Description

7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sodiosulfo-2-naphthalenyl]aminocarbonyl]phenyl]azo]naphthalene-2-sulfonic acid sodium salt is a high-purity, complex azo dye intermediate. This compound is critical for synthesizing specialized dyes and pigments with excellent color fastness and specific optical properties. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries for producing high-value colorants.

Application

• Primary Intermediate for Azo Dyes: Used in the synthesis of high-performance, water-soluble azo dyes for textile fibers like cotton, wool, and nylon.
• Specialty Ink Formulations: Serves as a key precursor for pigments in jet printing inks and security inks requiring specific lightfastness and solubility.
• Industrial Coatings: Employed in the production of colorants for industrial paints and coatings where chemical stability is paramount.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Functional Dyes: Potential intermediate for dyes used in biological staining, sensors, or other functional applications due to its reactive amino and sulfonic acid groups.

Basic Information

Product Name	7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sodiosulfo-2-naphthalenyl]aminocarbonyl]phenyl]azo]naphthalene-2-sulfonic acid sodium salt
CAS No.	5938-87-4
Molecular Formula	C41H28N7Na2O10S2
Molecular Weight	904.80 g/mol
Synonyms	Acid Red 337; C.I. 17215; Sodium 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sulfo-2-naphthoyl]amino]phenyl]azo]naphthalene-2-sulfonate; 7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sulfo-2-naphthyl]carbamoyl]phenyl]azo]naphthalene-2-sulfonic acid disodium salt; 2-Naphthalenesulfonic acid, 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sulfo-2-naphthalenyl]carbonyl]phenyl]azo]-, sodium salt (1:2)
EINECS	227-689-5

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through modern analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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 tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.