Description

4-Hydroxy-3-[[2-Methyl-5-[(Phenylamino)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a high-purity azo dye intermediate and specialty chemical. This compound is valued for its precise molecular structure, which is critical for synthesizing dyes and pigments with specific color properties and stability. It is primarily required by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced colorants for textiles, inks, and specialty coatings.

Application

• Primary intermediate for the synthesis of high-performance azo dyes and pigments.
• Key component in the production of colorants for textile dyeing and printing processes.
• Used in formulating specialized inks for industrial printing and packaging.
• Research and development of novel functional dyes with specific light-fastness and chemical resistance.
• Potential use as a colorimetric reagent or indicator in analytical chemistry applications.
• Manufacturing of colorants for leather and paper products.

Basic Information

Product Name	4-Hydroxy-3-[[2-Methyl-5-[(Phenylamino)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	85409-50-3
Molecular Formula	C23H19N3O6S2
Molecular Weight	497.54 g/mol
Synonyms	Acid Red 337; C.I. 17210; 4-Hydroxy-3-[(2-methyl-5-[(phenylamino)sulfonyl]phenyl)azo]-2-naphthalenesulfonic acid; 2-Naphthalenesulfonic acid, 4-hydroxy-3-((2-methyl-5-((phenylamino)sulfonyl)phenyl)azo)-; Benzenesulfonamide, N-phenyl-4-((4-hydroxy-3-sulfo-2-naphthalenyl)azo)-3-methyl-
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[2-Methyl-5-[(Phenylamino)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid adheres to strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Comprehensive Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided to guarantee compliance with your specific application requirements.

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 oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.