Description

5-Chloro-2-Hydroxy-3-[[2-Hydroxy-4-[[(4-Methylphenyl)Sulfonyl]Oxy]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and specialty chemical. This compound is valued for its precise molecular structure, which is critical for synthesizing dyes and pigments with specific coloristic properties and stability. It is primarily required by manufacturers in the dye and pigment, textile, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for the synthesis of specific azo dyes and pigments.
• Manufacturing of textile dyes requiring high lightfastness and washfastness.
• Production of specialty colorants for inks, coatings, and plastics.
• Research and development of novel functional dyes for analytical or electronic applications.
• Used in the formulation of laboratory reagents and chemical standards.
• Potential precursor for photoactive materials in specialized industrial processes.

Basic Information

Product Name	5-Chloro-2-Hydroxy-3-[[2-Hydroxy-4-[[(4-Methylphenyl)Sulfonyl]Oxy]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	72379-58-9
Molecular Formula	C19H14ClN2NaO8S2
Molecular Weight	528.88 g/mol
Synonyms	Sodium 5-chloro-2-hydroxy-3-[(2-hydroxy-4-{[(4-methylphenyl)sulfonyl]oxy}phenyl)diazenyl]benzenesulfonate; Benzenesulfonic acid, 5-chloro-2-hydroxy-3-[[2-hydroxy-4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-, sodium salt; Azo dye intermediate 72379-58-9; CI 14720 (related class); p-Toluenesulfonate azo dye intermediate; Sodium salt of a sulfonated hydroxyazo compound.
EINECS	Contact for details

Quality Control

Our production of this specialty intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and reliability for your synthesis processes. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place 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.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents	Meets ICH guidelines

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