1,2,4-Triazol-5-one
1,2,4-三唑-5-酮
Also known as: 3H-1,2,4-Triazol-3-one
1,2,4-Triazol-5-one (CAS 42131-33-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C2HN3O and a molecular weight of 83.049 g/mol. It is also known as 3H-1,2,4-Triazol-3-one. Key properties include a melting point of 235-237ºC, a boiling point of 108.6±23.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 27.1±28.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 42131-33-9
- Jingsj CID
- J-1522577-9
- Molecular Formula
- C2HN3O
- Chinese Name
- 1,2,4-三唑-5-酮
- Molecular Weight
- 83.049 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 235-237ºC |
|---|---|
| Boiling Point | 108.6±23.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 27.1±28.0 °C |
Frequently Asked Questions
What is the CAS number of 1,2,4-Triazol-5-one?
The CAS number of 1,2,4-Triazol-5-one is 42131-33-9.
What are the molecular formula and molecular weight of 1,2,4-Triazol-5-one?
1,2,4-Triazol-5-one has molecular formula C2HN3O and molecular weight 83.049 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,2,4-Triazol-5-one (CAS 42131-33-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1522577-9 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.