Pigment Yellow 191

Brand	Fineland Chem
Color Index	Pigment Yellow 191
Color Index No	18795
CAS No	129432-54-7
EC No	403-530-4
Chemical Group	Azo Lake
Chemical Formula	C17H13CaClN4O7S

Introduction

Pigment Yellow 191 (CAS 129432-54-7) is a mono-azo calcium salt lake pigment with the formula C17H13CaClN4O7S , offers vivid reddish-yellow color, exceptional heat resistance up to 300°C in HDPE, high lightfastness (ISO 7–8), and excellent migration/solvent resistance for plastics, coatings, and inks.

Best Selling

PY191 – DuraPlast®HGR-1 ⬇️TDS

This grade stands out for its high cost-performance ratio, delivering vivid reddish-yellow hue, heat resistance up to 300°C, lightfastness ISO 7–8, and migration/solvent resistance at a competitive price for plastics(PO, PVC, EVA),Also use in PS,ABS.

Physical Properties

Test Item	Specification
Density (g/cm3 )	1.7-1.8
Specific Surface Area(m2/g)	10-30
Oil Absorption(g/100g)	30-60
PH Value	5.0-7.5
Bulk Density (lb/gal)	3-5
Total impurities(ppm)≤	600

Fastness Properties (5=excellent, 1=poor) | Light Fastness (8=excellent, 1=poor)

Heat Resistance (℃)	300	Alkali Resistance (1-5)	5
Light Resistance (Full Shade, 1-8)	7	Migration Resistance(1-5)	5
Light (Reduced tinting, 1-8)	6-7	Ethyl Acetate (1-5)	4
Weather Resistance (1-5)	4	Ethanol (1-5)	4
Acid Resistance (1-5)	5	MEK (1-5)	4

Application

Pigment yellow 191 application:
Recommended for color plastic compound. In HDPE, its heat resistance can be 300 degrees centigrade, and no dimensional deformation. It has good migration resistance in the PVC. Also can be used for paint, mainly for road marking paint.

Application

Printing Ink: Discover high-performance ink pigments for various printing technologies including water-based, solvent-based, offset, inkjet, UV curing, and decorative applications. More Details

Paint and Coating: Explore a wide range of coating pigments tailored for paints, oils, automotive finishes, industrial applications, concrete, cement, and ceramics. More Details

Plastic: Browse a comprehensive selection of plastic pigments designed for PE, PVC, EVA, rubber, and a variety of engineering plastics. More Details

Special Applications: Find specialized pigments offering unique effects and functionalities for textiles, resins, glazes, metallic finishes, fluorescence, and anti-corrosion needs. More Details

Package and Delivery

● 25KG Kraft bag, 400KG Carton Box.
● Lead Time: Normally around 15 days after signed contract.

Advantages

1. Exceptional Cost-Effective Performance

Delivers premium features (heat resistance up to 300°C in HDPE, lightfastness ISO 7–8, and solvent resistance) at a lower cost than high-end pigments, ideal for large-scale plastic coloring (polyolefins, PVC) and coatings.

2. Superior Heat Stability

Withstands temperatures up to 330°C in polycarbonate and 300°C in HDPE without thermal decomposition or dimensional distortion, enabling use in high-temperature plastic processing and powder coatings.

3. Outstanding Light and Weather Resistance

Maintains vivid reddish-yellow hue under prolonged UV exposure (lightfastness 7–8), suitable for outdoor products like automotive parts, agricultural films, and architectural coatings.

4. Excellent Migration and Chemical Resistance

Resists migration in plasticized PVC and solvents, complying with food packaging regulations (FDA, EU standards), and withstands acids/alkalis for industrial coatings.

5. Wide Material Compatibility

Works in thermoplastics (PP, PS), engineering resins, water/solvent-based paints, and printing inks, reducing formulation complexity for manufacturers.