isoprene
Also known as: 2-METHYL-1,3-BUTADIENE, 2-METHYL-1,3-HEXADIENE, 2-METHYL-BUTA-1,3-DIENE, 2-methyl-1,3-butadiene, 2-methyl-buta-1,3-diene, 2-methylethene, 3-methyl-1,2-butadiene, ACETATE BUFFER, ACETATE BUFFER, PH 4.5, BUFFER ACETATE, BUFFER PH7.20, EINECS 201-143-3, Isopentadiene, Isoprene, MFCD00137248, SODIUM ACETATE ACETIC ACID, SODIUM ACETATE ACETIC ACID BUFFER, SODIUM ACETATE BUFFER, Vita-crop, decyclo-C5
isoprene (CAS 78-79-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8 and a molecular weight of 68.117 g/mol. Key properties include a melting point of -146 ºC, a boiling point of 34 ºC, a density of 0.68 and a flash point of -48 ºC. It is classified under GHS with signal word Danger and hazard statements H224, H341 — Suspected of causing genetic defects and H350 — May cause cancer. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 78-79-5
- Jingsj CID
- J-1991960-5
- Molecular Formula
- C5H8
- Molecular Weight
- 68.117 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -146 ºC |
|---|---|
| Boiling Point | 34 ºC |
| Density | 0.68 |
| Flash Point | -48 ºC |
| Exact Mass | 68.062599 |
| LogP | 2.41 |
| Additional Property | 2.35 (vs air) |
| Vapor Pressure | 549.0±0.0 mmHg at 25°C |
| Refractive Index | 1.400 |
| Additional Property | 0.07 g/100 mL |
| Additional Property | -145.96℃ |
GHS Safety & Compliance
- H224
- H341 — Suspected of causing genetic defects
- H350 — May cause cancer
- H411 — Toxic to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 4002601000 |
|---|
Frequently Asked Questions
What is the CAS number of isoprene?
The CAS number of isoprene is 78-79-5.
What are the molecular formula and molecular weight of isoprene?
isoprene has molecular formula C5H8 and molecular weight 68.117 g/mol.
Is isoprene hazardous?
isoprene has GHS signal word Danger and hazard statements H224; H341 — Suspected of causing genetic defects; H350 — May cause cancer.
What are the upstream and downstream products of isoprene?
For isoprene, Upstream Products: 2-Metbut-1-en-1yne, 3-Methyl-2-buten-1-ol, Formaldehyde.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "isoprene (CAS 78-79-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991960-5 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.