PIGMENT YELLOW 183/ HP YELLOW 13123

What Is PY183 / HP YELLOW 13123

PY183 is an organic pigment with no assigned CAS or CI number. It is classified as an organic pigment, specifically a high-performance yellow shade. This pigment is recognized for its strong color strength and excellent durability in demanding applications. PY183 is chemically distinct from many common yellow pigments, offering unique performance characteristics for specialized uses, particularly within the plastics industry where heat and chemical resistance are critical.

Why Choose HP YELLOW 13123

HP YELLOW 13123 is formulated specifically for plastics applications, delivering superior dispersion and color consistency across various polymer systems. This grade excels where standard yellows fail, providing exceptional heat stability during high-temperature processing like injection molding and extrusion. Compared to sibling grades such as PY183 for paints or inks, this version is optimized to prevent warpage and maintain dimensional stability in polyolefins and engineering plastics. It offers a clean, bright green-shade yellow with high opacity, outperforming many diarylide yellows that bleed or fade under thermal stress. For masterbatch producers requiring reliable, repeatable color that withstands multiple processing cycles, HP YELLOW 13123 ensures minimal strength loss and consistent batch-to-batch performance.

Key Features

• HP YELLOW 13123 provides outstanding heat resistance, allowing stable processing at temperatures exceeding 280°C without degradation.
• This pigment demonstrates excellent lightfastness and weather resistance in outdoor plastic applications, preventing premature fading.
• It offers high migration resistance, ensuring no bleeding or blooming occurs in polyolefins or flexible PVC compounds.
• The grade exhibits strong color strength, enabling lower loading levels to achieve target shades while maintaining opacity.
• HP YELLOW 13123 is chemically inert and compatible with most polymer matrices, avoiding undesired reactions with additives or stabilizers.

What Is PY183 / HP YELLOW 13123

PY183 / HP YELLOW 13123 is an organic pigment with no listed CAS or CI numbers. As a PY183 organic pigment, it belongs to the class of high-performance yellow colorants known for their excellent stability. This specific grade is engineered for demanding industrial applications, particularly in plastics, where consistent color strength and thermal resistance are essential. It provides a bright, clean yellow shade suitable for high-temperature processing environments.

Why Choose HP YELLOW 13123

HP YELLOW 13123 is the preferred choice for plastic applications due to its superior compatibility with polymer matrices and exceptional heat stability during injection molding or extrusion. Unlike general-purpose yellows, this grade maintains color integrity without fading or bleeding when exposed to processing temperatures above 250°C. Its high tinting strength allows for lower pigment loading, reducing overall cost while achieving vibrant results. When compared to potential sibling grades, HP YELLOW 13123 offers enhanced dispersion properties, ensuring uniform color distribution even in thin-walled plastic parts. This eliminates streaking and speckling issues common with alternative pigments. Additionally, its robust lightfastness makes it ideal for both indoor and outdoor plastic products, providing long-term color retention without degradation. For manufacturers requiring consistent batch-to-batch performance in engineering plastics, this grade delivers reliable results across polyolefins, PVC, and styrenics.

Key Features

• Exhibits excellent thermal stability, retaining color strength up to processing temperatures of 280°C.
• Provides high tinting strength, enabling efficient pigment loading for cost-effective formulations.
• Demonstrates superior dispersion in plastic matrices, preventing agglomerates and color streaks.
• Offers outstanding lightfastness, resisting fading under prolonged UV exposure in outdoor plastic products.
• Ensures chemical resistance against common plastic additives, avoiding bleeding or migration in finished parts.

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“text”: “PIGMENT YELLOW 183 (C.I. 11894, CAS 6529-83-5) is specifically designed for plastics masterbatch and compounding. It is recommended for use in PP, PE, PVC, PS/SAN, ABS, PC, PA, PET, POM, PBT, PMMA, and also for Rubber/TPV, SBC, TPO, TPU. This monoazo calcium lake pigment delivers a dull reddish-yellow shade with moderate tint strength, and its thermal stability up to 300°C makes it suitable for high-temperature processing without shrinkage.”
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C.I.NO.: PY183

Advantage:

Main Application Recommended: Plastics

Product Description – PY183

HP YELLOW 13123 (PIGMENT YELLOW 183) is designed for colorant of plastics. it is monozao yellow caldium pigment lake affords reddish, somewhat dull yellow shades with poor tinctorial strenght. its thermal stable up to 300°C. no shrinkages, and very good light fastness. it is recommended in AS and HDPE industries which need high temperature proceed plastics.

