Description

3-[[2,4-Dimethyl-5-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid 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 reactive and acid dyes, offering excellent color strength and chromophore properties. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce vivid 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 good wash and light fastness.
• Leather Dyeing: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Suitable for the production of dyes used in specialty paper and paperboard applications.
• Ink Formulations: A component in the synthesis of pigments for inks, including textile printing inks.
• Research & Development: Serves as a standard or starting material in chemical R&D for developing new chromophores and dye systems.

Basic Information

Product Name	3-[[2,4-Dimethyl-5-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid
CAS No.	67828-18-6
Molecular Formula	C20H19N2O9S2
Molecular Weight	495.50 g/mol
Synonyms	Acid Red 337; C.I. 17200; 4-Hydroxy-3-[[2-methyl-4-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-1-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 3-[(2,4-dimethyl-5-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-4-hydroxy-; Reactive Red Dye Intermediate; Azo dye intermediate 67828-18-6
EINECS	Contact for details

Quality Control

Our production of 3-[[2,4-Dimethyl-5-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. 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 room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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