Description

4-Hydroxy-3-[[4-Methoxy-3-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing reactive and acid dyes, offering excellent color properties and binding affinity to substrates. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-performance reactive dyes used for coloring cotton, viscose, and other cellulose fibers.
• Acid Dye Production: Used in the manufacture of acid dyes for wool, silk, and nylon, providing strong, wash-fast colors.
• Leather Dyeing: Serves as an intermediate for dyes applied in the leather tanning and finishing industry.
• Paper Coloring: Employed in the production of dyes for specialty paper and packaging materials.
• Ink Formulation: Used as a colorant intermediate in the formulation of certain industrial inks.
• Research & Development: A valuable compound for R&D laboratories focusing on novel dye chemistry and material science.

Basic Information

Product Name	4-Hydroxy-3-[[4-Methoxy-3-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	72749-64-5
Molecular Formula	C19H17N2O14S4
Molecular Weight	657.60 g/mol
Synonyms	Reactive Red 198 Intermediate; Acid Red 337 Intermediate; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((4-methoxy-3-((2-sulfooxy)ethyl)sulfonyl)phenyl)azo)-; C.I. 18221; 4-Hydroxy-3-((4-methoxy-3-((2-sulfooxyethyl)sulfonyl)phenyl)azo)-2,7-naphthalenedisulfonic acid; 72749-64-5; Azo dye intermediate CAS 72749-64-5
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[4-Methoxy-3-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for industrial synthesis. Each lot undergoes rigorous analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) documenting identity, purity, and related substances are available upon request to support your quality assurance and regulatory compliance needs.

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 sealed 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%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (1% in Water)	Complete, clear solution

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