Description

3-[[4-[Ethyltolylamino]Phenyl]Azo]-4-[4-Tolylsulphonyl]Benzenesulphonic Acid CAS NO 68400-40-8 is a specialized azo dye intermediate characterized by its complex aromatic structure incorporating sulphonic acid and sulphonyl groups. This compound matters for its role as a key precursor in synthesizing high-performance, water-soluble dyes and pigments, offering excellent color fastness and thermal stability. Industrial manufacturers in the textile, ink, and specialty polymer sectors require this high-purity intermediate to develop vibrant and durable colorants.

Application

• Primary intermediate for the synthesis of acid dyes and reactive dyes used in textile coloring, particularly for nylon, wool, and silk.
• Key precursor in manufacturing pigments and colorants for inks, including printing inks and inkjet formulations.
• Used in the production of specialty dyes for leather and paper products.
• Functional component in the research and development of optical materials and sensors due to its chromophoric properties.
• Potential use as an intermediate for liquid crystal dyes and other advanced electronic materials.
• Employed in laboratory settings for analytical chemistry as a staining agent or a standard.

Basic Information

Product Name	3-[[4-[Ethyltolylamino]Phenyl]Azo]-4-[4-Tolylsulphonyl]Benzenesulphonic Acid
CAS No.	68400-40-8
Molecular Formula	C28H27N3O5S2
Molecular Weight	549.66 g/mol
Synonyms	Benzenesulfonic acid, 3-[[4-[(4-ethylphenyl)amino]phenyl]azo]-4-[(4-methylphenyl)sulfonyl]-; 4-[(4-Methylphenyl)sulfonyl]-3-[[4-[(4-ethylphenyl)amino]phenyl]azo]benzenesulfonic acid; Azo dye intermediate 68400-40-8; Acid Yellow 219 (related dye class); C.I. 48055; Disperse dye intermediate; 3-[(4-((4-Ethylphenyl)amino)phenyl)azo]-4-((4-methylphenyl)sulfonyl)benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our 3-[[4-[Ethyltolylamino]Phenyl]Azo]-4-[4-Tolylsulphonyl]Benzenesulphonic Acid is produced under a stringent quality management system. Every 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 and regulatory compliance 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 sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange-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 ≤ 5.0%

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