2-ethynylpyridine
Also known as: 2-ethynyl pyridine, 2-pyridylacetylene, 2-pyridinylacetylene, 1-(2-pyridinyl)ethyne, ethynylpyridine, MFCD00041598
2-ethynylpyridine (CAS 1945-84-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5N and a molecular weight of 103.121 g/mol. Key properties include a melting point of 77-78ºC, a boiling point of 170.5±13.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 57.5±12.4 °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.
- 1945-84-2
- Jingsj CID
- J-1515107-2
- Molecular Formula
- C7H5N
- Molecular Weight
- 103.121 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 77-78ºC |
|---|---|
| Boiling Point | 170.5±13.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 57.5±12.4 °C |
| Exact Mass | 103.042198 |
| PSA | 12.89000 |
| LogP | 0.91 |
| Vapor Pressure | 1.9±0.3 mmHg at 25°C |
| Refractive Index | 1.543 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 2-ethynylpyridine?
The CAS number of 2-ethynylpyridine is 1945-84-2.
What are the molecular formula and molecular weight of 2-ethynylpyridine?
2-ethynylpyridine has molecular formula C7H5N and molecular weight 103.121 g/mol.
Is 2-ethynylpyridine hazardous?
2-ethynylpyridine 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 2-ethynylpyridine?
For 2-ethynylpyridine, Upstream Products: 2-(Trimethylsilylethynyl)pyridine, 2-Pyridinecarboxaldehyde, Dimethyl (1-diazo-2-oxopropyl)phosphonate; Downstream Products: 2-(2-Pyridyl)benzothiophene, 4-(Pyridin-2-yl)phenol, N,N-Dimethyl-2-(pyridin-2-yl)ethanamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-ethynylpyridine (CAS 1945-84-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1515107-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.