Isobutylene
Also known as: 1,1-Dimethylethylene, 1,1-dimethylethene, 1-PROPENE, 2-METHYL-, 1-Propene,2-methyl, 2-METHYLPROPENE, 2-Methyl-1-propene, 2-Methylpropene-isobutylene, 2-Methylpropylene, 2-methyl-1-propen, 2-methyl-propen, 2-methylprop-1-ene, EINECS 204-066-3, HP-ISOBUTYLENE, ISOBUTENE, ISOBUTYLENE, Isobutene, MFCD00008898, Methylpropene, Propene,2-methyl
Isobutylene (CAS 115-11-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H8 and a molecular weight of 56.10630 g/mol. Key properties include a melting point of −140 °C, a boiling point of −6.9 °C(lit.), a density of 0.5879 and a flash point of -80 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 115-11-7
- Jingsj CID
- J-1439272-8
- Molecular Formula
- C4H8
- Molecular Weight
- 56.10630 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −140 °C |
|---|---|
| Boiling Point | −6.9 °C(lit.) |
| Density | 0.5879 |
| Flash Point | -80 °C |
| Exact Mass | 56.06260 |
| LogP | 1.58240 |
| Additional Property | 2 (vs air) |
| Vapor Pressure | 3278 mm Hg ( 37.7 °C) |
| Refractive Index | 1.3811 |
| Additional Property | -140.34℃ |
Customs & Trade Information
| HS Code | 2901233000 |
|---|---|
| Summary | 2901233000 2-methylprop-1-ene。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。Lowest tariff:2.0%。General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Isobutylene?
The CAS number of Isobutylene is 115-11-7.
What are the molecular formula and molecular weight of Isobutylene?
Isobutylene has molecular formula C4H8 and molecular weight 56.10630 g/mol.
What are the upstream and downstream products of Isobutylene?
For Isobutylene, Downstream Products: TERT-BUTYLTOLUENE, Methallyl isothiocyanate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Isobutylene (CAS 115-11-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1439272-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.