Description

4-[(4-Chloro-5-Methyl-2-Sulphophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid CAS NO 27757-95-5 is a specialized azo dye intermediate, also known as a naphthol coupling component, prized for its ability to form vivid and stable colorants. Its core value lies in providing a critical building block for synthesizing high-performance pigments and dyes with excellent lightfastness and chemical resistance. This compound is essential for manufacturers in the pigments, dyes, inks, and coatings industries seeking to produce durable, high-quality color products.

Application

• Primary Intermediate for Azo Pigments: A key coupling component in the synthesis of high-performance monoazo and disazo pigments, particularly for yellows, oranges, and reds.
• Industrial Coatings and Paints: Used to manufacture pigments that provide excellent weather resistance, heat stability, and color strength for automotive, industrial, and architectural coatings.
• Printing Inks: Serves as a precursor for pigments used in various printing inks, including packaging, publication, and specialty inks, ensuring good printability and color fidelity.
• Plastics and Masterbatch Coloring: Pigments derived from this intermediate are suitable for coloring a wide range of polymers, offering good dispersion and thermal stability during processing.
• Textile Dyes: Can be utilized in the production of certain azo dyes for synthetic fibers, though its primary use is in pigment applications.
• Specialty Colorants: Employed in the development of colorants for niche applications requiring specific spectral properties or enhanced durability.

Basic Information

Product Name	4-[(4-Chloro-5-Methyl-2-Sulphophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid
CAS No.	27757-95-5
Molecular Formula	C18H12ClN2O6S
Molecular Weight	419.82 g/mol
Synonyms	3-Hydroxy-4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-2-naphthoic acid; C.I. Azoic Coupling Component 38; Azoic Coupling Component 38; Naphthol AS-CL; 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-; 4-(4'-Chloro-5'-Methyl-2'-Sulfophenylazo)-3-Hydroxy-2-Naphthoic Acid; 27757-95-5; Azoic Coupling Component CL
EINECS	Contact for details

Quality Control

Our production of 4-[(4-Chloro-5-Methyl-2-Sulphophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with agreed specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics 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 quality and handling properties.

Specification

Item	Specification
Appearance	Orange to 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
Solubility	Soluble in alkaline aqueous solutions

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