Description

3-Methylthieno[2,3-C]Isothiazole-5-Carboxylic Acid is a high-purity heterocyclic carboxylic acid building block of significant interest in advanced organic synthesis. This compound matters as a key intermediate for constructing complex molecular architectures, particularly in pharmaceutical research and development. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and material science industries for creating novel active ingredients and functional molecules.

Application

• Pharmaceutical Intermediate: Serves as a critical precursor in the synthesis of novel drug candidates, especially those targeting central nervous system (CNS) disorders or possessing antimicrobial activity.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its unique fused-ring isothiazole-thiophene structure.
• Material Science: Acts as a monomer or functionalizing agent for creating specialty polymers and organic electronic materials with tailored properties.
• Chemical Biology: Employed as a molecular probe or a scaffold for designing enzyme inhibitors and receptor modulators in biochemical research.
• Academic & Contract Research: A valuable reagent for methodological studies in heterocyclic and medicinal chemistry within university and CRO laboratories.

Basic Information

Product Name	3-Methylthieno[2,3-C]Isothiazole-5-Carboxylic Acid
CAS No.	82000-58-6
Molecular Formula	C7H5NO2S2
Molecular Weight	199.25 g/mol
Synonyms	3-Methylthieno[2,3-c]isothiazole-5-carboxylic acid; 5-Carboxy-3-methylthieno[2,3-c]isothiazole; 3-Methylthieno[2,3-c]-1,2-thiazole-5-carboxylic acid; Thieno[2,3-c]isothiazole-5-carboxylic acid, 3-methyl-; 82000-58-6; 3-Methyl-thieno[2,3-c]isothiazole-5-carboxylic acid
EINECS	Contact for details

Quality Control

Our 3-Methylthieno[2,3-C]Isothiazole-5-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via NMR and IR spectroscopy, to ensure it meets the high standards required for research and development applications. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

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 heat sources and incompatible materials. Due to its light-sensitive nature, containers should be amber-colored or stored in light-resistant secondary packaging.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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