Description

4,4'-Bis[[4,5-Dihydro-3-Methyl-1-(4-Methylphenyl)-5-Oxo-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid is a high-purity, specialized azo dye intermediate with a complex biphenyl disulphonic acid structure. This compound matters for its role in synthesizing high-performance, colorfast pigments and dyes, offering excellent thermal and chemical stability. It is primarily needed by manufacturers in the textile, ink, and specialty polymer industries seeking to produce vivid and durable colors. The product, identified by CAS NO 79665-32-0, is supplied with consistent quality for demanding industrial applications.

Application

• Primary Intermediate for High-Performance Pigments: A key building block in the synthesis of advanced organic pigments used in automotive coatings, industrial paints, and plastics.
• Textile Dye Manufacturing: Used to produce specialized azo dyes for synthetic fibers like polyester and nylon, valued for their wash-fastness and light-fastness.
• Inkjet and Printing Inks: Serves as a precursor for dyes in high-quality digital printing inks, contributing to color intensity and stability.
• Functional Dyes for Polymers: Incorporated into the production of dyes for coloring engineering plastics and specialty polymers where high-temperature processing is required.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying structure-property relationships in dye chemistry.
• Liquid Crystal Display (LCD) Color Filters: Potential application in the synthesis of dyes for color filters in electronic displays.

Basic Information

Item	Details
Product Name	4,4'-Bis[[4,5-Dihydro-3-Methyl-1-(4-Methylphenyl)-5-Oxo-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid
CAS No.	79665-32-0
Molecular Formula	C44H36N8O8S2
Molecular Weight	869.94 g/mol
Synonyms	4,4'-Bis[(3-methyl-1-p-tolyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)azo]biphenyl-2,2'-disulfonic acid; C.I. Pigment Yellow 183; PY 183; Pigment Yellow 183; 4,4'-[1,1'-Biphenyl]-2,2'-diylbis[azo]bis[4,5-dihydro-3-methyl-1-(4-methylphenyl)-1H-pyrazol-5-one]disulfonic acid; 79665-32-0; 4,4'-Bis(3-methyl-1-(4-methylphenyl)-5-oxo-4,5-dihydro-1H-pyrazol-4-ylazo)biphenyl-2,2'-disulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[[4,5-Dihydro-3-Methyl-1-(4-Methylphenyl)-5-Oxo-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and purity. The material is characterized and tested against established internal specifications, which typically include parameters for assay (HPLC), identity (IR), and impurity profile. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance processes.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which could affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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