Description

Methyl 8-Chloro-4H-Benzo[B]Thieno[2,3-D]Thiine-2-Carboxylate is a high-purity, heterocyclic organic compound serving as a critical advanced intermediate in modern synthetic chemistry. Its complex fused-ring structure makes it a valuable building block for the development of novel active pharmaceutical ingredients (APIs) and functional materials. This compound is primarily utilized by research institutions and industrial R&D departments focused on medicinal chemistry, agrochemical discovery, and material science.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and other therapeutic areas.
• Agrochemical Research: Used as a core scaffold for developing new-generation pesticides and herbicides with enhanced efficacy.
• Material Science: Serves as a building block for creating specialized organic electronic materials and photoresists.
• Academic & Contract Research: Essential for method development and exploratory synthesis in university and CRO laboratory settings.
• Chemical Library Synthesis: Employed in the construction of diverse compound libraries for high-throughput screening in drug discovery.

Basic Information

Product Name	Methyl 8-Chloro-4H-Benzo[B]Thieno[2,3-D]Thiine-2-Carboxylate
CAS No.	255378-11-1
Molecular Formula	C13H9ClO2S2
Molecular Weight	296.79 g/mol
Synonyms	8-Chloro-4H-thieno[2,3-d][1,3]thiazine-2-carboxylic acid methyl ester; Methyl 8-chloro-4H-thieno[2,3-d][1,3]thiazine-2-carboxylate; 255378-11-1; 8-Chloro-4H-thieno[2,3-d]thiazine-2-carboxylic acid methyl ester; Methyl 8-chloro-4H-benzo[4,5]thieno[2,3-d][1,3]thiazine-2-carboxylate
EINECS	Contact for details

Quality Control

Our production of Methyl 8-Chloro-4H-Benzo[B]Thieno[2,3-D]Thiine-2-Carboxylate adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC, NMR, and MS, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with each 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 a controlled room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Residual Solvents (GC)	Meets ICH Q3C guidelines
Loss on Drying	≤ 0.5%

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