PIGMENT YELLOW 42/ TRANSPARENT YELLOW 91176
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Technical Information
Pigment Yellow 42 (C.I. PY42, CAS 51274-00-1) is a premium transparent iron oxide yellow pigment manufactured by Honor Pigments for demanding coating and plastics applications. Our TRANSPARENT YELLOW 91176 grade delivers outstanding transparency, top-tier light fastness (Blue Wool 8), and exceptional weather resistance (5/5 dope), making it the go-to choice for formulators who need clean yellow tints without sacrificing durability. Batch-to-batch consistency and easy dispersibility ensure reliable performance across automotive, industrial, and decorative systems.
Product Description – PY42
TRANSPARENT YELLOW 91176 (Pigment Yellow 42) features excellent transparency, enabling vivid, clear yellow hues without masking base layers, ideal for coatings and inks. It offers strong light fastness, good chemical resistance, and easy dispersibility, paired with stable tinting power for consistent performance in various applications.
Recommended Application
Inks: printing inks
Paints: auto paints, wood paints, architecture paints, powder coatings, industry coatings,
Plastics: Rubber
Technical Data
| Product Information | ||||
| Chemical Type | CAS NO. | 51274-00-1 | ||
| C. I. Name | Pigment Yellow 42 | EINECS / ELINCS NO. | 257-098-5 | |
| C. I. Constitution No. | 77492 | Chemical Formula | ||
| Technical Performance | ||||
| Full Shade | Tint | |||
| Weather Resistance | 5 | 5 | Heat Stability °C | 200°C |
| Light Fastness | 8 | 8 | ||
| Physical Properties | ||||
| Physical Form | Powder | UV Absorption | ≥ 95% | |
| Specific Density | 1.2 g/cm³ | Solid Content | 97±2% | |
| PH Value | 5-8 | 105°C Moisture | ≤ 3.0% | |
| Fe₂O₃ Content | ≥ 84% | |||
| Residue (45 μm mesh) | ≤ 0.1% | |||
| Packaging | ||||
| 25kgs/bag 1000kgs/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. | ||||
Application Advantages
PY42 transparent iron oxide yellow is the preferred choice where color clarity meets toughness:
- Automotive Coatings: Rated 5/5 weather resistance with Blue Wool 8 light fastness — ideal for metallic basecoats and OEM finishes where the substrate effect must shine through. Compare with our opaque Iron Oxide Yellow 313 for high-hiding alternatives.
- Industrial Coatings: Heat stability up to 200°C enables reliable use in coil coatings, powder coatings, and high-bake systems without color drift.
- Printing Inks: Fine particle size and easy dispersibility produce clean, transparent yellows in offset, flexo, and gravure processes.
- Plastics & Rubber: Non-migrating and heat-stable — well suited for PVC, polyolefins, and rubber masterbatches.
- Water-Based Systems: Fully compatible with both solvent-borne and water-borne formulations; excellent pH stability (5–8) ensures trouble-free incorporation.
- 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”
Disclaimer – The information given in this data sheet is based on the present state of our knowledge & is intended as a general description of our products & their possible applications. Due to the multitude of formulations, production & application conditions, all the above mentioned data have to be adjusted to the circumstances of the processor. No liabilities, including those for patent rights, can be derived from this fact for individual cases. It cannot be ruled out that this product 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.
Frequently Asked Questions
1. What is the difference between PY42 and PY83?
PY42 is an inorganic transparent iron oxide yellow (iron oxide hydroxide, FeOOH) with superior light fastness (Blue Wool 8) and weather resistance (5/5), making it ideal for exterior and long-life applications. PY83 is a synthetic organic diarylide yellow pigment with higher tinting strength but lower light/weather fastness — better suited for indoor or short-life applications. Browse our PY83 products →
2. What is the maximum heat resistance of PY42?
PY42 TRANSPARENT YELLOW 91176 withstands up to 200°C for 10 minutes without significant shade change, tested in both full shade and tint reductions. This makes it suitable for powder coatings, coil coatings, and most plastic processing temperatures.
3. Is PY42 suitable for water-based coating systems?
Yes. PY42 transparent iron oxide yellow is fully compatible with water-based formulations. With a pH value of 5–8, fine particle size, and excellent dispersibility, it integrates smoothly into water-borne architectural paints, industrial coatings, and printing inks without stability issues.
4. What is the minimum order quantity and how can I get a sample?
Our standard packaging is 25 kg/bag, 1,000 kg/pallet. For trial purposes, we offer free samples (typically 100–500 g) so you can evaluate performance in your own formulation. Contact our sales team to request a free sample, TDS, or SDS — we ship worldwide from our ISO 9001 certified facility.
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.