Chemical Properties
| Melting point | -154°C (119 K); Early prepns, described as brown gas, red liq and orange solid (mp -163.5°), probably contained other fluorine-oxygen compounds as impurities: Goetschel et al., loc. cit |
| Boiling point | -56.12°C (estimate) |
| density | 3.071g/L [LID94] |
| form | gas, stable only at low temperature |
| color | red-orange solid, unstable gas |