Description

4-[(2,3-Dichlorophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid is a specialized azo dye intermediate characterized by its distinct molecular structure, which is critical for imparting specific color properties and chemical reactivity. This compound is valued for its role as a key precursor in the synthesis of high-performance pigments and dyes, offering excellent lightfastness and thermal stability. It is primarily required by manufacturers in the pigments, dyes, plastics, and specialty chemical industries for producing colorants used in inks, coatings, and polymer masterbatches.

Application

• Pigment Manufacturing: Serves as a crucial intermediate for the synthesis of high-performance organic pigments, particularly azo-based reds and oranges.
• Dye Production: Used in the manufacture of specialized dyes for industrial applications requiring colorfastness.
• Plastics and Polymers: Incorporated as a colorant precursor in the production of masterbatches for coloring plastics, fibers, and synthetic resins.
• Inks and Coatings: A key component in formulating solvent-based and specialty inks, as well as industrial coatings that demand durability.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Textile Auxiliaries: Potential use in the synthesis of dyes for technical textiles where specific color properties are required.

Basic Information

Product Name	4-[(2,3-Dichlorophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid
CAS No.	72121-71-2
Molecular Formula	C17H10Cl2N2O3
Molecular Weight	361.18 g/mol
Synonyms	3-Hydroxy-4-[(2,3-dichlorophenyl)azo]-2-naphthoic acid; 2-Naphthalenecarboxylic acid, 4-[(2,3-dichlorophenyl)azo]-3-hydroxy-; C.I. Pigment Red 243; Pigment Red 243; PR 243; 4-(2,3-Dichlorophenylazo)-3-hydroxy-2-naphthoic acid; 4-[(2,3-Dichlorophenyl)diazenyl]-3-hydroxynaphthalene-2-carboxylic acid
EINECS	Contact for details

Quality Control

Our 4-[(2,3-Dichlorophenyl)Azo]-3-Hydroxy-2-Naphthoic Acid is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chemical composition, and batch-to-batch reliability. Standard quality parameters include assay, identification, and impurity profile analysis. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance protocols.

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 incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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