4-Pentenoic acid
Also known as: Allylacetic acid, 3-Vinylpropionic acid, Pent-4-enoic acid, 4-Pentenoic acid, 4-Pentensäure
4-Pentenoic acid (CAS 591-80-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H8O2 and a molecular weight of 100.116 g/mol. Key properties include a melting point of 54-57 °C(lit.), a boiling point of 188.5±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 89.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 591-80-0
- Jingsj CID
- J-26093-5
- Molecular Formula
- C5H8O2
- Molecular Weight
- 100.116 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 54-57 °C(lit.) |
|---|---|
| Boiling Point | 188.5±0.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 89.4±0.0 °C |
| Exact Mass | 100.052429 |
| PSA | 37.30000 |
| LogP | 0.99 |
| Additional Property | >1 (vs air) |
| Vapor Pressure | 0.3±0.7 mmHg at 25°C |
| Refractive Index | 1.439 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|
Customs & Trade Information
| HS Code | 29161980 |
|---|
Frequently Asked Questions
What is the CAS number of 4-Pentenoic acid?
The CAS number of 4-Pentenoic acid is 591-80-0.
What are the molecular formula and molecular weight of 4-Pentenoic acid?
4-Pentenoic acid has molecular formula C5H8O2 and molecular weight 100.116 g/mol.
Is 4-Pentenoic acid hazardous?
4-Pentenoic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Pentenoic acid (CAS 591-80-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26093-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.