Description

1,3,4-Oxathiazole-5-Carboxylic Acid, 2-Oxo-, Ethyl Ester is a specialized heterocyclic building block of significant interest in advanced organic synthesis. Its unique oxathiazole core structure makes it a valuable precursor for developing novel pharmacologically active compounds and functional materials. This high-purity intermediate is primarily sought by research and development teams in the pharmaceutical, agrochemical, and material science industries for creating new molecules with targeted properties.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new active pharmaceutical ingredients (APIs), particularly those containing sulfur and nitrogen heterocycles.
• Agrochemical Synthesis: Used in the discovery and production of novel herbicides, fungicides, and insecticides, leveraging its reactive ester and heterocyclic functionalities.
• Material Science Research: Serves as a building block for creating advanced polymers, ligands for catalysis, or organic electronic materials due to its conjugated system potential.
• Chemical Biology Probes: Employed in the synthesis of specialized probes and inhibitors for studying enzymatic activity and biological pathways.
• Custom Synthesis & Contract Manufacturing: A critical starting material for custom synthesis projects and contract research organizations (CROs/CMOs) serving the life sciences sector.

Basic Information

Product Name	1,3,4-Oxathiazole-5-Carboxylic Acid, 2-Oxo-, Ethyl Ester
CAS No.	61689-40-5
Molecular Formula	C6H5NO4S
Molecular Weight	187.17 g/mol
Synonyms	Ethyl 2-oxo-1,3,4-oxathiazole-5-carboxylate; 5-Ethoxycarbonyl-1,3,4-oxathiazol-2-one; 1,3,4-Oxathiazole-5-carboxylic acid, 2-oxo-, ethyl ester; Ethyl 2-oxo-2,5-dihydro-1,3,4-oxathiazole-5-carboxylate; Oxathiazole ethyl ester; 61689-40-5 (CAS); 5-Carbethoxy-1,3,4-oxathiazol-2-one
EINECS	Contact for details

Quality Control

Our production of 1,3,4-Oxathiazole-5-Carboxylic Acid, 2-Oxo-, Ethyl Ester adheres to stringent in-process controls to ensure batch-to-batch consistency and high chemical purity. Every lot is fully characterized and tested against comprehensive specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting identity, purity, and impurity profiles as determined by advanced analytical techniques.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. For long-term storage under inert atmosphere, please contact our technical team for specific recommendations.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Reported value ± 2°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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