6-Chloropyran-2H-one
6-Chloropyran-2H-one (CAS: 20357-65-7, C5H3ClO2) is a halogenated heterocyclic compound with a molecular weight of 130.53 g/mol. Supplied with an assay of 97%, this pyran derivative serves as a valuable building block in chemical synthesis. Its properties make it suitable for research and development applications within the pharmaceutical and fine chemical sectors, enabling the creation of more complex molecular structures.
- IUPAC
- 6-Chloropyran-2-one

Organic Synthesis Intermediate
6-Chloropyran-2H-one acts as a versatile intermediate in the synthesis of various organic compounds. Its reactive sites allow for functional group transformations, aiding in the construction of complex molecular architectures.
Heterocyclic Chemistry
As a halogenated pyran derivative, this compound is useful in the study and synthesis of heterocyclic systems. It provides a scaffold for introducing specific functionalities or modifying existing ring structures.
Research and Development
This chemical is employed in research laboratories for exploring novel synthetic pathways and developing new chemical entities. Its defined purity supports reproducible experimental outcomes.
| Molecular weight | 130.53 |
|---|---|
| Empirical formula | C5H3ClO2 |
| Assay | 97% |
| Boiling point | 193-194 °C(lit.) |
| Density | 1.356 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5560(lit.) |

Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | >110 °C / >230 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36-43 |
| Safety statements (S) | 26-36/37-45 |
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 6-Chloropyran-2H-one used for?
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6-Chloropyran-2H-one is primarily used as a building block and intermediate in organic synthesis, particularly within heterocyclic chemistry and for research and development purposes.
What is the CAS number and formula for 6-Chloropyran-2H-one?
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The CAS number for 6-Chloropyran-2H-one is 20357-65-7, and its empirical formula is C5H3ClO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 6-Chloropyran-2H-one with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated.
How should 6-Chloropyran-2H-one be handled safely?
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6-Chloropyran-2H-one is classified with Warning (GHS07) and carries hazard statements H302 (Harmful if swallowed), H317 (May cause an allergic skin reaction), and H319 (Causes serious eye irritation). Always use appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling instructions.
Is 6-Chloropyran-2H-one a controlled substance?
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Based on the provided data, 6-Chloropyran-2H-one is not indicated as a controlled substance.
How is 6-Chloropyran-2H-one packed, shipped, and exported?
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Tech Serve Solutions packs, ships, and exports chemicals in compliance with all relevant international regulations, ensuring secure and appropriate packaging for global transit.
How can I request a sample or quote for 6-Chloropyran-2H-one?
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To request a sample or a quotation for 6-Chloropyran-2H-one, please contact our sales team through the website or by calling us directly.
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