1-Oxa-2-oxo-3-thiaindolizinium chloride
1-Oxa-2-oxo-3-thiaindolizinium chloride (CAS 89025-51-4) is a heterocyclic organic compound with the molecular formula C6H4ClNO2S and a molecular weight of 189.62 g/mol. As a building block in chemical synthesis, it is particularly relevant for creating more complex pyridines and other heterocyclic structures. Its unique chemical properties make it a valuable intermediate for research and development in various chemical fields.
- IUPAC
- 2-Oxo[1,4,2]oxathiazolo[2,3-a]pyridinium chloride
- Synonyms
- 2-Oxo[1,4,2]oxathiazolo[2,3-a]pyridinium chloride

Heterocyclic Synthesis
This compound serves as a key building block for the synthesis of diverse heterocyclic compounds, including substituted pyridines. Its structure facilitates the introduction of specific functionalities in organic molecules.
Chemical Research
Utilised in academic and industrial research laboratories for exploring novel synthetic pathways and developing new chemical entities. Its reactivity profile is of interest for fine chemical synthesis.
Intermediate for Complex Molecules
Functions as an intermediate in multi-step syntheses, enabling the construction of complex molecular architectures relevant to pharmaceutical and material science applications.
| Molecular weight | 189.62 |
|---|---|
| Empirical formula | C6H4ClNO2S |
| Melting point | 170 °C (dec.)(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1-Oxa-2-oxo-3-thiaindolizinium chloride used for?
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1-Oxa-2-oxo-3-thiaindolizinium chloride is primarily used as a building block in chemical synthesis, particularly for creating heterocyclic compounds such as pyridines, and as an intermediate in organic chemistry research.
What is the CAS number and formula for 1-Oxa-2-oxo-3-thiaindolizinium chloride?
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The CAS number is 89025-51-4 and the empirical formula is C6H4ClNO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound for research and chemical synthesis purposes. Specific assay details may vary, and it is not represented as USP, BP, or EP grade.
How should 1-Oxa-2-oxo-3-thiaindolizinium chloride be handled?
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Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves. It is classified as causing skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335), requiring careful handling in a well-ventilated area.
Is 1-Oxa-2-oxo-3-thiaindolizinium chloride a controlled substance?
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The provided data does not indicate that 1-Oxa-2-oxo-3-thiaindolizinium chloride is a controlled substance.
How is 1-Oxa-2-oxo-3-thiaindolizinium chloride packed and shipped?
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Tech Serve Solutions professionally packs and exports chemicals globally, adhering to all relevant shipping regulations for hazardous materials.
How can I request a sample or quote for 1-Oxa-2-oxo-3-thiaindolizinium chloride?
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Please contact our sales team via our website or email to request a sample or a detailed quotation.
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