1-(4-piperazin-1-ylphenyl)ethanone

Also known as: 4'-Piperazinoacetophenone, 4-Piperazinoacetophenone, 1-[4-(Piperazin-1-yl)phenyl]ethanone, 1-(4-Acetylphenyl)piperazine, 4'-(Piperazin-4-yl)acetophenone, NSC 109890, MFCD00005962, EINECS 257-332-6, BUTTPARK 62\14-24, LABOTEST-BB LT00138218, 4-Piperazinoacetophenone, 94% 25GR

1-(4-piperazin-1-ylphenyl)ethanone (CAS 51639-48-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C12H16N2O and a molecular weight of 204.268 g/mol. Key properties include a melting point of 107-110 °C(lit.), a boiling point of 382.4±27.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 185.1±23.7 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51639-48-6
Jingsj CID: J-27379-0
Molecular Formula: C₁₂H₁₆N₂O
Molecular Weight: 204.268 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	107-110 °C(lit.)
Boiling Point	382.4±27.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	185.1±23.7 °C
Exact Mass	204.126266
PSA	32.34000
LogP	0.88
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.545

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
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 1-(4-piperazin-1-ylphenyl)ethanone?

The CAS number of 1-(4-piperazin-1-ylphenyl)ethanone is 51639-48-6.

What are the molecular formula and molecular weight of 1-(4-piperazin-1-ylphenyl)ethanone?

1-(4-piperazin-1-ylphenyl)ethanone has molecular formula C12H16N2O and molecular weight 204.268 g/mol.

Is 1-(4-piperazin-1-ylphenyl)ethanone hazardous?

1-(4-piperazin-1-ylphenyl)ethanone has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 1-(4-piperazin-1-ylphenyl)ethanone?

For 1-(4-piperazin-1-ylphenyl)ethanone, Upstream Products: Piperazine, 4'-Fluoroacetophenone, 1-(4-Chlorophenyl)ethanone; Downstream Products: 1-[4-(4-methylpiperazin-1-yl)phenyl]ethanone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-(4-piperazin-1-ylphenyl)ethanone (CAS 51639-48-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27379-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.