Description

6-[[4-[[4-[(1,2-Dihydro-4-Hydroxy-2-Oxoquinolin-3-Yl)Azo]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]Naphthalene-1,3-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate with a complex polyazo structure. This compound is valued for its ability to impart strong, vibrant color properties and excellent lightfastness in demanding applications. It is primarily utilized by manufacturers in the dye and pigment industries for producing specialized colorants and functional dyes.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a critical building block in the synthesis of high-performance, multi-azo direct and reactive dyes.
• Textile Dyeing: Used in the production of dyes for coloring cotton, wool, silk, and nylon, offering good wash and light fastness.
• Functional Dyes: A key precursor for dyes used in ink-jet printing, leather coloring, and paper coloration.
• Research & Development: Employed in academic and industrial R&D for developing novel chromophores and studying azo dye chemistry.
• Specialty Pigments: Can be used in the formulation of specialized pigments for coatings and plastics where specific color indices are required.

Basic Information

Product Name	6-[[4-[[4-[(1,2-Dihydro-4-Hydroxy-2-Oxoquinolin-3-Yl)Azo]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]Naphthalene-1,3-Disulfonic Acid Disodium Salt
CAS No.	6428-21-3
Molecular Formula	C39H26N6Na2O9S2
Molecular Weight	840.76 g/mol
Synonyms	Acid Red 337; C.I. 17210; 1,3-Naphthalenedisulfonic acid, 6-[[4-[[4-[(1,2-dihydro-4-hydroxy-2-oxo-3-quinolinyl)azo]-2-methylphenyl]azo]-2-methylphenyl]azo]-, disodium salt; Disodium 6-[[4-[[4-[(1,2-dihydro-4-hydroxy-2-oxo-3-quinolinyl)azo]-o-tolyl]azo]-o-tolyl]azo]naphthalene-1,3-disulfonate; Polyazo dye intermediate; Trisazo dye intermediate; Azo dye CAS 6428-21-3
EINECS	229-210-2

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high chemical purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance processes.

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, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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