Description

5-[[4-[(4-Sulfophenyl)Azo]Phenyl]Azo]-2-[2-[2-Sulfo-4-[[4-[(4-Sulfophenyl)-Onn-Azoxy]Phenyl]Azo]Phenyl]Ethenyl]Benzenesulfonic Acid Tetrasodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart strong, vibrant color and its role as a key building block in the synthesis of complex dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply chains for their production processes.

Application

This specialized azo compound serves as a critical intermediate in various colorant manufacturing processes. Its primary and derived applications include:

• Primary Intermediate for Reactive Dyes: Used in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Production of Acid Dyes: A key precursor for manufacturing acid dyes used on wool, silk, and nylon.
• Direct Dye Synthesis: Employed in creating direct dyes for paper coloring and textile applications.
• Pigment Manufacturing: Acts as a starting material for producing lakes and insoluble organic pigments.
• Ink Formulations: Used in the production of colorants for specialty printing inks.
• Research & Development: Serves as a standard or building block in chemical R&D for novel chromophores and functional materials.

Basic Information

Item	Details
Product Name	5-[[4-[(4-Sulfophenyl)Azo]Phenyl]Azo]-2-[2-[2-Sulfo-4-[[4-[(4-Sulfophenyl)-Onn-Azoxy]Phenyl]Azo]Phenyl]Ethenyl]Benzenesulfonic Acid Tetrasodium Salt
CAS No.	72854-04-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Yellow 142; Tetrasodium 5-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-[2-[2-sulfo-4-[[4-[(4-sulfophenyl)diazenyl]phenyl]diazenyl]phenyl]ethenyl]benzenesulfonate; Direct Yellow 142; Benzenesulfonic acid, 5-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-[2-[2-sulfo-4-[[4-[(4-sulfophenyl)azo]phenyl]azo]phenyl]ethenyl]-, tetrasodium salt; Azo dye intermediate YA; Light Yellow 4GL Intermediate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for industrial synthesis. Every lot is analyzed against established specifications for critical parameters such as assay, impurity profile, and solubility. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 can affect product performance.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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