fluorescein(redirected from resorcinol phthalic anhydride)
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fluo·res·ce·in(flo͝o-rĕs′ē-ĭn, flô-, flō-)
An orange-red compound, C20H12O5, that exhibits intense fluorescence in alkaline solution and is used in medicine for diagnostic purposes, in oceanography as a tracer, and as a textile dye.
(Elements & Compounds) an orange-red crystalline compound that in aqueous solution exhibits a greenish-yellow fluorescence in reflected light and is reddish-orange in transmitted light: used as a marker in sea water and as an indicator. Formula: C20H12O5
fluo•res•ce•in(flʊˈrɛs i ɪn, flɔ-, floʊ-)
a red crystalline compound, C20H12O5, that in alkaline solutions produces an intense green fluorescence: used as a tracer and in dyes.
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|Noun||1.||fluorescein - a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)|
solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
absorption indicator - an indicator used in reactions that involve precipitation