Description

4-[[5-[(2,4-Dimethylphenyl)Azo]-2,4-Dihydroxyphenyl]Azo]Benzenesulfonic Acid is a specialized azo dye intermediate of significant commercial importance. Its value lies in its ability to impart specific color properties and act as a key building block in the synthesis of complex dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants with specific fastness and solubility characteristics.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial precursor in the synthesis of high-value, complex azo dyes used in textile dyeing and printing.
• Textile Industry Colorant: Used in the production of dyes for coloring natural and synthetic fibers, valued for its potential to create specific shades and improve color fastness.
• Ink Formulation: Employed in the manufacturing of industrial and specialty printing inks, contributing to color strength and stability.
• Functional Dye Synthesis: Acts as a key component in the development of functional dyes for applications in electronics, imaging, or sensors.
• Research & Development: Utilized in chemical R&D laboratories for the development of novel chromophores and dye molecules.
• Specialty Chemical Manufacturing: Incorporated into the production chain for various specialty chemicals requiring specific color or light-absorbing properties.

Basic Information

Product Name	4-[[5-[(2,4-Dimethylphenyl)Azo]-2,4-Dihydroxyphenyl]Azo]Benzenesulfonic Acid
CAS No.	72138-98-8
Molecular Formula	C20H18N4O5S
Molecular Weight	426.45 g/mol
Synonyms	Benzenesulfonic acid, 4-[[5-[(2,4-dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]-; 4-((5-((2,4-Dimethylphenyl)diazenyl)-2,4-dihydroxyphenyl)diazenyl)benzenesulfonic acid; Azo dye intermediate 72138-98-8; 2,4-Dihydroxy-5-[(2,4-dimethylphenyl)azo]azobenzene-4'-sulfonic acid; C.I. Acid Orange 156 (related); Disperse dye intermediate; Sulfonated azo dye precursor
EINECS	Contact for details

Quality Control

Our 4-[[5-[(2,4-Dimethylphenyl)Azo]-2,4-Dihydroxyphenyl]Azo]Benzenesulfonic Acid is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and physical specifications is provided with each shipment to guarantee compliance with your application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient 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 to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%
Solubility	Soluble in alkaline aqueous solutions

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