2-Pentynoic acid
2-戊炔酸
Also known as: Pent-2-ynoic acid, Ethylacetylene carboxylic acid, NSC 289567, 2-Pentynoic acid (non-standard)
2-Pentynoic acid (CAS 5963-77-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H6O2 and a molecular weight of 98.09990 g/mol. It is also known as Pent-2-ynoic acid, Ethylacetylene carboxylic acid and NSC 289567. Key properties include a melting point of 48-50ºC, a boiling point of 125ºC 30mm, a density of 1.102g/cm3 and a flash point of 96ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5963-77-9
- Jingsj CID
- J-1492877-8
- Molecular Formula
- C5H6O2
- Chinese Name
- 2-戊炔酸
- Molecular Weight
- 98.09990 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 48-50ºC |
|---|---|
| Boiling Point | 125ºC 30mm |
| Density | 1.102g/cm3 |
| Flash Point | 96ºC |
GHS Safety & Compliance
Frequently Asked Questions
What is the CAS number of 2-Pentynoic acid?
The CAS number of 2-Pentynoic acid is 5963-77-9.
What are the molecular formula and molecular weight of 2-Pentynoic acid?
2-Pentynoic acid has molecular formula C5H6O2 and molecular weight 98.09990 g/mol.
Is 2-Pentynoic acid hazardous?
2-Pentynoic acid has GHS signal word Warning.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Pentynoic acid (CAS 5963-77-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1492877-8 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.