685-63-2
hexafluorobutadiene-1,3
CAS: 685-63-2
Molecular Formula: C4F6
685-63-2 - Names and Identifiers
685-63-2 - Physico-chemical Properties
| Molecular Formula | C4F6 |
| Molar Mass | 162.03 |
| Density | 1.553 |
| Melting Point | -132°C |
| Boling Point | 6-7°C |
| Water Solubility | 230.5mg/L at 20℃ |
| Vapor Presure | 176.8kPa at 20℃ |
| Refractive Index | 1.378 |
685-63-2 - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | 11 - Highly Flammable |
| Safety Description | S16 - Keep away from sources of ignition. S23 - Do not breathe vapour. S33 - Take precautionary measures against static discharges. |
| UN IDs | 3161 |
| Hazard Note | Flammable |
685-63-2 - Reference Information
| LogP | 2.24 at 25℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Hexafluorobutadiene, also known as perfluorobutadiene, was originally synthesized as a polymer monomer, but its polymer performance is poor, No further research and application. In recent years, the application of hexafluorobutadiene has mainly focused on its use as an electron etching gas. |
| Synthesis method | Octafluorodibromo (iodine) butane method: Octafluorodibromobutane or octafluorodiiobutane can be directly obtained by dehalogenating with butyllithium. The yield can reach 97%, but due to the dangerous and expensive butyl lithium, this method is not practical. Later researchers' research on the dehalogenation process of octafluorodibromo (iodine) butane mainly focused on the use of zinc, magnesium metal and its additives, solvents, etc., and achieved good results. Octafluorodibromo (iodine) butane can be obtained by reacting tetrafluorodibromo (iodine) ethane with tetrafluoroethylene and tetrafluoroethylene. |
Last Update：2024-04-09 21:04:16
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