2-Hexynoic acid
Also known as: Hex-2-ynoic acid, MFCD00014371, 2-Hexynoic acid 96%, 2-HEXYNOIC ACID
2-Hexynoic acid (CAS 764-33-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H8O2 and a molecular weight of 112.127 g/mol. Key properties include a melting point of 23-26°C, a boiling point of 225.4±9.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 104.4±15.2 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H319 — Causes serious eye irritation and H334 — May cause allergy or asthma symptoms if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 764-33-0
- Jingsj CID
- J-42025-7
- Molecular Formula
- C6H8O2
- Molecular Weight
- 112.127 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 23-26°C |
|---|---|
| Boiling Point | 225.4±9.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 104.4±15.2 °C |
| Exact Mass | 112.052429 |
| PSA | 37.30000 |
| LogP | 1.92 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.470 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H319 — Causes serious eye irritation
- H334 — May cause allergy or asthma symptoms if inhaled
Frequently Asked Questions
What is the CAS number of 2-Hexynoic acid?
The CAS number of 2-Hexynoic acid is 764-33-0.
What are the molecular formula and molecular weight of 2-Hexynoic acid?
2-Hexynoic acid has molecular formula C6H8O2 and molecular weight 112.127 g/mol.
Is 2-Hexynoic acid hazardous?
2-Hexynoic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H319 — Causes serious eye irritation; H334 — May cause allergy or asthma symptoms if inhaled.
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-Hexynoic acid (CAS 764-33-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42025-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.