Description

4-[[4-[[4-[[(4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol)-4-yl]azo]-2,5-dimethylphenyl]phenylmethyl]-2-methylphenyl]azo]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one is a high-performance, complex azo pyrazolone derivative. This compound matters for its ability to provide intense and stable coloration, making it a critical component in the formulation of advanced pigments and dyes. It is primarily needed by manufacturers in the coatings, plastics, and specialty ink industries seeking durable and vibrant colorants.

Application

• High-Performance Pigments: A key intermediate for manufacturing organic pigments used in automotive coatings, industrial paints, and powder coatings requiring excellent weatherfastness and thermal stability.
• Plastics and Polymer Coloring: Used in the coloration of engineering plastics, synthetic fibers, and masterbatches where high dispersion and color strength are critical.
• Specialty Inks: Formulation of high-quality printing inks, including packaging inks and security inks, for superior print quality and resistance properties.
• Advanced Material Coatings: Application in coatings for consumer electronics and other materials demanding specific aesthetic and functional color properties.
• Research & Development: Serves as a valuable chemical entity for R&D in novel dye and pigment synthesis, material science, and photochemical studies.

Basic Information

Product Name	4-[[4-[[4-[[(4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol)-4-yl]azo]-2,5-dimethylphenyl]phenylmethyl]-2-methylphenyl]azo]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one
CAS No.	72391-19-6
Molecular Formula	C46H38N8O2
Molecular Weight	734.85 g/mol
Synonyms	Pigment Yellow 191; C.I. 12995; 4-[[4-[[4-[[(4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2,5-dimethylphenyl]phenylmethyl]-2-methylphenyl]azo]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one; PY 191; Azo Pyrazolone Yellow 191; 1H-Pyrazol-3-one, 4,4'-(phenylmethylene)bis[4-[(2,5-dimethylphenyl)azo]-2,4-dihydro-5-methyl-2-phenyl-; Bisazo pyrazolone pigment
EINECS	Contact for details

Quality Control

Our production of 4-[[4-[[4-[[(4,5-Dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol)-4-yl]azo]-2,5-dimethylphenyl]phenylmethyl]-2-methylphenyl]azo]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analytical testing, including purity assay, shade strength, and physical property evaluation. Certificates of Analysis (COA) documenting all critical specifications are available upon request to support your quality assurance protocols.

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. The product is light-sensitive and should be handled accordingly to maintain its chemical integrity.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	95 - 105% (vs. Standard)
Ash Content	≤ 1.0%
Moisture Content (KF)	≤ 1.0%
Particle Size (D50)	Contact for details

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