Description

5-[[4-[(4-Sulfophenyl)Azo]Phenyl]Azo]-2-[2-[2-Sulfo-4-[[4-[(4-Sulfophenyl)-Onn-Azoxy]Phenyl]-Onn-Azoxy]Phenyl]Ethenyl]Benzenesulfonic Acid is a high-purity, multi-sulfonated azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart intense color and excellent water solubility, making it a critical building block for advanced synthetic dyes. It is primarily sought by manufacturers in the textile, ink, and specialty polymer industries for producing vibrant, wash-fast colors and functional materials.

Application

• Textile Dyeing & Printing: A key intermediate for synthesizing reactive, acid, and direct dyes for cotton, wool, silk, and nylon, offering excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-performance inks for digital, packaging, and security printing applications due to its color strength and solubility.
• Functional Polymer Synthesis: Serves as a monomer or additive to introduce sulfonic acid groups and chromophoric properties into polymers for membranes, sensors, or conductive materials.
• Paper Coloring: Employed in the manufacture of dyes for high-quality paper and cardboard, providing bright and uniform coloration.
• Leather Dyeing: Used in formulations for dyeing leather goods, ensuring deep, penetrating, and durable colors.
• Biological Staining: Potential use as a precursor for histological stains in laboratory and diagnostic applications.
• Analytical Reagents: Can be utilized as a colorimetric indicator or a standard in analytical chemistry methods.
• Research & Development: Serves as a sophisticated chemical building block for academic and industrial R&D in organic synthesis and material science.

Basic Information

Product Name	5-[[4-[(4-Sulfophenyl)Azo]Phenyl]Azo]-2-[2-[2-Sulfo-4-[[4-[(4-Sulfophenyl)-Onn-Azoxy]Phenyl]-Onn-Azoxy]Phenyl]Ethenyl]Benzenesulfonic Acid
CAS No.	72854-06-9
Molecular Formula	C46H32N8O16S4
Molecular Weight	1081.06 g/mol
Synonyms	Benzenesulfonic acid, 5-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-[2-[2-sulfo-4-[[4-[(4-sulfophenyl)azo]phenyl]azo]phenyl]ethenyl]- (CA Index Name); Polyazo dye intermediate with sulfonic acid groups; Trisulfonated bis-azo dye precursor; Acid Black 210 intermediate (related); Direct Black 168 intermediate (related); C.I. 30025 (related color index); Multi-sulfonated aromatic azo compound; Tetrasodium 5-[[4-[(4-sulfonatophenyl)azo]phenyl]azo]-2-[2-[2-sulfo-4-[[4-[(4-sulfonatophenyl)azo]phenyl]azo]phenyl]vinyl]benzenesulfonate (salt form)
EINECS	Contact for details

Quality Control

Our production of 5-[[4-[(4-Sulfophenyl)Azo]Phenyl]Azo]-2-[2-[2-Sulfo-4-[[4-[(4-Sulfophenyl)-Onn-Azoxy]Phenyl]-Onn-Azoxy]Phenyl]Ethenyl]Benzenesulfonic Acid adheres to a stringent quality management system to ensure batch-to-batch consistency and reliability for industrial applications. All materials undergo comprehensive analytical testing, including HPLC for purity and impurity profiling, spectrophotometric analysis for color value, and elemental analysis. A detailed Certificate of Analysis (COA) documenting identity, purity, and key physical parameters is provided with every shipment to 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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