Piperazin-2-one
Also known as: 2-Oxopiperazine, 2-Ketopiperazine, 3-Oxopiperazine, Piperazine-2-one, 2-Piperazinone, NSC 27441, PIPERAZIN-2-ONE, PIPERAZINONE
Piperazin-2-one (CAS 5625-67-2) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H8N2O and a molecular weight of 100.12 g/mol. Key properties include a melting point of 136-140 °C(lit.), a boiling point of 307.1±35.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 166.3±26.1 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H317 — May cause an allergic skin reaction and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5625-67-2
- Jingsj CID
- J-4282-6
- Molecular Formula
- C4H8N2O
- Molecular Weight
- 100.12 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 136-140 °C(lit.) |
|---|---|
| Boiling Point | 307.1±35.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 166.3±26.1 °C |
| Exact Mass | 100.063660 |
| PSA | 41.13000 |
| LogP | -2.19 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.445 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H317 — May cause an allergic skin reaction
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933599090 |
|---|---|
| Summary | 2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. 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 Piperazin-2-one?
The CAS number of Piperazin-2-one is 5625-67-2.
What are the molecular formula and molecular weight of Piperazin-2-one?
Piperazin-2-one has molecular formula C4H8N2O and molecular weight 100.12 g/mol.
Is Piperazin-2-one hazardous?
Piperazin-2-one has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Piperazin-2-one?
For Piperazin-2-one, Upstream Products: ethyl chloroacetate, Diethylamine, ethyl 2-[(2-aminoethyl)amino]acetate; Downstream Products: tert-Butyl 4-methyl-3-oxopiperazine-1-carboxylate, 4-Methylpiperazin-2-one, 1-(4-Fluorophenyl)piperazin-2-one.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Piperazin-2-one (CAS 5625-67-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4282-6 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.