2-Butynoic acid
- Product Name2-Butynoic acid
- CAS590-93-2
- CBNumberCB6194374
- MFC4H4O2
- MW84.07
- EINECS209-695-7
- MDL NumberMFCD00004363
- MOL File590-93-2.mol
Chemical Properties
| Melting point: | 78-80 °C (lit.) |
| Boiling point: | 200-203°C |
| Density | 0,9641 g/cm3 |
| refractive index | 1.3918 (estimate) |
| Flash point: | 200-203°C |
| storage temp. | Sealed in dry,2-8°C |
| solubility | water: soluble50mg/mL, clear to very slightly hazy, colorless to very faintly yellow |
| form | Powder |
| pka | 2.62(at 25℃) |
| color | White to yellow |
| Water Solubility | Soluble in water. Slightly soluble in methanol and chloroform. |
| BRN | 1740205 |
| InChI | 1S/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6) |
| InChIKey | LUEHNHVFDCZTGL-UHFFFAOYSA-N |
| SMILES | CC#CC(O)=O |
| CAS DataBase Reference | 590-93-2(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Butynoic acid(590-93-2) |
| EPA Substance Registry System | 2-Butynoic acid (590-93-2) |
Safety
| Symbol(GHS) |
 GHS05 |
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| Signal word | Danger | |||||||||
| Hazard statements | H314 | |||||||||
| Precautionary statements | P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | C | |||||||||
| Risk Statements | 34-20/21/22 | |||||||||
| Safety Statements | 26-27-36/37/39-45 | |||||||||
| RIDADR | UN 3261 8/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 2916190090 | |||||||||
| Storage Class | 8A - Combustible corrosive hazardous materials | |||||||||
| Hazard Classifications |
Eye Dam. 1 Skin Corr. 1B |
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| REACH Registrations | Active | |||||||||
| Limited Quantities | 1 Kg (2.2 lbs) (solid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704: |
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