Description

4-[(5-Chloro-1,2-Dihydro-3-Hydroxy-2-Oxopyridin-4-Yl)Azo]Benzenesulfonic Acid is a specialized azo dye intermediate known for its distinct chromophoric properties. This compound is critical for synthesizing high-performance pigments and colorants with excellent light and chemical stability. It is primarily required by manufacturers in the dyestuff, textile, and specialty chemical industries for developing vibrant and durable colors.

Application

• Key intermediate for the synthesis of high-performance azo pigments and dyes.
• Used in the production of colorants for textile fibers and fabrics.
• Employed in the manufacturing of specialty inks, including those for packaging and printing.
• Acts as a precursor for functional dyes used in optical and electronic applications.
• Potential use in the development of biological stains and indicators for laboratory analysis.
• Research and development of novel colorimetric sensors.

Basic Information

Item	Detail
Product Name	4-[(5-Chloro-1,2-Dihydro-3-Hydroxy-2-Oxopyridin-4-Yl)Azo]Benzenesulfonic Acid
CAS No.	65837-79-8
Molecular Formula	C11H8ClN3O5S
Molecular Weight	329.71 g/mol
Synonyms	5-Chloro-4-[(4-sulfophenyl)azo]-1,2-dihydro-3-hydroxy-2-oxopyridine; 5-Chloro-4-[(4-sulfophenyl)azo]-3-hydroxypyridin-2(1H)-one; Benzenesulfonic acid, 4-[(5-chloro-1,2-dihydro-3-hydroxy-2-oxo-4-pyridinyl)azo]-; Azo dye intermediate 65837-79-8; 4-(5-Chloro-3-hydroxy-2-oxo-1,2-dihydropyridin-4-ylazo)benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. We implement strict in-process controls and final batch analysis to guarantee the identity, purity, and consistency of this azo intermediate. Certificates of Analysis (COA) are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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