![Molecular structure of Cyclopenta[b]pyridine (CAS 533-37-9)](/images/chem_structures_svg/308/533-37-9.svg)
Cyclopenta[b]pyridine
Also known as: 2,3-Cyclopentenopyridine, 6,7-Dihydro-5H-cyclopenta[b]pyridine, Pyrindan, 5H-1-Pyrindine, 6,7-dihydro-, 6,7-Dihydro-5H-[1]pyrindine, EINECS 208-564-1, MFCD00005933
Cyclopenta[b]pyridine (CAS 533-37-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H9N and a molecular weight of 119.164 g/mol. Key properties include a boiling point of 212.2±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 67.2±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 533-37-9
- Jingsj CID
- J-48051-3
- Molecular Formula
- C8H9N
- Molecular Weight
- 119.164 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 212.2±0.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 67.2±0.0 °C |
| Exact Mass | 119.073502 |
| PSA | 12.89000 |
| LogP | 1.85 |
| Vapor Pressure | 0.3±0.4 mmHg at 25°C |
| Refractive Index | 1.567 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of Cyclopenta[b]pyridine?
The CAS number of Cyclopenta[b]pyridine is 533-37-9.
What are the molecular formula and molecular weight of Cyclopenta[b]pyridine?
Cyclopenta[b]pyridine has molecular formula C8H9N and molecular weight 119.164 g/mol.
Is Cyclopenta[b]pyridine hazardous?
Cyclopenta[b]pyridine has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Cyclopenta[b]pyridine?
For Cyclopenta[b]pyridine, Upstream Products: Cyclopentanone, Propargylamine, 1-Pyrrolidino-1-cyclopentene; Downstream Products: 6,7-Dihydro-5H-cyclopenta[b]pyridin-7-ol, 5H-Cyclopenta[b]pyridine, 1,7-Naphthyridine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cyclopenta[b]pyridine (CAS 533-37-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48051-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.