Description

Disodium 5-[[2-Methoxy-5-Methyl-4-[(4-Nitro-2-Sulphonatophenyl)Azo]Phenyl]Azo]Salicylate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing vibrant and stable colorants, particularly in the red to violet spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance dyes and pigments.

Application

• Primary Dye Intermediate: A critical building block for the synthesis of acid dyes and direct dyes used in textile coloring, especially for nylon, wool, and silk.
• Inkjet Ink Formulation: Used in the production of colorants for high-quality inks, contributing to color strength and stability in printing applications.
• Paper Coloring: Serves as a precursor for dyes applied in the manufacture of colored papers and paper products.
• Leather Dyeing: Employed in the synthesis of dyes for coloring leather goods, offering good penetration and fastness properties.
• Specialty Pigments: Acts as an intermediate in the creation of lake pigments and other specialty colorants for plastics and coatings.
• Biological Staining: Potential use as an intermediate for histological stains in laboratory and diagnostic applications.

Basic Information

Item	Detail
Product Name	Disodium 5-[[2-Methoxy-5-Methyl-4-[(4-Nitro-2-Sulphonatophenyl)Azo]Phenyl]Azo]Salicylate
CAS No.	68833-61-4
Molecular Formula	C21H15N5Na2O9S
Molecular Weight	559.42 g/mol
Synonyms	5-[[2-Methoxy-5-methyl-4-[(4-nitro-2-sulfophenyl)azo]phenyl]azo]salicylic acid, disodium salt; C.I. Acid Red 337; Disodium 5-[(2-methoxy-5-methyl-4-[(4-nitro-2-sulfonatophenyl)azo]phenyl)azo]salicylate; Acid Red 337; Salicylic acid, 5-[[2-methoxy-5-methyl-4-[(4-nitro-2-sulfophenyl)azo]phenyl]azo]-, disodium salt; Disodium 5-[(4-[(4-nitro-2-sulfonatophenyl)azo]-2-methoxy-5-methylphenyl)azo]salicylate; Azo dye intermediate 68833-61-4
EINECS	Contact for details

Quality Control

Our Disodium 5-[[2-Methoxy-5-Methyl-4-[(4-Nitro-2-Sulphonatophenyl)Azo]Phenyl]Azo]Salicylate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance as a dye intermediate. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request to support your quality assurance protocols.

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). Keep away from incompatible materials and sources of ignition. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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