Description

3-Hydroxy-4-[(4-Methyl-2-Sulphophenyl)Azo]-2-Naphthoic Acid CAS NO 16014-23-6 is a high-purity azo dye intermediate, specifically a naphthoic acid derivative. This compound is valued for its role as a critical precursor in the synthesis of high-performance pigments and dyes, offering excellent color properties and structural stability. It is primarily required by manufacturers in the pigment, textile dyeing, and specialty chemical industries for producing vivid and durable colorants.

Application

• Primary Intermediate for Azo Pigments: Serves as a key building block in the manufacture of high-performance red, orange, and brown azo pigments.
• Textile Dye Synthesis: Used in the production of dyes for coloring natural and synthetic fibers, providing good wash and light fastness.
• Industrial Coatings and Inks: Incorporated into pigment preparations for automotive paints, industrial coatings, and printing inks.
• Plastics and Masterbatch Coloring: Employed in the coloration of plastics, including polyolefins and engineering plastics, for consistent hue.
• Research and Development: Utilized in chemical R&D for developing new chromophores and studying azo coupling reactions.
• Specialty Chemical Manufacturing: Acts as a functional intermediate in the synthesis of more complex chemical entities for niche applications.

Basic Information

Product Name	3-Hydroxy-4-[(4-Methyl-2-Sulphophenyl)Azo]-2-Naphthoic Acid
CAS No.	16014-23-6
Molecular Formula	C18H14N2O6S
Molecular Weight	386.38 g/mol
Synonyms	4-[(4-Methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid; 3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthoic acid; C.I. Pigment Red 57:1 Intermediate; Naphthol AS-BS Coupling Component; 2-Naphthoic acid, 3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-; Azo dye intermediate 16014-23-6; 4-(4-Methyl-2-sulfophenylazo)-3-hydroxy-2-naphthoic acid
EINECS	240-149-5

Quality Control

Our production of 3-Hydroxy-4-[(4-Methyl-2-Sulphophenyl)Azo]-2-Naphthoic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive pigment synthesis. Certificates of Analysis (COA) documenting purity, impurity profile, and physical characteristics are provided to guarantee traceability and compliance with your internal quality standards.

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. The compound may be light-sensitive; prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
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.