Description

2-Chloro-7-Ethyl-4,7-Dihydro-4-Oxothieno[2,3-B]Pyridine-5-Carboxylic Acid is a high-purity, heterocyclic carboxylic acid derivative that serves as a critical advanced pharmaceutical intermediate (API) and a versatile building block in organic synthesis. Its unique fused thienopyridine structure makes it a valuable precursor for the development of novel active pharmaceutical ingredients (APIs) and fine chemicals. This compound is primarily utilized by research institutions and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for the synthesis of complex molecules with potential biological activity.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, anti-inflammatory agents, and other therapeutic areas.
• Agrochemical Research: Used in the development of new pesticides, herbicides, and fungicides due to its bioactive heterocyclic core.
• Organic Synthesis Reagent: Serves as a versatile precursor for constructing complex polycyclic frameworks in academic and industrial research laboratories.
• Material Science: Potential application in the synthesis of organic semiconductors, ligands for catalysis, or specialty polymers.
• Chemical Reference Standard: Supplied as a high-purity standard for analytical method development, quality control, and regulatory compliance in manufacturing.

Basic Information

Product Name	2-Chloro-7-Ethyl-4,7-Dihydro-4-Oxothieno[2,3-B]Pyridine-5-Carboxylic Acid
CAS No.	55503-43-0
Molecular Formula	C11H10ClNO3S
Molecular Weight	271.72 g/mol
Synonyms	2-Chloro-7-ethyl-4,7-dihydro-4-oxothieno[2,3-b]pyridine-5-carboxylic acid; Thieno[2,3-b]pyridine-5-carboxylic acid, 2-chloro-7-ethyl-4,7-dihydro-4-oxo-; 2-Chloro-7-ethyl-4,7-dihydro-4-oxothieno[2,3-b]pyridine-5-carboxylate; 55503-43-0; 2-Chloro-7-ethyl-4,7-dihydro-4-oxo-4H-thieno[2,3-b]pyridine-5-carboxylic acid
EINECS	Contact for details

Quality Control

Our 2-Chloro-7-Ethyl-4,7-Dihydro-4-Oxothieno[2,3-B]Pyridine-5-Carboxylic Acid is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical specifications. Our quality commitment supports compliance with cGMP and ICH guidelines for pharmaceutical intermediates.

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 strong acids and organic solvents. The container should be kept tightly sealed in a dry environment to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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