Description

3-[[4-[(4-Hydroxyphenyl)Azo]-2,5-Dimethoxyphenyl]Azo]Benzenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure, which provides consistent color-forming properties and reactivity in specialized synthesis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories developing colorimetric assays and diagnostic reagents.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key building block in the synthesis of high-performance, water-soluble azo dyes for textiles, inks, and coatings.
• Analytical Chemistry Reagent: Used in the development of colorimetric indicators and sensors for detecting specific ions or biomolecules in laboratory settings.
• Specialty Chemical Synthesis: Serves as a functionalized intermediate for creating more complex chemical entities in pharmaceutical and agrochemical research.
• Biological Staining: Potential application in histological stains for microscopy due to its chromogenic azo groups.
• Research & Development: Utilized in academic and industrial R&D for studying azo coupling reactions and photochemical properties.

Basic Information

Product Name	3-[[4-[(4-Hydroxyphenyl)Azo]-2,5-Dimethoxyphenyl]Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	68516-60-9
Molecular Formula	C20H17N4O6SNa
Molecular Weight	464.43 g/mol
Synonyms	Sodium 3-[[4-[(4-hydroxyphenyl)azo]-2,5-dimethoxyphenyl]azo]benzenesulfonate; Benzenesulfonic acid, 3-[[4-[(4-hydroxyphenyl)azo]-2,5-dimethoxyphenyl]azo]-, sodium salt; C.I. 14720; Acid Red 4; 3-[(4-[(4-Hydroxyphenyl)diazenyl]-2,5-dimethoxyphenyl)diazenyl]benzenesulfonic acid sodium salt; Sodium 3-((4-((4-hydroxyphenyl)diazenyl)-2,5-dimethoxyphenyl)diazenyl)benzenesulfonate; Azo dye intermediate 68516-60-9
EINECS	Contact for details

Quality Control

Our 3-[[4-[(4-Hydroxyphenyl)Azo]-2,5-Dimethoxyphenyl]Azo]Benzenesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use as a dye intermediate and reagent. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are available upon request 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Residue on Ignition (Sulfated Ash)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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