Acetylenedicarboxylic acid
- Product NameAcetylenedicarboxylic acid
- CAS142-45-0
- MFC4H2O4
- MW114.06
- EINECS205-536-0
- MOL File142-45-0.mol
Chemical Properties
| Melting point | 180-187 °C (dec.) (lit.) |
| Boiling point | 133.5°C (rough estimate) |
| Density | 1.1794 (rough estimate) |
| bulk density | 550kg/m3 |
| refractive index | 1.5260 (estimate) |
| Flash point | 131 °C |
| storage temp. | 2-8°C |
| solubility | Methanol (Slightly), Water |
| pka | pK1: 1.75; pK2: 4.40 (25°C) |
| form | Crystalline Powder or Crystals |
| color | White or cream to beige |
| Water Solubility | soluble |
| BRN | 878357 |
| InChI | 1S/C4H2O4/c5-3(6)1-2-4(7)8/h(H,5,6)(H,7,8) |
| InChIKey | YTIVTFGABIZHHX-UHFFFAOYSA-N |
| SMILES | OC(=O)C#CC(O)=O |
| CAS DataBase Reference | 142-45-0(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Butynedioic acid(142-45-0) |
Safety Information
| Hazard Codes | T,Xi |
| Risk Statements | 25-36/37/38 |
| Safety Statements | 26-45-37/39 |
| RIDADR | UN 2811 6.1/PG 3 |
| WGK Germany | 3 |
| TSCA | TSCA listed |
| HazardClass | 6.1 |
| PackingGroup | II |
| HS Code | 29171990 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| Hazard Classifications | Acute Tox. 3 Oral Eye Irrit. 2 Skin Irrit. 2 STOT SE 3 |
