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(S)-3-methylpiperazin-2-one

(S)-3-甲基哌嗪-2-酮

Also known as: (3S)-3-methylpiperazin-2-one, (S)-3-methyl-2-ketopiperazine, (S)-3-methyl-2-oxo-piperazine, (S)-3-Methyl-2-piperazinone, 2-Piperazinone, 3-methyl-, (3S)-

(S)-3-methylpiperazin-2-one (CAS 78551-38-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H10N2O and a molecular weight of 114.14600 g/mol. It is also known as (3S)-3-methylpiperazin-2-one, (S)-3-methyl-2-ketopiperazine and (S)-3-methyl-2-oxo-piperazine. Key properties include a boiling point of 289.6ºC at 760 mmHg, a density of 0.992g/cm3 and a flash point of 148.7ºC. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
78551-38-9
Jingsj CID
J-937754-5
Molecular Formula
C5H10N2O
Chinese Name
(S)-3-甲基哌嗪-2-酮
Molecular Weight
114.14600 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point289.6ºC at 760 mmHg
Density0.992g/cm3
Flash Point148.7ºC

GHS Safety & Compliance

Health HazardSignal word: Danger

Frequently Asked Questions

What is the CAS number of (S)-3-methylpiperazin-2-one?

The CAS number of (S)-3-methylpiperazin-2-one is 78551-38-9.

What are the molecular formula and molecular weight of (S)-3-methylpiperazin-2-one?

(S)-3-methylpiperazin-2-one has molecular formula C5H10N2O and molecular weight 114.14600 g/mol.

Is (S)-3-methylpiperazin-2-one hazardous?

(S)-3-methylpiperazin-2-one has GHS signal word Danger.

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

Last updated:

How to cite: Jingsj. "(S)-3-methylpiperazin-2-one (CAS 78551-38-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-937754-5 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.