Description

3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonic Acid is a high-purity, complex azo dye intermediate characterized by its multiple sulphonic acid groups, which confer excellent water solubility and substantivity. This compound is engineered for applications demanding precise color formation and strong molecular affinity to substrates. It is a critical component for manufacturers in the textile, ink, and specialty chemical industries who require reliable, high-performance intermediates for producing vibrant and stable dyes and pigments.

Application

• Primary Intermediate for Reactive and Acid Dyes: A key building block in the synthesis of high-grade dyes for wool, silk, nylon, and leather.
• Textile Colorant Production: Used in manufacturing dyes that offer excellent wash and light fastness for the textile industry.
• Inkjet and Printing Ink Formulations: Serves as a precursor for colorants in high-quality inks, providing sharp color definition.
• Specialty Pigment Synthesis: Employed in the creation of complex organic pigments for plastics and coatings.
• Research & Development: Utilized in chemical R&D for developing new chromophores and functional dyes.
• Biological Staining Reagents: Potential use as an intermediate for histological stains and diagnostic dyes.

Basic Information

Item	Detail
Product Name	3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonic Acid
CAS No.	93882-09-8
Molecular Formula	C37H30N4O10S4
Molecular Weight	818.91 g/mol
Synonyms	Acid Red 337; C.I. 17215; 3-[[5-[(Ethylphenylamino)sulfonyl]-2-phenoxyphenyl]azo]-4-hydroxy-5-[[(4-methylphenyl)sulfonyl]amino]-2,7-naphthalenedisulfonic acid; 5-[[(4-Methylphenyl)sulfonyl]amino]-3-[[5-[(N-ethylanilino)sulfonyl]-2-phenoxyphenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonic acid; Naphthalene-2,7-disulphonic acid, 3-[[5-[(ethylphenylamino)sulphonyl]-2-phenoxyphenyl]azo]-4-hydroxy-5-[[(p-tolyl)sulphonyl]amino]-; Azo dye intermediate 93882-09-8; 5-[(4-Methylphenyl)sulfonylamino]-3-[[5-[(N-ethylphenylamino)sulfonyl]-2-phenoxyphenyl]azo]-4-hydroxynaphthalene-2,7-disulfonic acid
EINECS	Contact for details

Quality Control

Our production of 3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided to guarantee traceability and product integrity for your manufacturing processes.

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 after opening to prevent moisture absorption and degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
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.