Description

Sodium 2-[[[2,5-Dichloro-4-[(2-Phenyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring indole and dichlorophenyl groups linked via an azo bond, provides excellent chromophoric properties and functional versatility. This compound is essential for manufacturers requiring precise and stable colorants for advanced applications in textiles, inks, and specialty polymers.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-performance, wash-fast azo dyes for synthetic and natural fibers.
• Ink Manufacturing: Used in the production of pigments for industrial inks, including those for packaging and security printing.
• Functional Polymer Synthesis: Acts as a monomer or additive to impart color and specific functional properties to advanced polymeric materials.
• Research & Development: Serves as a critical building block in organic synthesis and materials science research for novel chromophores.
• Specialty Coatings: Employed in formulating colored coatings where specific lightfastness and chemical resistance are required.
• Analytical Chemistry: Potential use as a staining agent or indicator in specific biochemical and histochemical assays.

Basic Information

Item	Detail
Product Name	Sodium 2-[[[2,5-Dichloro-4-[(2-Phenyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate
CAS No.	72968-75-3
Molecular Formula	C22H16Cl2N4NaO5S2
Molecular Weight	581.41 g/mol
Synonyms	2,5-Dichloro-4-[(2-phenyl-1H-indol-3-yl)azo]benzenesulfonamide, N-(2-sulfoethyl)-, sodium salt; Sodium 2-({[2,5-dichloro-4-[(2-phenyl-1H-indol-3-yl)diazenyl]phenyl]sulfonyl}amino)ethane-1-sulfonate; Azo Dye Intermediate 72968-75-3; Acid Blue Dye Intermediate; C.I. Acid Blue 277 Intermediate; Reactive Dye Precursor; 72968-75-3 (CAS Index Name)
EINECS	Contact for details

Quality Control

Our production of Sodium 2-[[[2,5-Dichloro-4-[(2-Phenyl-1H-Indol-3-Yl)Azo]Phenyl]Sulphonyl]Amino]Ethanesulphonate adheres to a strict quality management system to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. A detailed Certificate of Analysis (COA) documenting identity, purity, and related substances is provided with each shipment.

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). Keep away from heat sources and incompatible materials. For long-term storage, consider an inert atmosphere to maximize stability.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0% Any single impurity ≤ 1.0%
Solubility (1% in Water)	Clear solution

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