Description

4,4'-Bis[[1-[[(2-Methylphenyl)Amino]Carbonyl]-2-Oxopropyl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid is a high-purity, specialized azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring disulphonic acid groups and multiple azo linkages, makes it a critical precursor for synthesizing high-performance pigments and dyes. This compound is essential for manufacturers in the colorant industry seeking to produce vivid, stable, and lightfast colors for demanding applications.

Application

This advanced chemical intermediate serves as a key building block in the synthesis of complex colorants. Its primary and related applications include:

• Precursor for High-Performance Pigments: Synthesis of azo pigments for plastics, coatings, and inks requiring excellent thermal stability and weatherability.
• Specialty Dye Manufacturing: Production of acid dyes and direct dyes for textile fibers such as nylon, silk, wool, and paper.
• Functional Colorants: Development of dyes for non-textile applications, including leather coloring and food packaging inks (where compliant with relevant regulations).
• Research & Development: Serving as a standard or starting material in chemical research for novel chromophore development and material science.
• Industrial Ink Formulations: Used in the creation of inks for digital printing and other industrial marking applications.

Basic Information

Product Name	4,4'-Bis[[1-[[(2-Methylphenyl)Amino]Carbonyl]-2-Oxopropyl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid
CAS No.	79665-34-2
Molecular Formula	C44H38N6O10S2
Molecular Weight	875.93 g/mol
Synonyms	4,4'-Bis[(1-((2-methylphenyl)carbamoyl)-2-oxopropyl)azo]biphenyl-2,2'-disulfonic Acid; C.I. Acid Yellow 220; Acid Yellow 220; Azo Dye Intermediate Yellow 220; 2,2'-(4,4'-Biphenylylene)bis[1-[[(2-methylphenyl)amino]carbonyl]-2-oxopropyl]azo]disulfonic Acid; 79665-34-2; [1,1'-Biphenyl]-2,2'-disulfonic acid, 4,4'-bis[[1-[[(2-methylphenyl)amino]carbonyl]-2-oxopropyl]azo]-
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[[1-[[(2-Methylphenyl)Amino]Carbonyl]-2-Oxopropyl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chemical structure, and batch-to-batch reproducibility, meeting the exacting standards required for dye and pigment synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. 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 to Structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in DMF)	Clear Solution

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