Isobutyraldehyde
Also known as: 2-Methylpropanal, Isobutanal, 2-Methylpropionaldehyde, Isobutyric aldehyde, 2-Methyl-1-propanal, α-Methylpropionaldehyde, Valinealdehyde
Isobutyraldehyde (CAS 78-84-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H8O and a molecular weight of 72.106 g/mol. Key properties include a melting point of −65 °C(lit.), a boiling point of 67.1±8.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of -18.9±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 78-84-2
- Jingsj CID
- J-35811-2
- Molecular Formula
- C4H8O
- Molecular Weight
- 72.106 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −65 °C(lit.) |
|---|---|
| Boiling Point | 67.1±8.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | -18.9±0.0 °C |
| Exact Mass | 72.057518 |
| PSA | 17.07000 |
| LogP | 0.72 |
| Additional Property | 2.5 (vs air) |
| Vapor Pressure | 147.4±0.1 mmHg at 25°C |
| Refractive Index | 1.367 |
| Additional Property | 75 g/L (20 ºC) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
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 Isobutyraldehyde?
The CAS number of Isobutyraldehyde is 78-84-2.
What are the molecular formula and molecular weight of Isobutyraldehyde?
Isobutyraldehyde has molecular formula C4H8O and molecular weight 72.106 g/mol.
Is Isobutyraldehyde hazardous?
Isobutyraldehyde has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Isobutyraldehyde?
For Isobutyraldehyde, Upstream Products: 2-Methyl-1-propanol, Isobutyryl chloride, Isobutyric acid; Downstream Products: 3,5-Diacetyl-1,4-dihydro-2,6-dimethylpyridine, N-isobutyl-N-isopropylamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Isobutyraldehyde (CAS 78-84-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35811-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.