Octafluorocyclobutane, also known as perfluorocyclobutane, is an inorganic compound with the formula C4F8. It is a colorless, non-flammable gas belonging to the haloalkane family of compounds. Here are some key facts about C4F8:

1. Molecular Structure - C4F8 consists of a cyclobutane ring with each carbon atom bonded to two fluorine atoms. This saturates the ring with the maximum number of fluorine substituents.

2. Physical Properties - C4F8 is gaseous at room temperature. It has a low boiling point of -6°C and is thermally stable up to 400°C before decomposing. The gas is colorless and has a slight ether-like odor.

3. Chemical Stability - With all C-H bonds replaced by stronger C-F bonds, C4F8 is chemically inert and non-reactive at typical temperatures. It does not undergo oxidation or hydrolysis reactions readily.

4. Applications - The inertness and dielectric properties of C4F8 make it well suited as a gaseous dielectric insulator in high voltage electrical equipment. It is also used in plasma etching processes.

5. Toxicity - C4F8 is not acutely toxic but it is an asphyxiant gas at high concentrations. Long term exposure is linked to potential developmental and reproductive toxicity effects. Strict safety precautions are required.

Octafluorocyclobutane's unique properties derive from its cyclobutane ring structure heavily substituted with fluorine atoms, making it a versatile fluorocarbon compound. However, its toxicity warrants care in handling.