Description

4-[[3,3'-Dichloro-4'-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(p-Tolyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-2,4-Dihydro-5-Methyl-2-Phenyl-3H-Pyrazol-3-One is a high-performance, complex azo-based organic pigment and dye intermediate. It is valued for its ability to impart intense and stable coloration in demanding applications. This compound is primarily utilized by manufacturers in the pigments, inks, and specialty coatings industries seeking advanced colorant solutions.

Application

• High-Performance Pigments: A key intermediate for manufacturing high-grade organic pigments used in automotive and industrial coatings.
• Printing Inks: Provides vivid and durable coloration for specialty printing inks, including packaging and security inks.
• Plastics and Polymers: Used as a colorant masterbatch for engineering plastics requiring excellent thermal stability and lightfastness.
• Textile Dyes: Serves as a precursor for synthesizing specialized dyes for synthetic fibers.
• Liquid Crystal Displays (LCDs): Potential application in color filters and polarizing films for electronic displays.
• Research & Development: A valuable chemical building block for R&D in novel chromophores and functional dyes.

Basic Information

Product Name	4-[[3,3'-Dichloro-4'-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(p-Tolyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-2,4-Dihydro-5-Methyl-2-Phenyl-3H-Pyrazol-3-One
CAS No.	26841-50-9
Molecular Formula	C39H28Cl2N8O2
Molecular Weight	711.60 g/mol
Synonyms	Pigment Yellow 191; C.I. 18795; 4-[[3,3'-Dichloro-4'-[[4,5-dihydro-3-methyl-5-oxo-1-(4-methylphenyl)-1H-pyrazol-4-yl]azo][1,1'-biphenyl]-4-yl]azo]-5-methyl-2-phenyl-3H-pyrazol-3-one; PY 191; 4-[(3,3'-Dichloro-4'-{[4,5-dihydro-3-methyl-5-oxo-1-(4-methylphenyl)-1H-pyrazol-4-yl]diazenyl}[1,1'-biphenyl]-4-yl)diazenyl]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC and spectrophotometric analysis, to ensure consistent purity and chromatic performance. A detailed Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and compliance with your specifications.

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 incompatible materials and sources of ignition. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Chlorine Content	Conforms to Theoretical

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