2-Butynoic acid
2-丁炔酸
Also known as: Tetrolic acid, 1-Propynecarboxylic acid, 3-Methylpropiolic acid, But-2-ynoic acid, Methylacetylenecarboxylic acid
- CAS No.
- 590-93-2
- Jingsj CID
- J-5286-1
- Molecular Formula
- C4H4O2
- Chinese Name
- 2-丁炔酸
- Molecular Weight
- 84.073 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 78-80 °C(lit.) |
|---|---|
| Boiling Point | 203.0±9.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 90.9±15.2 °C |
GHS Safety & Compliance
CorrosionSignal word: Danger
Frequently Asked Questions
What is the CAS number of 2-Butynoic acid?
590-93-2
What are the molecular formula and molecular weight of 2-Butynoic acid?
C4H4O2, molecular weight 84.073 g/mol
Is 2-Butynoic acid hazardous?
Danger
Data compiled from public chemical databases and supplier catalogs; verify specifications with suppliers before purchase. · Last updated: 8/21/2026