Description

Disodium 1-[[4-[[(4-Methylphenyl)Sulphonyl]Oxy]Phenyl]Azo]-4-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalenesulphonate is a high-purity, synthetic organic dye belonging to the class of azo dyes with multiple sulphonate groups. This compound is valued for its strong colorant properties, excellent water solubility, and stability, making it a critical component for demanding industrial applications. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent, vibrant, and durable coloration.

Application

• Textile Dyeing: As a key dye for synthetic fibers like nylon and polyamide, providing excellent wash and light fastness.
• Ink Formulation: Used in the production of high-performance inks for digital, packaging, and security printing applications.
• Industrial Coatings: Imparts color to coatings and paints where chemical resistance and color stability are required.
• Paper Coloring: Employed in specialty paper products requiring specific, stable hues.
• Plastics and Polymers: Acts as a colorant for engineering plastics and synthetic materials.
• Biological Staining (Research Grade): Potential use as a histological stain in laboratory settings, subject to specific purity grades.
• Leather Dyeing: Provides durable coloration for finished leather goods.

Basic Information

Item	Details
Product Name	Disodium 1-[[4-[[(4-Methylphenyl)Sulphonyl]Oxy]Phenyl]Azo]-4-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalenesulphonate
CAS No.	82508-83-6
Molecular Formula	C40H26N6Na2O13S3
Molecular Weight	956.81 g/mol
Synonyms	Acid Red 337; C.I. 17200; Disodium 6-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-5-hydroxy-3-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2,7-naphthalenedisulfonate; 1-Naphthalenesulfonic acid, 6-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-5-hydroxy-3-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-, disodium salt; Azo dye C.I. 17200; C.I. Acid Red 337; Reactive Red 337 (related class); Textile Red 337
EINECS	Contact for details

Quality Control

Our production of Disodium 1-[[4-[[(4-Methylphenyl)Sulphonyl]Oxy]Phenyl]Azo]-4-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalenesulphonate adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation and spectrophotometry for color strength, to ensure it meets precise customer specifications and industry standards. 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content (KF)	≤ 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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