Photograph of a caffeine molecular model, courtesy of Indigo® Instruments.
A substance found in tea, coffee, and cola that acts as a stimulant. It is extremely soluble in supercritical fluid carbon dioxide and somewhat soluble in water; aqueous solutions of caffeine quickly break down.


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Atomic / Molecular Weight 194.19 gmol-1Clip
Density 1200 kgm-3Clip
Melting Point 511 KClip
Boiling Point sublimes at 451K KClip
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Subjects: Chemistry

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Caffeine what is it and how much is safe?