151 in automotive OEM coatings?
PIGMENT YELLOW 151 is a leading choice for automotive OEM and refinish coatings due to its lightfastness rating (typically 7–8), heat stability up to 200°C, and resistance to acids and weathering. It provides a vivid greenish-yellow hue suitable for both solid and metallic shades. In solvent-based systems (e.g., polyester-melamine or acrylic-isocyanate), it demonstrates good transparency and gloss retention. Accelerated weathering tests confirm minimal color shift over years of outdoor exposure, making it a robust option for clear-on-base or powder coating systems. Its high hiding power also reduces coating thickness requirements in industrial applications.