Description

5-[[4-[[4-[[4-[[8-Acetylamino-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo]-3-ethoxy-7-sodiosulfo-1-naphthalenyl]azo]phenyl]aminocarbonyl]phenyl]azo]-2-hydroxybenzoic acid sodium salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure, featuring multiple sulfonate groups, provides excellent solubility and strong chromophoric properties, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, wash-fast colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon, valued for their brightness and colorfastness.
• Specialty Ink Production: Used in formulating inks for jet printing, packaging, and security applications requiring specific spectral properties.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, pH indicators, and other analytical chemistry applications.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and studying azo dye chemistry.

Basic Information

Product Name	5-[[4-[[4-[[4-[[8-Acetylamino-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo]-3-ethoxy-7-sodiosulfo-1-naphthalenyl]azo]phenyl]aminocarbonyl]phenyl]azo]-2-hydroxybenzoic acid sodium salt
CAS No.	6859-12-7
Molecular Formula	C51H34N8Na4O18S4
Molecular Weight	~1252.1 g/mol
Synonyms	Acid Red 337; C.I. 17210; 5-[(4-[[4-[(4-[(8-Acetamido-1-hydroxy-3,6-disulfo-2-naphthyl)azo]-3-ethoxy-7-sulfo-1-naphthyl)azo]phenyl]carbamoyl]phenyl)azo]-2-hydroxybenzoic acid tetrasodium salt; Benzoic acid, 5-[[4-[[4-[[4-[[8-(acetylamino)-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-3-ethoxy-7-sulfo-1-naphthalenyl]azo]phenyl]aminocarbonyl]phenyl]azo]-2-hydroxy-, sodium salt (1:4); Tetrasodium 5-[(4-{[4-({4-[(8-acetamido-1-hydroxy-3,6-disulfonato-2-naphthyl)azo]-3-ethoxy-7-sulfonato-1-naphthyl}azo)phenyl]carbamoyl}phenyl)azo]-2-hydroxybenzoate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, heavy metal content, and related substances is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect stability and handling properties.

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	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (in Water)	Freely soluble

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