Description

Disodium 4-[[4-[Bis[4-[(4-Sulphonatophenyl)Amino]Phenyl]Methylene]Cyclohexa-2,5-Dien-1-Ylidene]Amino]Benzenesulphonate is a high-purity, water-soluble anionic dye intermediate of significant commercial importance. Its complex, multi-sulfonated structure makes it a critical precursor for synthesizing advanced colorants with excellent lightfastness and washfastness properties. This compound is essential for manufacturers in the dye and pigment industries seeking to produce high-performance, environmentally compatible dyes for textiles, inks, and specialty coatings.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton, wool, and polyamide fibers.
• Direct Dye Synthesis: Used in the production of direct dyes for paper and textile applications requiring deep, vibrant colors.
• Functional Dye Manufacturing: Serves as a precursor for dyes used in ink-jet printing inks, leather coloring, and food colorants (where specific purity grades are met).
• Research & Development: Employed in academic and industrial R&D for developing novel chromophores and studying dye-substrate interactions.
• Specialty Chemical Synthesis: Acts as a functional intermediate in the creation of photoactive compounds and other advanced materials.

Basic Information

Product Name	Disodium 4-[[4-[Bis[4-[(4-Sulphonatophenyl)Amino]Phenyl]Methylene]Cyclohexa-2,5-Dien-1-Ylidene]Amino]Benzenesulphonate
CAS No.	6415-98-1
Molecular Formula	C37H26N4Na2O9S3
Molecular Weight	828.78 g/mol
Synonyms	Disodium 4-[(4-{Bis[4-(4-sulfonatoanilino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)amino]benzenesulfonate; C.I. Direct Yellow 50; Direct Fast Yellow GC; Direct Yellow 50; Direct Yellow GC; Pontamine Fast Yellow GC; Sirius Supra Yellow GC; Benzenesulfonic acid, 4-[[4-[bis[4-[(4-sulfophenyl)amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]amino]-, disodium salt
EINECS	229-139-5

Quality Control

Our Disodium 4-[[4-[Bis[4-[(4-Sulphonatophenyl)Amino]Phenyl]Methylene]Cyclohexa-2,5-Dien-1-Ylidene]Amino]Benzenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance as a dye intermediate. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility are provided to guarantee compliance with your technical specifications and 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 a controlled room temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure the container is resealed tightly after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brownish-yellow to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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