Description

3-[[4-[(4-Hydroxyphenyl)Azo]-2,5-Dimethoxyphenyl]Azo]Benzenesulphonic Acid is a specialized azo dye intermediate, valued for its ability to impart vibrant and stable color properties in advanced formulations. Its significance lies in its dual azo chromophore structure, which offers enhanced color strength and potential for fine-tuning shade and fastness characteristics. This compound is essential for manufacturers in the dye and pigment industries seeking to develop high-performance colorants for textiles, inks, and specialty coatings.

Application

• Primary intermediate for the synthesis of high-grade azo dyes and pigments.
• Key component in manufacturing colorants for textile dyeing and printing processes.
• Used in the production of specialized inks for packaging, security printing, and digital applications.
• Potential raw material for functional dyes used in optical data storage or liquid crystal displays (LCDs).
• Intermediate in research and development of novel colorimetric sensors and indicators.
• May serve as a precursor for dyes used in leather coloring and paper coloration.

Basic Information

Product Name	3-[[4-[(4-Hydroxyphenyl)Azo]-2,5-Dimethoxyphenyl]Azo]Benzenesulphonic Acid
CAS No.	61886-19-9
Molecular Formula	C20H18N4O6S
Molecular Weight	442.45 g/mol
Synonyms	Benzenesulfonic acid, 3-[[4-[(4-hydroxyphenyl)azo]-2,5-dimethoxyphenyl]azo]-; C.I. 26050; 3-[(4-[(4-Hydroxyphenyl)diazenyl]-2,5-dimethoxyphenyl)diazenyl]benzenesulfonic acid; Acid Red 4 Precursor; Dual Azo Dye Intermediate; 4-Hydroxy-2',5'-dimethoxy-4-[(3-sulfophenyl)azo]azobenzene; Azo dye intermediate 61886-19-9
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity required for sensitive synthesis. Quality is verified through analytical methods including HPLC, UV-Vis spectroscopy, and titration. A comprehensive Certificate of Analysis (COA) detailing identity, assay, impurity profile, and physical specifications is provided with every shipment to support your quality assurance systems.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

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 ≤ 3.0%
Solubility (Test)	Soluble in alkaline aqueous solutions

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