Description

3-[[4-[Ethyl(Phenylmethyl)Amino]Phenyl]Azo]-4-[(4-Methylphenyl)Sulfonyl]Benzenesulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role in synthesizing specialized dyes with excellent lightfastness and wash-fastness properties for demanding applications. Industrial manufacturers in the textile, ink, and specialty polymer sectors rely on this consistent-quality intermediate to develop advanced coloring solutions.

Application

• Primary intermediate for the synthesis of high-performance azo dyes and pigments.
• Key component in manufacturing colorants for textile dyeing and printing, particularly for polyamide and protein fibers.
• Used in the production of specialized inks, including inks for packaging and security printing.
• Employed as a functional monomer or colorant in the development of colored polymers and specialty coatings.
• Potential use as a biological stain or histological dye precursor in laboratory settings.
• Research and development of novel optical materials and sensors leveraging its chromophoric properties.

Basic Information

Product Name	3-[[4-[Ethyl(Phenylmethyl)Amino]Phenyl]Azo]-4-[(4-Methylphenyl)Sulfonyl]Benzenesulfonic Acid Sodium Salt
CAS No.	71598-20-4
Molecular Formula	C28H26N3O5S2Na
Molecular Weight	571.64 g/mol
Synonyms	Sodium 3-[[4-[ethyl(phenylmethyl)amino]phenyl]azo]-4-[(4-methylphenyl)sulfonyl]benzenesulfonate; Benzenesulfonic acid, 3-[[4-[ethyl(phenylmethyl)amino]phenyl]azo]-4-[(4-methylphenyl)sulfonyl]-, sodium salt; C.I. Acid Orange 156; Acid Orange 156; 3-[(4-{Ethyl[(phenyl)methyl]amino}phenyl)diazenyl]-4-[(4-methylphenyl)sulfonyl]benzenesulfonic acid sodium salt; Azo dye intermediate 71598-20-4; Sodium (E)-3-((4-(ethyl(benzyl)amino)phenyl)diazenyl)-4-((4-methylphenyl)sulfonyl)benzenesulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Every lot is tested against comprehensive specifications, including identity confirmation, assay, and impurity profile analysis. A Certificate of Analysis (COA) detailing all test results is provided with each shipment 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%
Solubility (1% in Water)	Clear, orange solution

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