Description

Ethyl 3-Methylthieno[2,3-C]Isothiazole-5-Carboxylate is a high-purity, specialized heterocyclic building block of significant interest in advanced organic synthesis. This compound matters for its role as a key intermediate in the development of novel active pharmaceutical ingredients (APIs) and agrochemicals, enabling the construction of complex molecular architectures. It is primarily needed by research and development chemists, process development scientists, and manufacturers in the pharmaceutical, agrochemical, and fine chemical industries seeking to innovate and scale new products.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, anti-infectives, and other therapeutic areas.
• Agrochemical Synthesis: Serves as a key building block for developing new-generation pesticides, herbicides, and fungicides with enhanced efficacy and selectivity.
• Material Science Research: Used in the research and development of advanced organic electronic materials, such as organic semiconductors and light-emitting materials.
• Dye and Pigment Intermediate: Employed in the synthesis of specialized heterocyclic dyes and functional pigments.
• Academic & Contract Research: A valuable reagent for methodological studies and the discovery of new chemical reactions in university and CRO (Contract Research Organization) laboratories.
• Custom Synthesis & Scale-Up: Supplied for custom synthesis projects and process optimization from gram to kilogram scale for commercial production.

Basic Information

Product Name	Ethyl 3-Methylthieno[2,3-C]Isothiazole-5-Carboxylate
CAS No.	82000-57-5
Molecular Formula	C9H9NO2S2
Molecular Weight	227.30 g/mol
Synonyms	Ethyl 3-Methylthieno[2,3-c]isothiazole-5-carboxylate; 5-Carbethoxy-3-methylthieno[2,3-c]isothiazole; Thieno[2,3-c]isothiazole-5-carboxylic acid, 3-methyl-, ethyl ester; 3-Methylthieno[2,3-c]isothiazole-5-carboxylic acid ethyl ester; Ethyl 3-methylthienoisothiazole-5-carboxylate; 82000-57-5; AI3-52310
EINECS	Contact for details

Quality Control

Our Ethyl 3-Methylthieno[2,3-C]Isothiazole-5-Carboxylate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC, GC, NMR, and mass spectrometry, to confirm identity and purity. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We support 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 place at a controlled room temperature (15-25°C). Keep away from strong acids and incompatible organic solvents. The container should be kept tightly sealed to protect from moisture and contamination.

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%
Water Content (KF)	≤ 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.