Selenium Dioxide is part of a category of reagents recognized for technical precision, characterized by the molecular formula O2Se and a Molecular Weight of 110.97 g/mol. This compound exhibits a Boiling Point of 315.0 °C (sublimes), and a Melting Point of 340 °C under pressure. The hazard signal word associated with Selenium Dioxide is Danger due to its acute oral toxicity.

• CAS Number: 7446-08-4
• Exact Mass: 111.90635
• Molecular Weight: 110.97
• Molecular Formula: O2Se
• Boiling Point: 315.0 °C (sublimes)
• GHS Signal Word: Danger
• Melting Point: 340 °C under pressure
• Vapour Density: 3.95 at 68 °F
• Hazard Statements:
• H300: Fatal if swallowed [Danger Acute toxicity, oral]