3-Methyl-2-butenal
Also known as: 3,3-Dimethylacrolein, 3-Methylcrotonaldehyde, Senecialdehyde, β,β-Dimethylacrolein, β-Methylcrotonaldehyde, 3-Methylbut-2-enal, 3,3-Dimethylacrylaldehyde, Prenal
3-Methyl-2-butenal (CAS 107-86-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8O and a molecular weight of 84.116 g/mol. Key properties include a melting point of -20°C, a boiling point of 134.0±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 33.9±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, 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.
- 107-86-8
- Jingsj CID
- J-8189-0
- Molecular Formula
- C5H8O
- Molecular Weight
- 84.116 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -20°C |
|---|---|
| Boiling Point | 134.0±0.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 33.9±0.0 °C |
| Exact Mass | 84.057518 |
| PSA | 17.07000 |
| LogP | 1.07 |
| Vapor Pressure | 8.3±0.2 mmHg at 25°C |
| Refractive Index | 1.411 |
| Additional Property | soluble |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
- H317 — May cause an allergic skin reaction
- H331 — Toxic if inhaled
Customs & Trade Information
| HS Code | 2912190090 |
|---|---|
| Summary | 2912190090 acyclic aldehydes without other oxygen function。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Methyl-2-butenal?
The CAS number of 3-Methyl-2-butenal is 107-86-8.
What are the molecular formula and molecular weight of 3-Methyl-2-butenal?
3-Methyl-2-butenal has molecular formula C5H8O and molecular weight 84.116 g/mol.
Is 3-Methyl-2-butenal hazardous?
3-Methyl-2-butenal has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; 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. "3-Methyl-2-butenal (CAS 107-86-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8189-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.