Description

Thieno[3,2-D]Isothiazole-5-Carboxylic Acid is a high-value, heterocyclic carboxylic acid derivative that serves as a critical building block in advanced organic synthesis. Its unique fused-ring structure makes it a versatile intermediate for constructing complex molecules with specific electronic and steric properties. This compound is primarily sought after by research institutions and pharmaceutical companies engaged in the development of novel active pharmaceutical ingredients (APIs), agrochemicals, and functional materials.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new drug candidates, particularly in areas requiring complex heterocyclic cores.
• Agrochemical Synthesis: Used in the creation of advanced pesticides and herbicides, where its structure can contribute to specific biological activity.
• Material Science Research: Serves as a precursor for organic electronic materials, such as semiconductors or light-emitting compounds.
• Chemical Biology Probes: Utilized in the design and synthesis of molecular probes for studying biological systems and enzyme mechanisms.
• Academic & Contract Research: Essential for methodological development and exploratory synthesis in university and CRO (Contract Research Organization) laboratories.
• Ligand and Catalyst Development: The carboxylic acid functionality allows for derivatization into chelating agents or catalyst frameworks for metal-mediated reactions.

Basic Information

Product Name	Thieno[3,2-D]Isothiazole-5-Carboxylic Acid
CAS No.	74598-12-2
Molecular Formula	C6H3NO2S2
Molecular Weight	185.22 g/mol
Synonyms	5-Thieno[3,2-d]isothiazolecarboxylic acid; Thieno[3,2-d]isothiazole-5-carboxylic acid; 74598-12-2; Thienoisothiazole-5-carboxylic acid; 5-Carboxythieno[3,2-d]isothiazole; 1-Thia-4-aza-s-indacene-8-carboxylic acid; 1λ⁴,4-Thiaazas-indacene-8-carboxylic acid
EINECS	Contact for details

Quality Control

Our Thieno[3,2-D]Isothiazole-5-Carboxylic Acid is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and NMR for structural confirmation, to ensure it meets the high standards required for research and development applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This compound may be light-sensitive and should be handled accordingly.

Specification

Item	Specification
Appearance	White to off-white 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.