Umbelliferone

Description

A fluorescent dye that occurs naturally in several plants such as carrot, coriander, and belladonna. Umbelliferone is used commercially in sunscreens and fluorescent dyes. It is also used as a fluorescence indicator for metal ions such as copper and calcium.

Synonyms and Related Terms

7-hydroxycoumarin

Other Properties

Yellowish-white crystals. Soluble in hot water, ethanol

Absorbs strongly at 300, 305, 325 nm with blue fluorescence.

Used as a pH indicator for 6.5-8.9 (pKa=7.7)

Composition	C9H6O3
CAS	93-35-6
Melting Point	230
Molecular Weight	162.14

Authority

• Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Umbelliferone (Accessed Mar. 1, 2006)