trans-2-pentenoic acid
Also known as: (E)-2-pentenoic acid, (2E)-pent-2-enoic acid, 2-PENTENOIC ACID, FEMA 4193, MFCD00002704, trans-pent-2-enoic acid
trans-2-pentenoic acid (CAS 13991-37-2) 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 100.11600 g/mol. Key properties include a melting point of 9-11 °C(lit.), a boiling point of 106 °C20 mm Hg(lit.), a density of 0.99 g/mL at 25 °C(lit.) and a flash point of 102 °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.
- 13991-37-2
- Jingsj CID
- J-13842-1
- Molecular Formula
- C5H8O2
- Molecular Weight
- 100.11600 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 9-11 °C(lit.) |
|---|---|
| Boiling Point | 106 °C20 mm Hg(lit.) |
| Density | 0.99 g/mL at 25 °C(lit.) |
| Flash Point | 102 °C |
| Exact Mass | 100.05200 |
| PSA | 37.30000 |
| LogP | 1.03720 |
| Vapor Pressure | 0.107mmHg at 25°C |
| Refractive Index | n20/D 1.452(lit.) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
Frequently Asked Questions
What is the CAS number of trans-2-pentenoic acid?
The CAS number of trans-2-pentenoic acid is 13991-37-2.
What are the molecular formula and molecular weight of trans-2-pentenoic acid?
trans-2-pentenoic acid has molecular formula C5H8O2 and molecular weight 100.11600 g/mol.
Is trans-2-pentenoic acid hazardous?
trans-2-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. "trans-2-pentenoic acid (CAS 13991-37-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13842-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.