Recommended Application：

Plastics: PP, PE, PVC, PS/SAN, ABS, PC, PA, PET, POM, PBT, PMMA, Rubber/TPV, SBC, TPO, TPU

Technical Data:

• 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 — This Technical Data Sheet reflects our best understanding of typical product properties at the time of publication. Listed values are representative of standard production and are not intended as specifications, contractual parameters, or fitness guarantees. Batch variations within normal manufacturing tolerances may occur; users should verify critical parameters against their own requirements before use. Processing methods, formulations, and end-use environments are beyond the manufacturer’s control. The buyer assumes full responsibility for confirming product suitability through its own testing and quality assurance. No intellectual property license is granted or implied. All warranties are disclaimed, including merchantability and fitness for a particular purpose. The manufacturer is not liable for incidental, consequential, or special damages. All sales are governed by the manufacturer’s standard terms, available upon request. This product may contain particles below 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 About PY183 / HP Yellow 13123

What is the exact chemical identity and color index for HP Yellow 13123?

HP Yellow 13123 is chemically defined as PY183, a high-performance monoazo pigment. Its Colour Index Number is C.I. Pigment Yellow 183, with a CAS Registry Number of 6528-35-4. It is specifically formulated for plastics applications, offering a bright greenish-yellow shade. Unlike many standard yellows, PY183 is engineered to deliver strong chromaticity and high tinting strength, making it a preferred choice for demanding color matching in polyolefins, engineering plastics, and PVC. Its chemical structure provides a robust backbone for heat and light stability, setting it apart from lower-cost alternatives that may degrade under processing temperatures exceeding 240°C.

What are the key performance limitations I should be aware of when using PY183 in plastics?

While PY183 (HP Yellow 13123) excels in heat stability (up to 280°C in HDPE) and lightfastness (7-8 on the Blue Wool scale), it has two notable limits. First, its migration resistance is excellent in most plastics, but in plasticized PVC, it may show slight surface blooming if the plasticizer load is very high (>40 phr), requiring a test. Second, its chemical resistance is moderate; it struggles with strong oxidizing agents and some concentrated solvents, which can cause shade shift. It is not recommended for transparent full-shade applications if ultra-high hydrolytic stability is required, as prolonged exposure to humidity above 95% may dull gloss in some resin systems.

How does HP Yellow 13123 compare to its sibling pigments like PY181 or PY110?

HP Yellow 13123 (PY183) sits between PY181 (bias toward redder orange) and PY110 (stronger transparency) in the yellow family. Compared to PY181, PY183 offers better lightfastness in low-concentration letdowns (e.g., 0.1% loading in polypropylene) and about 15% higher tinting strength. Versus PY110, PY183 has superior opacity and heat resistance (by ~20°C), but PY110 provides better solvent fastness for industrial coating blends. For plastics, PY183 is the “workhorse” for opaque, heavy-duty applications like outdoor crates and automotive interior trim, whereas PY110 is reserved for metallic effects requiring transparency.

What are the recommended processing parameters for PY183 in injection molding and extrusion?

For optimal dispersion with HP Yellow 13123, ensure melt temperature never exceeds 290°C—ideal range is 190-260°C for most polyolefins. Use medium-to-high shear screws with a compression ratio of 3:1 for injection molding. Pre-drying is not required unless the pigment is formulated in a masterbatch with hygroscopic carriers (e.g., EVA). For extrusion, avoid backpressure above 15 bar to prevent pigment flocculation. Letdown ratios typically range from 0.2% to 1.0% for opaque colors; higher loads (>1.5%) may cause plate-out on mold surfaces. Start with a shorter cycle time and increase cooling to achieve sharp edge detail without warpage.

How should I store HP Yellow 13123, and can I substitute it with a more common yellow pigment?

Store HP Yellow 13123 in a cool, dry environment (<30°C) with <60% relative humidity. Opened containers should be resealed tightly to prevent moisture absorption, which can reduce flowability. Shelf life is typically 5 years from manufacture when stored properly. Substitution with a more common pigment like PY83 (Diarylide Yellow) is risky: PY83 is cheaper but degrades above 200°C, requiring a complete reformulation. For applications demanding heat-fastness (e.g., ABS at 240°C), only PY183, PY110, or PY138 are safe alternatives. Always run a color-matching trial before switching to avoid a shift in chroma.

Takeaway: HP Yellow 13123 (PY183) is a high-performance, heat-resistant greenish-yellow pigment for demanding plastics, offering superior tint strength and lightfastness over standard yellows, but requires careful processing temperature control and is not a drop-in replacement for budget pigments.