Description

7-[[4-[[4-[[4-(Benzoylamino)Benzoyl]Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic Acid CAS NO 73287-69-1 is a high-purity, synthetic organic compound belonging to the class of azo dyes and intermediates. This chemical is valued for its strong chromophoric properties and ability to form stable, intense colors, making it a critical component in advanced colorant systems. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-grade, complex azo dyes for textiles and leather.
• Specialty Ink Formulations: Used in the production of inks for jet printing, packaging, and security applications requiring precise color fidelity.
• Functional Polymer Additive: Imparts specific optical or color properties to engineering plastics and specialty coatings.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and studying dye chemistry.
• Analytical Reagent: Can be utilized as a staining agent or colorimetric indicator in specific laboratory analyses.

Basic Information

Product Name	7-[[4-[[4-[[4-(Benzoylamino)Benzoyl]Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic Acid
CAS No.	73287-69-1
Molecular Formula	C35H26N6O7S2
Molecular Weight	706.74 g/mol
Synonyms	Acid Red 337; C.I. 17200; 1,3-Naphthalenedisulfonic acid, 7-[[4-[[4-[[4-(benzoylamino)benzoyl]amino]-2-methylphenyl]azo]-2-methylphenyl]azo]-; Benzenesulfonic acid, 4-[[4-[[4-(benzoylamino)benzoyl]amino]-2-methylphenyl]azo]-2-methyl-, coupled with 7-amino-1,3-naphthalenedisulfonic acid; Azo dye intermediate 73287-69-1
EINECS	Contact for details

Quality Control

Our production of 7-[[4-[[4-[[4-(Benzoylamino)Benzoyl]Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity, spectrophotometry for color strength, and elemental analysis, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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). This compound is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); therefore, containers must be kept sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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