4-Cyano-1-butyne
Also known as: 4-Cyanobut-1-yne, 4-Pentynenitrile, Pent-4-ynenitrile, 1-Cyano-3-butyne, Pent-4-innitril
4-Cyano-1-butyne (CAS 19596-07-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H5N and a molecular weight of 79.09990 g/mol. Key properties include a boiling point of 169ºC at 760mmHg, a density of 0.896g/cm3 and a flash point of 55.4ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19596-07-7
- Jingsj CID
- J-1393743-0
- Molecular Formula
- C5H5N
- Molecular Weight
- 79.09990 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 169ºC at 760mmHg |
|---|---|
| Density | 0.896g/cm3 |
| Flash Point | 55.4ºC |
| Exact Mass | 79.04220 |
| PSA | 23.79000 |
| LogP | 0.92338 |
| Vapor Pressure | 1.58mmHg at 25°C |
| Refractive Index | 1.433 |
GHS Safety & Compliance
- H301 — Toxic if swallowed
Customs & Trade Information
| HS Code | 2926909090 |
|---|---|
| Summary | HS:2926909090 other nitrile-function compounds VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Cyano-1-butyne?
The CAS number of 4-Cyano-1-butyne is 19596-07-7.
What are the molecular formula and molecular weight of 4-Cyano-1-butyne?
4-Cyano-1-butyne has molecular formula C5H5N and molecular weight 79.09990 g/mol.
Is 4-Cyano-1-butyne hazardous?
4-Cyano-1-butyne has GHS signal word Danger and hazard statements H301 — Toxic if swallowed.
What are the upstream and downstream products of 4-Cyano-1-butyne?
For 4-Cyano-1-butyne, Upstream Products: 4-Bromo-1-butyne, but-3-ynyl 4-methylbenzenesulfonate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Cyano-1-butyne (CAS 19596-07-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1393743-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.