Description

3-Hydroxy-4-[[2-Methyl-5-[(1-Methylethoxy)Carbonyl]Phenyl]Azo]-2-Naphthoic Acid is a specialized azo dye intermediate of significant commercial importance. Its value lies in its precise molecular structure, which serves as a critical building block for synthesizing high-performance pigments and colorants. This compound is essential for manufacturers in the dyes and pigments industry, particularly for producing colors with specific lightfastness and thermal stability properties for plastics, inks, and coatings.

Application

• Primary Intermediate for Azo Pigments: Serves as a key precursor in the synthesis of high-performance organic pigments, especially yellows, oranges, and reds.
• Plastics and Polymer Coloring: Used to manufacture pigments for coloring engineering plastics, PVC, polyolefins, and synthetic fibers, offering good dispersion and heat resistance.
• Printing Inks: Essential for producing pigments used in various printing inks, including packaging and publication inks, providing vibrant color strength.
• Industrial Coatings and Paints: Applied in the formulation of pigments for automotive, industrial, and decorative coatings that require durability and weatherability.
• Specialty Dyes: Potential use in the synthesis of specialized dyes for niche applications requiring specific chemical resistance or optical properties.

Basic Information

Product Name	3-Hydroxy-4-[[2-Methyl-5-[(1-Methylethoxy)Carbonyl]Phenyl]Azo]-2-Naphthoic Acid
CAS No.	83487-95-0
Molecular Formula	C22H20N2O5
Molecular Weight	392.41 g/mol
Synonyms	3-Hydroxy-4-[(2-methyl-5-isopropoxycarbonylphenyl)azo]-2-naphthoic Acid; CI Pigment Yellow 191; Pigment Yellow 191; PY 191; 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(2-methyl-5-[(1-methylethoxy)carbonyl]phenyl)azo]-; Isopropyl 4-[(3-hydroxy-2-naphthoyl)azo]-3-methylbenzoate (tautomeric form); Azo dye intermediate for PY191.
EINECS	Contact for details

Quality Control

Our production of 3-Hydroxy-4-[[2-Methyl-5-[(1-Methylethoxy)Carbonyl]Phenyl]Azo]-2-Naphthoic Acid adheres to stringent quality management systems to ensure batch-to-batch consistency and purity for demanding industrial applications. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and specific parameters are provided with every 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 heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 1.5%

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