Description

3-[[2,4-Dimethoxy-6-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonic Acid is a high-purity, sulfonated azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulfonic acid groups, provides excellent water solubility and strong substantivity, making it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant, wash-fast colors.

Application

• Textile Dye Intermediate: Primary use as a key building block for synthesizing reactive, acid, and direct dyes for cotton, wool, silk, and nylon.
• Inkjet Ink Formulation: Used in the production of high-performance colorants for industrial and commercial inkjet printing, ensuring color brilliance and stability.
• Paper Coloring: Serves as a precursor for dyes used in the coloring of specialty papers and security papers.
• Leather Dyeing: An intermediate in the manufacture of dyes for the leather tanning and finishing industry.
• Biological Staining: Potential use in the synthesis of histological stains for laboratory and diagnostic applications.
• Research & Development: Employed in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	3-[[2,4-Dimethoxy-6-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonic Acid
CAS No.	67674-29-7
Molecular Formula	C₂₀H₂₀N₂O₁₂S₂
Molecular Weight	544.51 g/mol
Synonyms	Acid Red 337; C.I. 17200; 4-Hydroxy-3-[[2-methoxy-5-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-1-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 4-hydroxy-3-((2-methoxy-5-((2-sulfooxyethyl)sulfonyl)phenyl)azo)-; Reactive Red 180 related intermediate; Azo dye intermediate 67674-29-7; Sulphonated azo naphthalene derivative
EINECS	Contact for details

Quality Control

Our production of 3-[[2,4-Dimethoxy-6-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonic Acid adheres to a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the high standards required for dye intermediate applications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment.

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 strong acids and organic solvents. The container must be kept tightly closed to protect from moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 2.0%
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.