Cyclopentadiene
Also known as: 1,3-Cyclopentadiene, 1,3-Cyclopentadiene 542-92-7 Cyclopentadiene, 1,3-Cyclopentadiene,potassium complex, 1,3-cyclopentadiene, 1，3-Cyclopentadiene, 2,4-Cyclopentadiene, Cyclopenta-1,3-diene, Cyclopentadienylpotassium, EINECS 208-835-4, JACS-542-92-7, POTASSIUM CYCLOPENTADIENIDE, Potassium,2,4-cyclopentadien-1-yl, cyclopentadienalpotassium, cyclopentadiene, cyclopentadienyl, cyclopentanediene, cyclopentdiene, pentole, pyropentylene, r-pentine
Cyclopentadiene (CAS 542-92-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H6 and a molecular weight of 66.101 g/mol. Key properties include a melting point of -97.2ºC, a boiling point of 41.5±0.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of -32.2±13.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 542-92-7
- Jingsj CID
- J-29024-7
- Molecular Formula
- C5H6
- Molecular Weight
- 66.101 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -97.2ºC |
|---|---|
| Boiling Point | 41.5±0.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | -32.2±13.0 °C |
| Exact Mass | 66.046951 |
| LogP | 1.79 |
| Vapor Pressure | 418.5±0.0 mmHg at 25°C |
| Refractive Index | 1.503 |
Frequently Asked Questions
What is the CAS number of Cyclopentadiene?
The CAS number of Cyclopentadiene is 542-92-7.
What are the molecular formula and molecular weight of Cyclopentadiene?
Cyclopentadiene has molecular formula C5H6 and molecular weight 66.101 g/mol.
What are the upstream and downstream products of Cyclopentadiene?
For Cyclopentadiene, Upstream Products: 3a,4,7,7a-tetrahydro-1H-indene, Tricyclo[5.2.1.02,6]deca-3,8-diene, Cyclopentene; Downstream Products: Ethyl 5-norbornene-2-carboxylate, 2-Benzyl-2-azabicyclo[2.2.1]hept-5-ene, 2-Benzoyl-5-norbornene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cyclopentadiene (CAS 542-92-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29024-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.