PRODUCT Properties
| Melting point: | 42-45 °C (lit.) |
| Boiling point: | 133-135 °C/10 mmHg (lit.) |
| Density | 1.2667 (rough estimate) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | under inert gas (nitrogen or Argon) at 2-8°C |
| form | solid |
| Appearance | Colorless to off-white Solid-liquid mixture |
| BRN | 123650 |
| InChI | 1S/C7H6O3/c8-6-4-2-1-3-5(4)7(9)10-6/h1-3H2 |
| InChIKey | GBBPFLCLIBNHQO-UHFFFAOYSA-N |
| SMILES | O=C1OC(=O)C2=C1CCC2 |
Description and Uses
Valuable Diels-Alder dienophile, for example, in approach to the bicycloundecane system in taxanes.
Safety
| Symbol(GHS) | ![]() GHS07 |
| Signal word | Warning |
| Hazard statements | H315-H319-H335 |
| Precautionary statements | P261-P305+P351+P338 |
| target organs | Respiratory system |
| PPE | dust mask type N95 (US), Eyeshields, Gloves |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| WGK Germany | 3 |
| F | 21 |
| Storage Class | 11 - Combustible Solids |
| Hazard Classifications | Eye Irrit. 2 Skin Irrit. 2 STOT SE 3 |

![5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione](https://img.chemicalbook.com/CAS/GIF/3205-94-5.gif)





