Description

7-Ureido-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, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulfonic acid groups and azo linkages, makes it a critical precursor for synthesizing specialized dyes and pigments with enhanced color fastness and solubility properties. This compound is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors for demanding applications.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloring, particularly for nylon, silk, and wool.
• Key building block in the production of reactive dyes for cellulose fibers like cotton, offering excellent wash-fastness.
• Precursor for specialized pigments and colorants in the manufacturing of inks for packaging, printing, and writing instruments.
• Used in the formulation of functional dyes for applications in laser printing, optical data storage, and other high-tech industries.
• Research and development chemical for academic and industrial laboratories exploring new chromophores and dye chemistry.
• Potential use in the coloration of leather and paper products, where specific shade and stability requirements must be met.

Basic Information

Item	Detail
Product Name	7-Ureido-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.	5979-30-6
Molecular Formula	C35H24N6O10S2Na2
Molecular Weight	806.71 g/mol
Synonyms	Acid Red 337; C.I. 17215; 7-Ureido-4-hydroxy-3-({4-[(5-hydroxy-6-[(4-methylphenyl)diazenyl]-7-sulfo-2-naphthyl)carbamoyl]phenyl}diazenyl)naphthalene-2-sulfonic acid disodium salt; Sodium 7-ureido-4-hydroxy-3-[[4-[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sulfo-2-naphthyl]carbamoyl]phenyl]azo]naphthalene-2-sulfonate; Azo dye intermediate 5979-30-6; 2-Naphthalenesulfonic acid, 7-ureido-4-hydroxy-3-((4-((5-hydroxy-6-((4-methylphenyl)azo)-7-sulfo-2-naphthalenyl)carbamoyl)phenyl)azo)-, disodium salt
EINECS	Contact for details

Quality Control

Our production of 7-Ureido-4-Hydroxy-3-[[4-[[5-Hydroxy-6-[(4-Methylphenyl)Azo]-7-Sodiosulfo-2-Naphthalenyl]Aminocarbonyl]Phenyl]Azo]Naphthalene-2-Sulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing including HPLC for purity, spectrophotometry for color strength, and wet chemistry methods to confirm identity and composition. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical parameters to ensure batch-to-batch consistency and compliance with your specifications.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Solubility (in Water)	Freely soluble
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.