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The author is not a physician. The content on this website does not, and is not intended to constitute medical advice. It should not be relied upon when making medical decisions. It is not intended as a substitute for advice from your physician or other healthcare provider.

« Fluorene (Twist or shine, choose one) | Main | Ethylene Oxide (Strained ether) »

Fluorescein (Glowing rivers)

Category: Dyes
Posted on: March 16, 2007 8:00 AM, by Molecule of the Day

Edit: Looks like I might be off on this.


If you're in Chicago, the river will be green this weekend. For that, you can thank fluorescein:


InChI=1/C20H12O5/c21-11-5-7-15-17(9-11)25-18-10-12(22)6-8-16(18)19(15)13-3-1-2-4-14(13)20(23)24/h1-10,21H,(H,23,24)/p-2

Fluorescein is strongly fluorescent - if it absorbs a photon, 97 times out of 100, it will be re-emitted as light (see yesterday's entry on fluorene for more information).

Fluorescein is a phenomenally useful fluorophore; it finds use in biology to fluorescently tag molecules, as well in medical imaging.

Happy St. Patrick's day!

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Thanks! I really like this site.

Posted by: STF | March 20, 2007 7:50 AM

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