Caffeine, with the molecular formula C8H10N4O2 and a Molecular Weight of 194.19 g/mol, is a nitrogen heterocycle and carboxylic acid imide classified under Other reference substances for HPLC. It has a Melting Point of 460 °F and boils at 352 °F when under 760 mmHg pressure. Caffeine is denser than water and will sink. It is recommended to use safety goggles and follow the Precept label when handling this substance due to its potential hazards.

• CAS Number: 58-08-2
• Molecular Formula: C8H10N4O2
• Molecular Weight: 194.19
• Exact Mass: 194.08037557
• Boiling Point: 352 °F at 760 mmHg (sublimes) (NTP, 1992)
• Melting Point: 460 °F (NTP, 1992)
• Density: 1.23 at 64 °F (NTP, 1992) - Denser than water; will sink
• GHS Signal Word: Warning
• Hazard Statements:
• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H301: Toxic if swallowed [Danger Acute toxicity, oral]