3-Bromo-2H-pyran-2-one
Also known as: 2H-Pyran-2-one, 3-bromo-, 3-Bromo-2-pyrone, 3-Bromo-α-pyrone, 3-bromopyran-2-one
3-Bromo-2H-pyran-2-one (CAS 19978-32-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H3BrO2 and a molecular weight of 174.98000 g/mol. Key properties include a melting point of 64-66 °C, a boiling point of 261.1±33.0 °C(Predicted) and a density of 1.882±0.06 g/cm3(Predicted). No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19978-32-6
- Jingsj CID
- J-1521256-3
- Molecular Formula
- C5H3BrO2
- Molecular Weight
- 174.98000 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 64-66 °C |
|---|---|
| Boiling Point | 261.1±33.0 °C(Predicted) |
| Density | 1.882±0.06 g/cm3(Predicted) |
| Exact Mass | 173.93200 |
| PSA | 30.21000 |
| LogP | 1.40230 |
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 3-Bromo-2H-pyran-2-one?
The CAS number of 3-Bromo-2H-pyran-2-one is 19978-32-6.
What are the molecular formula and molecular weight of 3-Bromo-2H-pyran-2-one?
3-Bromo-2H-pyran-2-one has molecular formula C5H3BrO2 and molecular weight 174.98000 g/mol.
What are the upstream and downstream products of 3-Bromo-2H-pyran-2-one?
For 3-Bromo-2H-pyran-2-one, Upstream Products: 3,5-Dibromo-5,6-dihydro-2H-pyran-2-one, alpha-pyrone, 5,6-Dihydro-2H-pyran-2-one; Downstream Products: alpha-pyrone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Bromo-2H-pyran-2-one (CAS 19978-32-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1521256-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.