2-Methyl-2-pentenal
Also known as: 2-Methylpent-2-enal, 2-Pentenal, 2-methyl-, 2-Propylidene-propionaldehyde, 2-methyl-(E)-2-pentenal, 3-Ethyl-2-methylacraldehyde, ALPHA-METHYL-BETA-ETHYL ACROLEIN, CH3CH2CH=C(CH3)CHO, EINECS 210-789-5, MFCD00006978, TRANS-2-METHYL-2-PENTENAL, beta-Ethyl-alpha-methylacrolein, α-Methyl-β-ethylacrolein, β-Ethyl-α-methylacrolein
2-Methyl-2-pentenal (CAS 623-36-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H10O and a molecular weight of 98.143 g/mol. Key properties include a melting point of -90ºC, a boiling point of 136.5±9.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 31.7±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H317 — May cause an allergic skin reaction and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 623-36-9
- Jingsj CID
- J-747-6
- Molecular Formula
- C6H10O
- Molecular Weight
- 98.143 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -90ºC |
|---|---|
| Boiling Point | 136.5±9.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 31.7±0.0 °C |
| Exact Mass | 98.073166 |
| PSA | 17.07000 |
| LogP | 1.60 |
| Vapor Pressure | 7.3±0.3 mmHg at 25°C |
| Refractive Index | 1.420 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H317 — May cause an allergic skin reaction
- H318 — Causes serious eye damage
- H331 — Toxic if inhaled
- H412 — Harmful to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of 2-Methyl-2-pentenal?
The CAS number of 2-Methyl-2-pentenal is 623-36-9.
What are the molecular formula and molecular weight of 2-Methyl-2-pentenal?
2-Methyl-2-pentenal has molecular formula C6H10O and molecular weight 98.143 g/mol.
Is 2-Methyl-2-pentenal hazardous?
2-Methyl-2-pentenal has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H317 — May cause an allergic skin reaction; H318 — Causes serious eye damage.
What are the upstream and downstream products of 2-Methyl-2-pentenal?
For 2-Methyl-2-pentenal, Downstream Products: 3-Methyl-2-pentanone, 1-Propanol, 2-Methyl-1-pentanol.
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-Methyl-2-pentenal (CAS 623-36-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-747-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.