Description

4-Oxo-1,4-Dihydroquinoline-3-Carboxylic Acid CAS NO 13721-01-2 is a high-purity, versatile quinoline derivative that serves as a critical building block in advanced organic synthesis. This compound is valued for its role as a key intermediate in the development of active pharmaceutical ingredients (APIs), particularly in the synthesis of quinolone antibiotics and other biologically active molecules. It is essential for research and production facilities in the pharmaceutical, agrochemical, and fine chemical industries seeking reliable, high-quality intermediates for complex synthesis pathways.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of quinolone and fluoroquinolone antibiotic APIs, such as norfloxacin and ciprofloxacin.
• Agrochemical Synthesis: Used in the research and development of novel pesticides and herbicides that leverage the quinoline scaffold.
• Fine Chemical Manufacturing: Serves as a versatile building block for creating complex organic molecules in custom synthesis and contract manufacturing.
• Research & Development: Employed in academic and industrial R&D labs for exploring new chemical entities and reaction methodologies.
• Material Science: Investigated as a potential monomer or additive for creating functional polymers and advanced materials.

Basic Information

Product Name	4-Oxo-1,4-Dihydroquinoline-3-Carboxylic Acid
CAS No.	13721-01-2
Molecular Formula	C10H7NO3
Molecular Weight	189.17 g/mol
Synonyms	Quinoline-3-carboxylic acid, 1,4-dihydro-4-oxo-; 1,4-Dihydro-4-oxoquinoline-3-carboxylic acid; 4-Oxoquinoline-3-carboxylic acid; 4-Hydroxyquinoline-3-carboxylic acid; 3-Carboxy-4-hydroxyquinoline; 4-Oxo-1H-quinoline-3-carboxylic acid; 4-Oxo-1,4-dihydroquinoline-3-carboxylic acid; 4-Oxoquinaldinic acid
EINECS	237-304-3

Quality Control

Our 4-Oxo-1,4-Dihydroquinoline-3-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for pharmaceutical intermediate applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents, strong bases, and strong acids. The container should be kept tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%

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