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2-cyclopentene-1-acetic acid

Also known as: (2-cyclopentenyl)acetic acid, 2-cyclopent-2-en-1-ylacetic acid, cyclopent-2-enylacetic acid, 2-cyclopenteneacetic acid, 2-(cyclopent-2-enyl)acetic acid, cyclopent-2-en-1-ylacetic acid, 2-cyclopenten-1-ylacetic acid

2-cyclopentene-1-acetic acid (CAS 13668-61-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H10O2 and a molecular weight of 126.15300 g/mol. Key properties include a melting point of 19ºC(lit.), a boiling point of 93-94ºC2.5 mm Hg(lit.), a density of 1.047 g/mL at 25ºC(lit.) and a flash point of >110.0 °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 Nov 3, 2026.

CAS No.
13668-61-6
Jingsj CID
J-26506-5
Molecular Formula
C7H10O2
Molecular Weight
126.15300 g/mol
Category
Organic Acids
Last updated
11/3/2026

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Physicochemical Properties

Melting Point19ºC(lit.)
Boiling Point93-94ºC2.5 mm Hg(lit.)
Density1.047 g/mL at 25ºC(lit.)
Flash Point>110.0 °C
Exact Mass126.06800
PSA37.30000
LogP1.42730
Vapor Pressure0.0148mmHg at 25°C
Refractive Indexn20/D 1.468(lit.)

GHS Safety & Compliance

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

Customs & Trade Information

HS Code2916209090
Summary2916209090 other cyclanic, cyclenic or cyclotherpenic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2-cyclopentene-1-acetic acid?

The CAS number of 2-cyclopentene-1-acetic acid is 13668-61-6.

What are the molecular formula and molecular weight of 2-cyclopentene-1-acetic acid?

2-cyclopentene-1-acetic acid has molecular formula C7H10O2 and molecular weight 126.15300 g/mol.

Is 2-cyclopentene-1-acetic acid hazardous?

2-cyclopentene-1-acetic acid 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-cyclopentene-1-acetic acid (CAS 13668-61-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26506-5 (accessed 2026-11-09).

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