Description

C.I. 15585:3 CAS NO 73263-40-8 is a high-performance, synthetic organic pigment belonging to the diarylide yellow chemical class. This pigment is valued for its excellent color strength, good lightfastness, and strong solvent resistance, making it a critical component for durable coloration. It is primarily sought after by manufacturers in the coatings, plastics, and printing ink industries who require stable and vibrant yellow hues for their products.

Application

• Industrial Coatings: Used in automotive OEM and refinish paints, industrial maintenance coatings, and coil coatings for its durability and weather resistance.
• Plastics Coloring: An essential colorant for the mass coloration of polymers such as PVC, polyolefins, and engineering plastics, offering good heat stability and dispersion.
• Printing Inks: A key pigment for producing high-quality publication gravure, flexographic, and packaging inks, providing strong color value and print performance.
• Specialty Applications: Suitable for coloring specialty papers, artists' colors, and other applications requiring a clean, green-shade yellow.

Basic Information

Item	Detail
Product Name	C.I. 15585:3
CAS No.	73263-40-8
Molecular Formula	C₃₂H₂₆Cl₂N₆O₄
Molecular Weight	629.49 g/mol
Synonyms	Pigment Yellow 155; Diarylide Yellow AAA; C.I. Pigment Yellow 155; Benzidine Yellow AAA; Permanent Yellow G; Yellow Pigment 155; 3,3'-[(3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-methyl-2,6-bis(phenylamino)benzoic acid]; 73263-40-8
EINECS	Contact for details

Quality Control

Our production of C.I. 15585:3 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, hue, particle size distribution, and rheological properties. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Residual Solvents	≤ 0.5% (GC)
Particle Size (D50)	≤ 0.5 μm
Ash Content	≤ 1.0%
pH Value (10% Slurry)	6.0 - 8.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.