Description

4-Chloro-3-[[4-[(4-Methoxyphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt is a high-purity, water-soluble diazo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing a range of vibrant and stable azo dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants with specific fastness properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the production of dyes for textile fibers, offering good wash and light fastness in the final colored product.
• Ink Manufacturing: Employed in the formulation of inks for various printing applications, including packaging and publications.
• Pigment Production: Acts as a precursor for lake pigments and other insoluble colorants used in plastics and coatings.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Specialty Coatings: Finds application in creating colored coatings where specific chemical resistance is required.

Basic Information

Product Name	4-Chloro-3-[[4-[(4-Methoxyphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	68959-30-8
Molecular Formula	C19H14ClN4NaO4S
Molecular Weight	452.84 g/mol
Synonyms	Sodium 4-chloro-3-{[4-[(4-methoxyphenyl)diazenyl]phenyl]diazenyl}benzenesulfonate; 4-Chloro-3-((4-((4-methoxyphenyl)azo)phenyl)azo)benzenesulfonic Acid Sodium Salt; C.I. Acid Orange 156; Benzenesulfonic acid, 4-chloro-3-[[4-[(4-methoxyphenyl)azo]phenyl]azo]-, sodium salt; Azo dye intermediate OA-156; Sodium 4-chloro-3,4'-bis[(4-methoxyphenyl)azo]benzenesulfonate (related structure)
EINECS	Contact for details

Quality Control

Our 4-Chloro-3-[[4-[(4-Methoxyphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial synthesis. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

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 product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed when not in use to minimize exposure to atmospheric moisture and light, which can affect product stability.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Freely soluble

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