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2-Chlorocyclopentanone

Also known as: 2-Chloro-1-cyclopentanone, alpha-Chlorocyclopentanone, Cyclopentanone, 2-chloro-, NSC 60206, 2-chlorocyclopentan-1-one, 2-chloro-cyclopentanon

2-Chlorocyclopentanone (CAS 694-28-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H7ClO and a molecular weight of 118.562 g/mol. Key properties include a boiling point of 186.6±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 77.2±0.0 °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.
694-28-0
Jingsj CID
J-1367696-5
Molecular Formula
C5H7ClO
Molecular Weight
118.562 g/mol
Category
Ketones
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point186.6±0.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point77.2±0.0 °C
Exact Mass118.018539
PSA17.07000
LogP0.15
Vapor Pressure0.7±0.3 mmHg at 25°C
Refractive Index1.464

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 2-Chlorocyclopentanone?

The CAS number of 2-Chlorocyclopentanone is 694-28-0.

What are the molecular formula and molecular weight of 2-Chlorocyclopentanone?

2-Chlorocyclopentanone has molecular formula C5H7ClO and molecular weight 118.562 g/mol.

Is 2-Chlorocyclopentanone hazardous?

2-Chlorocyclopentanone has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

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

Last updated:

How to cite: Jingsj. "2-Chlorocyclopentanone (CAS 694-28-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1367696-5 (accessed 2026-11-09).

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