| Product Name | 2-Butynoic acid |
| CAS No. | 590-93-2 |
| Synonyms | 1-Propynecarboxylic acid; 3-Methylpropiolic acid; NSC 174116; Tetrolic acid; but-2-ynoic acid; but-2-ynoate |
| InChI | InChI=1/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6)/p-1 |
| Molecular Formula | C4H3O2 |
| Molecular Weight | 83.066 |
| Melting point | 74-78℃ |
| Boiling point | 203°C at 760 mmHg |
| Flash point | 90.9°C |
| Hazard Symbols |  C:Corrosive; |
| Risk Codes | R20/21/22:; R34:; |
| Safety | S26:; S36/37/39:; S45:; |
590-93-2 2-butynoic acid
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