Description

2-[[[3-[[8-[[(2-Ethoxyethoxy)Carbonyl]Amino]-2-Hydroxy-1-Naphthalenyl]Azo]-4-Hydroxyphenyl]Sulfonyl]Amino]Benzenesulfonic Acid is a specialized azo dye intermediate characterized by its complex sulfonated aromatic structure. This compound matters for its role as a key precursor in synthesizing high-performance, water-soluble dyes and pigments, offering excellent color fastness and compatibility. Industries involved in the production of textiles, inks, and specialty colorants require this high-purity intermediate to achieve specific hue and performance characteristics in their final products.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloring, particularly for nylon, wool, and silk.
• Key building block in the manufacture of reactive dyes for cellulose fibers like cotton, providing enhanced wash-fastness.
• Precursor for specialty pigments and colorants used in inks, including for packaging and security printing applications.
• Used in research and development for creating novel functional dyes with potential applications in sensors or optical materials.
• Intermediate for dyes used in the coloration of leather and other protein-based materials.
• Potential use in the formulation of biological stains for microscopy, given its chromophoric properties.

Basic Information

Item	Detail
Product Name	2-[[[3-[[8-[[(2-Ethoxyethoxy)Carbonyl]Amino]-2-Hydroxy-1-Naphthalenyl]Azo]-4-Hydroxyphenyl]Sulfonyl]Amino]Benzenesulfonic Acid
CAS No.	71873-52-4
Molecular Formula	C27H26N4O10S2
Molecular Weight	630.65 g/mol
Synonyms	Benzenesulfonic acid, 2-[[[3-[[8-[[(2-ethoxyethoxy)carbonyl]amino]-2-hydroxy-1-naphthalenyl]azo]-4-hydroxyphenyl]sulfonyl]amino]-; 2-[[[3-[[8-[[(2-Ethoxyethoxy)carbonyl]amino]-2-hydroxy-1-naphthyl]azo]-4-hydroxyphenyl]sulfonyl]amino]benzenesulfonic acid; Azo dye intermediate 71873-52-4; CI 18055 intermediate (related); Acid Dye Intermediate; Sulfonated azo dye precursor.
EINECS	Contact for details

Quality Control

Our 2-[[[3-[[8-[[(2-Ethoxyethoxy)Carbonyl]Amino]-2-Hydroxy-1-Naphthalenyl]Azo]-4-Hydroxyphenyl]Sulfonyl]Amino]Benzenesulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance as a dye intermediate. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Brown to dark 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
Related Substances (HPLC)	Total impurities ≤ 3.0%

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