Description

4-Oxo-9,10-Dihydro-4H-Benzo(4,5)-Cyclohepta-(1,2B)Thiophene is a high-purity, fused tricyclic organic compound featuring a thiophene and ketone moiety, serving as a critical advanced pharmaceutical intermediate. Its unique heterocyclic structure makes it a valuable building block for the synthesis of complex active pharmaceutical ingredients (APIs) and other fine chemicals. This product is essential for research and development laboratories and manufacturing facilities in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable, high-quality intermediates.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, inflammation, and other therapeutic areas.
• Agrochemical Synthesis: Used in the research and development of new pesticides and herbicides, leveraging its complex heterocyclic core.
• Material Science Research: Serves as a monomer or building block for developing organic semiconductors, conductive polymers, and other advanced organic materials.
• Organic Synthesis & Catalysis: Employed as a sophisticated starting material or ligand in complex organic transformations and catalytic cycles for academic and industrial research.
• Dye & Pigment Industry: Acts as an intermediate for synthesizing specialized dyes and pigments due to its fused aromatic structure.

Basic Information

Product Name	4-Oxo-9,10-Dihydro-4H-Benzo(4,5)-Cyclohepta-(1,2B)Thiophene
CAS No.	1622-55-5
Molecular Formula	C13H10OS
Molecular Weight	214.28 g/mol
Synonyms	9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one; 4H-Benzo[4,5]cyclohepta[1,2-b]thiophen-4-one, 9,10-dihydro-; 4-Keto-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene; 4-Oxo-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene; Benzo[4,5]cyclohepta[1,2-b]thiophen-4(9H)-one; 1622-55-5; Tricyclic thiophene ketone
EINECS	Contact for details

Quality Control

Our 4-Oxo-9,10-Dihydro-4H-Benzo(4,5)-Cyclohepta-(1,2B)Thiophene is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistency suitable for sensitive synthetic applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each 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 controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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