(2E)-2,4-Pentadienoic acid
Also known as: 2,4-Pentadienoic acid, trans-2,4-Pentadienoic acid, Penta-2,4-dienoic acid, 1,3-Butadiene-1-carboxylic acid, Vinylacrylic acid, 1-Carboxy-1,3-butadiene, NSC 16628
(2E)-2,4-Pentadienoic acid (CAS 626-99-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H6O2 and a molecular weight of 98.09990 g/mol. Key properties include a melting point of 69-72 °C, a boiling point of 215ºC at 760 mmHg, a density of 1.039 g/cm3 and a flash point of 121.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 626-99-3
- Jingsj CID
- J-21995-4
- Molecular Formula
- C5H6O2
- Molecular Weight
- 98.09990 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 69-72 °C |
|---|---|
| Boiling Point | 215ºC at 760 mmHg |
| Density | 1.039 g/cm3 |
| Flash Point | 121.5ºC |
| Exact Mass | 98.03680 |
| PSA | 37.30000 |
| LogP | 0.81320 |
| Refractive Index | 1.474 |
| Storage Conditions | -20°C |
Frequently Asked Questions
What is the CAS number of (2E)-2,4-Pentadienoic acid?
The CAS number of (2E)-2,4-Pentadienoic acid is 626-99-3.
What are the molecular formula and molecular weight of (2E)-2,4-Pentadienoic acid?
(2E)-2,4-Pentadienoic acid has molecular formula C5H6O2 and molecular weight 98.09990 g/mol.
What are the upstream and downstream products of (2E)-2,4-Pentadienoic acid?
For (2E)-2,4-Pentadienoic acid, Upstream Products: Malonic acid, Acrolein, Carbon dioxide; Downstream Products: Methyl 2,4-pentadienoate, pent-3-enenitrile, Pentanoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(2E)-2,4-Pentadienoic acid (CAS 626-99-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21995-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.