Antimony(III) Oxide is widely used in synthesis and formulation workflows, featuring a molecular formula of O3Sb2 and a molecular weight of 291.52 g/mol. It sublimes at 1550.0 °C under 760 mmHg pressure, while it melts at 655.0 °C. This substance requires caution due to its Warning signal word, as it may pose health risks such as suspected carcinogenicity and specific target organ toxicity upon single exposure.

• CAS Number: 1309-64-4
• Exact Mass: 291.79277
• Boiling Point: 1550.0 °C (sublimes); 870.0 °C
• Molecular Formula: O3Sb2
• Molecular Weight: 291.52
• Vapour Density: 5.2 at 77 °F
• GHS Signal Word: Warning
• Melting Point: 655.0 °C
• 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]