Description

2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-5-[[2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-4-hydroxybenzoyl]amino]benzoic acid is a high-purity, complex azo dye intermediate with a symmetrical bis-pyrazolone structure. This compound is engineered to deliver exceptional color strength and thermal stability in demanding applications, making it a critical component for advanced colorant formulations. It is primarily required by manufacturers in the specialty dyes and pigments, high-performance inks, and polymer coloration industries seeking to produce vibrant, durable hues.

Application

• High-Performance Pigments: A key intermediate for synthesizing high-grade organic pigments used in automotive coatings, industrial paints, and plastics.
• Specialty Dyes: Manufacturing of azo dyes for textile fibers, leather, and paper that require excellent lightfastness and wash fastness.
• Advanced Inks: Formulation of inks for security printing, packaging, and digital applications where color consistency and stability are paramount.
• Polymer Colorants: Masterbatch production for coloring engineering plastics, synthetic fibers, and films.
• Research & Development: Serving as a precise chemical building block in R&D for novel chromophores and functional materials.
• Optical Materials: Potential use in the development of non-linear optical (NLO) materials and dyes for laser applications.

Basic Information

Product Name	2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-5-[[2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-4-hydroxybenzoyl]amino]benzoic acid
CAS No.	84963-13-3
Molecular Formula	C39H30N10O7
Molecular Weight	750.72 g/mol
Synonyms	Bis(4-amino-3-methyl-1-phenyl-2-pyrazolin-5-one) coupled diazo component; CI 26080 (related); Azo dye intermediate based on 1-phenyl-3-methyl-5-pyrazolone; 5-[[2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-4-hydroxybenzoyl]amino]-2-[[1-(4-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]benzoic acid; Symmetrical bis-azo pyrazolone derivative; 4,4'-((4-Carboxy-1,3-phenylene)bis(azanediyl))bis(4-oxobut-2-enediyl))bis(azan-1-yl-1-ylidene))bis(2-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-4,1-diyl))dibenzoic acid (alternative IUPAC); Aminophenyl methyl pyrazolone azo benzoic acid.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems, ensuring batch-to-batch consistency and reliability. Every lot is analyzed using advanced techniques like HPLC and NMR to verify identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all specification parameters is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is light-sensitive and easily oxidized; prolonged exposure to light, air, or elevated temperatures should be avoided to maintain stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%

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