Description

4-[[[4-[[4-[Ethyl(Phenylmethyl)Amino]Phenyl]Azo]Phenyl]Sulfonyl]Amino]Benzenesulfonic Acid Sodium Salt is a high-purity, water-soluble anionic azo dye intermediate of significant commercial importance. Its molecular structure, featuring a sulfonic acid sodium salt group, provides excellent solubility and stability for downstream synthesis. This compound is primarily sought after by manufacturers in the dyes and pigments, textile chemicals, and specialty polymer industries for producing vibrant and durable colorants.

Application

• Key intermediate for the synthesis of acid dyes and direct dyes used in textile coloring.
• Precursor in the manufacturing of pigments and colorants for inks, paints, and coatings.
• Functional monomer or additive in the production of specialty polymers requiring chromophoric properties.
• Research and development chemical for novel optical materials and sensors.
• Used in the formulation of paper dyes and other industrial coloring applications.
• Potential intermediate for biological stains and diagnostic reagents in life sciences.

Basic Information

Product Name	4-[[[4-[[4-[Ethyl(Phenylmethyl)Amino]Phenyl]Azo]Phenyl]Sulfonyl]Amino]Benzenesulfonic Acid Sodium Salt
CAS No.	71550-23-7
Molecular Formula	C27H25N4O5S2Na
Molecular Weight	588.63 g/mol
Synonyms	Benzenesulfonic acid, 4-[[[4-[[4-[ethyl(phenylmethyl)amino]phenyl]azo]phenyl]sulfonyl]amino]-, sodium salt; Sodium 4-((4-((4-(N-benzyl-N-ethylamino)phenyl)diazenyl)phenyl)sulfonamido)benzenesulfonate; Azo dye intermediate 71550-23-7; C.I. Acid Orange 156 precursor; N-Ethyl-N-benzyl-4-[(4-{[(4-sulfophenyl)amino]sulfonyl}phenyl)diazenyl]benzenaminium inner salt sodium derivative
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis, and FTIR. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

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

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