Description

4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-6-[(3-Sulphophenyl)Amino]Naphthalene-2-Sulphonic Acid is a high-purity, water-soluble anionic dye intermediate, specifically engineered for demanding synthesis applications. Its complex poly-sulfonated azo structure provides excellent solubility and reactivity, making it a critical precursor for creating vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries who require consistent quality and reliable supply for their production processes.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-performance reactive dyes for cotton, wool, and nylon fibers.
• Specialty Ink Production: Used in the manufacture of inks for jet printing, packaging, and security applications requiring specific color fastness.
• Functional Dye Synthesis: Precursor for dyes used in biological staining, liquid crystal displays (LCDs), and other advanced optical materials.
• Research & Development: Serves as a standard or starting material in chemical R&D for novel chromophores and functional molecules.
• Paper Coloring: Employed in the production of specialty colored papers where high purity is required.
• Leather Dyeing: Used in the formulation of dyes for leather finishing to achieve deep, uniform shades.

Basic Information

Product Name	4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-6-[(3-Sulphophenyl)Amino]Naphthalene-2-Sulphonic Acid
CAS No.	26901-59-7
Molecular Formula	C26H24N4O13S3
Molecular Weight	696.68 g/mol
Synonyms	Reactive Dye Intermediate 26901-59-7; C.I. Reactive Red 198 (related); 6-Amino-4-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]-2-methoxy-5-methylphenyl]azo]-5-[(3-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid; 4-Hydroxy-3-((2-methoxy-5-methyl-4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)-6-((3-sulfophenyl)amino)-2-naphthalenesulfonic acid; Azo dye intermediate 26901-59-7; Poly-sulfonated azo compound; Water-soluble anionic dye precursor
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-6-[(3-Sulphophenyl)Amino]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent composition and performance for your synthesis processes. Comprehensive Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment to support your quality assurance and regulatory needs.

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 each use to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 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.