Description

6-Amino-5-[[[2,3-Dihydro-2-(4-Methylphenyl)-1,3-Dioxo-1H-Isoindol]-5-Yl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid is a specialized azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring both a naphthalene sulfonic acid group and an isoindole dione moiety, makes it a key precursor for synthesizing high-performance pigments and dyes. This compound is primarily sought after by manufacturers in the colorants, specialty chemicals, and advanced materials sectors for its ability to impart specific color and stability properties.

Application

• Primary Intermediate for High-Performance Pigments: Serves as a critical building block in the synthesis of complex organic pigments (e.g., isoindolinone-based pigments) known for excellent lightfastness, weather resistance, and thermal stability.
• Specialty Dye Manufacturing: Used in the production of specialized azo dyes for applications requiring specific color shades and enhanced chemical resistance.
• Functional Colorants for Polymers: Incorporated into the manufacturing of colorants for engineering plastics, automotive coatings, and other high-durability polymer applications.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores, sensors, or advanced organic materials with specific optical properties.
• Ink Formulations: Potential use in the synthesis of colorants for high-quality inks, including those for packaging and security printing.

Basic Information

Product Name	6-Amino-5-[[[2,3-Dihydro-2-(4-Methylphenyl)-1,3-Dioxo-1H-Isoindol]-5-Yl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid
CAS No.	73287-59-9
Molecular Formula	C25H19N5O6S
Molecular Weight	517.52 g/mol
Synonyms	6-Amino-5-[(2,3-dihydro-2-(4-methylphenyl)-1,3-dioxo-1H-isoindol-5-yl)azo]-4-hydroxy-2-naphthalenesulfonic acid; 5-[[5-Amino-4-hydroxy-3-sulfo-2-naphthalenyl]azo]-2,3-dihydro-2-(4-methylphenyl)-1H-isoindole-1,3(2H)-dione; C.I. Pigment Yellow 185 Intermediate; PY 185 Intermediate; Azo Isoindolinone Intermediate; 73287-59-9; 6-Amino-4-hydroxy-5-[(2-(p-tolyl)-1,3-dioxoisoindolin-5-yl)azo]naphthalene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Quality is verified through analytical techniques including HPLC, IR spectroscopy, and elemental analysis. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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 degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Typical 97-99%)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in alkaline aqueous solutions; slightly soluble in most organic solvents

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