Description

6-Amino-5-[(4-Chloro-5-Methyl-2-Sulfophenyl)Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for producing vibrant and stable colorants, particularly for textiles and specialty inks. This compound is essential for manufacturers and R&D laboratories in the dye and pigment industry seeking to develop advanced color formulations.

Application

This specialized azo intermediate is engineered for high-performance colorant synthesis. Its primary and derived applications include:

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Pigment Manufacturing: Used in the production of organic pigments for plastics, coatings, and printing inks, offering excellent color strength.
• Specialty Ink Formulations: Serves as a key component in creating inks for digital textile printing and other high-resolution applications.
• Research & Development: A valuable compound for chemical research focused on novel chromophores and dye chemistry.
• Laboratory Reagent: Used as a standard or reagent in analytical and quality control laboratories within the colorant industry.

Basic Information

Product Name	6-Amino-5-[(4-Chloro-5-Methyl-2-Sulfophenyl)Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid
CAS No.	59223-29-9
Molecular Formula	C17H13ClN3O7S2
Molecular Weight	470.89 g/mol
Synonyms	6-Amino-4-hydroxy-5-[(4-chloro-5-methyl-2-sulfophenyl)azo]-2-naphthalenesulfonic acid; C.I. 27290; Acid Red 337 (related dye structure); 2-Naphthalenesulfonic acid, 6-amino-5-[(4-chloro-5-methyl-2-sulfophenyl)azo]-4-hydroxy-; Azo dye intermediate for red shades; 4-Hydroxy-6-amino-2-naphthalenesulfonic acid azo derivative; (4-Chloro-5-methyl-2-sulfophenyl)azo dye precursor
EINECS	Contact for details

Quality Control

Our production of this azo intermediate adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC to confirm identity and assay. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are provided and available upon request to support your quality assurance processes.

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 tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

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	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
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.