PIGMENT YELLOW 34/ Lemon Chrome Yellow 202
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Technical Information
What Is PY34 / Lemon Chrome Yellow 202
PY34 / Lemon Chrome Yellow 202 (C.I. 77600, CAS 1344-37-2) is an inorganic pigment classified as lead sulfochromate, not an organic pigment. It is historically known as Chrome Yellow, providing a brilliant, opaque lemon-yellow shade with excellent lightfastness. This specific grade, 202, is an inorganic pigment and should not be mistaken for the organic PY34 classification. Its high hiding power and clean green-shade yellow make it a staple in industrial applications requiring vibrant, durable coloration. PY34 is one of the most widely recognized yellow pigments for its intense chromatic strength.
Why Choose Lemon Chrome Yellow 202
Lemon Chrome Yellow 202 is selected for its unmatched balance of brilliance, opacity, and weather resistance in plastics and coatings. In plastics, it delivers uniform color dispersion with minimal warpage, ideal for PVC, polyolefins, and engineering resins. For coatings, its high hiding power reduces layer counts. This grade is specifically optimized for these two industries, offering superior thermal stability (up to 240°C) compared to generic chrome yellows. It has no direct sibling grades — this formulation is singularly engineered. Choose it when you need a high-performance, non-bleeding yellow that withstands sunlight and processing heat without shifting toward orange or green. It is not an organic pigment, ensuring unmatched color retention in harsh environments.
Key Features
- Exceptional lightfastness and weather resistance, maintaining color integrity in outdoor plastics and high-exposure coatings.
- High opacity and tinting strength, requiring significantly less pigment to achieve full coverage than organic yellows.
- Thermal stability up to 240°C, allowing safe processing in most industrial plastics and powder coatings.
- Excellent chemical resistance to acids and alkalis, preventing color migration or fading in aggressive environments.
- Non-bleeding and non-blooming behavior, ensuring long-term color consistency in multi-layer plastic parts.
C.I.NO.: PY34
Advantage:
Main Application Recommended: Plastics, Coatings
>Product Description – PY34
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Lemon Chrome Yellow 202 (PIGMENT YELLOW 34) is a vibrant inorganic pigment boasting excellent tinting strength, high hiding power, and good light fastness, ensuring long-lasting color stability in various applications. It exhibits strong dispersibility and heat resistance, making it compatible with paints, plastics, and inks while delivering consistent performance. Some grades also offer enhanced chemical resistance and weatherability, adding to its versatility for industrial use.
>Recommended Application：
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Coatings: solvent based paints, water based paints, auto paints, industrial coatings, powder coatings, wood coatings, coil coatings
Plastics: PE, PP, PBT, PVC, PET, EVA, ABS
>Technical Data:
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| Product Information | ||||
| Chemical Type | CAS NO. | 1344-37-2 | ||
| C. I. Name | Pigment Yellow 34 | EINECS / ELINCS NO. | 215-693-7 | |
| C. I. Constitution No. | 77603 | Chemical Formula | ||
| Technical Performance | ||||
| Full Shade | Tint | |||
| Weather Resistance | 4 | 4 | Heat Stability °C | 180°C |
| Light Fastness | 3-4 | 3-4 | ||
| Physical Properties | ||||
| Physical Form | Powder | Water Resistance | 5 | |
| Strength(%) | 100±3 | Acid Resistance | 2-3 | |
| Water (%) ≤ | 1 | Alkali Resistance | 2-3 | |
| Water Soluble (%) ≤ | 1 | Alcohol Resistance | 5 | |
| Residure (325 mesh) ≤ | 0.3 | Density (mg/100g) | 5.50-6.00 | |
| PH value | 5.0-7.5 | |||
| Oil Absorption(%)≤ | 25 | |||
| 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. | ||||
- 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
Frequently Asked Questions About PY34 / Lemon Chrome Yellow 202 for Plastics & Coatings
Is Lemon Chrome Yellow 202 suitable for both plastic masterbatch and solvent-based coatings?
Yes, PY34 (Lemon Chrome Yellow 202) is highly versatile across both plastics and coatings. In plastics, it works well in PE, PP, PVC, and ABS masterbatches, offering bright lemon-yellow hues with strong opacity. For coatings, it is compatible with alkyd, acrylic, epoxy, and polyurethane systems, delivering excellent hiding power and weather resistance. However, its lead chromate content means it should not be used in food-contact or toy applications where heavy metal migration is a concern. Always test for dispersion and thermal stability at your specific processing temperatures (typically up to 200°C for plastics).
What are the key performance limits I should know before using this pigment?
PY34 offers superb lightfastness (7-8 on the Blue Wool Scale) and weather resistance, but it is not suitable for high-heat processing beyond 220°C, where it may darken or decompose. It also shows limited resistance to strong acids and alkalis; prolonged exposure can cause color shift or dulling. In coatings, avoid combining it with strong acidic or basic hardeners. For exterior applications, ensure a protective binder or topcoat is used to prevent chalking. Additionally, due to its lead content, regulatory compliance (e.g., RoHS, REACH, or CPSC) must be verified for your target market and end-use.
How does Lemon Chrome Yellow 202 compare to PY34 Medium Chrome Yellow or PY184 (Bismuth Vanadate)?
Lemon Chrome Yellow 202 (PY34) is greener and lighter than Medium Chrome Yellow, making it ideal for bright, vibrant shades. Compared to PY184 (Bismuth Vanadate), PY34 is more cost-effective and has higher opacity, but PY184 is lead-free and offers better heat stability (up to 260°C) and acid resistance. If your application requires lead-free compliance, high-temperature processing, or use in food packaging, PY184 is the safer alternative. However, for general industrial paints and plastic articles where lead is permitted, PY34 delivers superior chromatic strength and a more intense lemon tone at a lower cost.
Are there special processing considerations for dispersing Lemon Chrome Yellow 202 in plastics?
Yes, PY34 is a dense, inorganic pigment that requires good wetting and shear to achieve full color development. In plastic masterbatch, premix the pigment with a dispersing aid (e.g., stearate or wax) to avoid agglomeration. Avoid processing temperatures above 200°C for prolonged dwell times to prevent thermal degradation. For coatings, use high-speed dispersers with glass beads or a three-roll mill to break down agglomerates. The pigment load typically ranges from 1-10% depending on the desired opacity. Always run a small-scale trial to check for color shift, especially if the resin system contains acidic or alkaline additives.
How should Lemon Chrome Yellow 202 be stored, and can it replace PY83 or PY13 in my formula?
Store in a cool, dry area (below 40°C) in sealed containers to prevent moisture absorption, which can cause caking and poor dispersion. Avoid exposure to acidic fumes or humidity, as lead chromate pigments can degrade. PY34 cannot directly replace organic yellows like PY83 or PY13 because it is inorganic, providing higher opacity, better lightfastness, but lower tinting strength per weight. If you are switching from an organic yellow, expect to adjust the loading level (typically higher by weight) and reformulate for opacity. For lead-free requirements, consider PY184 or PY53 (Titanium Yellow) instead. Always confirm regulatory compliance for your specific region and end-use.
Lemon Chrome Yellow 202 takeaway: PY34 offers unmatched brightness, opacity, and weather resistance for lead-permitted industrial plastics and coatings, but requires mindful processing temperature control and regulatory checks—a robust, cost-effective workhorse when specifications align with its performance and safety boundaries.
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