Antimony(III) Oxide is a chemically defined substance with the molecular formula O3Sb2 and a molecular weight of 291.52. It has a Melting Point of 655.0 °C and a Boiling Point that varies depending on pressure; it sublimes at 1550.0 °C and 870.0 °C. This compound carries a Warning signal word due to potential health risks. Further details regarding its hazards can be found in the associated data.

• CAS Number: 1309-64-4
• Melting Point: 655.0 °C
• Boiling Point: 1550.0 °C (sublimes); 870.0 °C
• Vapour Density: 5.2 at 77 °F
• Molecular Formula: O3Sb2
• GHS Signal Word: Warning
• Exact Mass: 291.79277
• Molecular Weight: 291.52
• Hazard Statements:
• H351: Suspected of causing cancer [Warning Carcinogenicity]
• H350: May cause cancer [Danger Carcinogenicity]
• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
• H303: May be harmful if swallowed [Warning Acute toxicity, oral]