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**Molecular formula:** O₃ **Molar mass:** 48 g/mol **Description:** Ozone is a toxic, colorless gas with a distinctive bluish tint. In its liquid state, ozone is blue in color, and in its solid form, it is black to violet. **Applications:** Ozone is used as an oxidizing agent and has excellent disinfectant properties. **Occurrence:** Ozone is naturally present in the upper atmosphere, with the highest concentrations found in the ozone layer at an altitude of approximately 25 km above the Earth's surface. The ozone layer protects living organisms from harmful ultraviolet radiation from the sun.
