Ozone (O₃) does not have a traditional melting or boiling point like other substances. This is because ozone decomposes into oxygen before it can reach either of those states.

Here's a breakdown:

* Decomposition: Ozone is a highly unstable molecule and readily decomposes into diatomic oxygen (O₂) at temperatures above -111.9 °C (-169.4 °F).

* Sublimation: As a result of this decomposition, ozone skips the liquid state and transitions directly from solid to gas, a process called sublimation.

Therefore, instead of a melting or boiling point, ozone has a sublimation point of -192.7 °C (-314.9 °F).

Keep in mind that these temperatures are for pure ozone under standard atmospheric pressure. The actual decomposition and sublimation points can vary depending on factors like pressure and the presence of other substances.