Acetylenedicarboxylic acid
- Product NameAcetylenedicarboxylic acid
- CAS142-45-0
- CBNumberCB0334392
- MFC4H2O4
- MW114.06
- EINECS205-536-0
- MDL NumberMFCD00004362
- 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) |
| EPA Substance Registry System | 2-Butynedioic acid (142-45-0) |
Safety
| Symbol(GHS) |
 GHS06 |
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| Signal word | Danger | |||||||||
| Hazard statements | H301-H315-H319-H335 | |||||||||
| Precautionary statements | P261-P264-P270-P301+P310-P302+P352-P305+P351+P338 | |||||||||
| target organs | Respiratory system | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges | |||||||||
| 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 | 2917190090 | |||||||||
| Storage Class |
6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
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| Hazard Classifications |
Acute Tox. 3 Oral Eye Irrit. 2 Skin Irrit. 2 STOT SE 3 |
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| NFPA 704: |
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