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As fluorescein solution changes its color depending on concentration, [26] it has been used as a tracer in evaporation experiments. One of its more recognizable uses was in the Chicago River, where fluorescein was the first substance used to dye the river green on St. Patrick's Day in 1962. In 1966, environmentalists forced a change to a ...
[7] [3] When used by mouth or injection, side effects may include headache, nausea, and a change to the color of the skin for a brief period of time. [3] Allergic reactions may rarely occur. [3] Fluorescein is a dye which is taken up by damaged cornea such that the area appears green under cobalt blue light. [3]
Fluorescein: Solvent yellow 94 45350 fluorone 2321-07-5: Food orange 7: Food orange 7 40825 carotenoid 1109-11-1: Fuchsine: Basic fuchsin Rosalinin Magenta I Basic violet 14 42510 triarylmethane 632-99-5: Gallamin blue Mordant blue 45 51045 oxazin 1563-02-6: Gallocyanin: Mordant blue 10 51030 oxazin 1562-85-2: Gossypetin: 75750 natural 489-35-0 ...
The visual field in the photic zone is naturally blue, so colors of fluorescence can be detected as bright reds, oranges, yellows, and greens. Green is the most commonly found color in the marine spectrum, yellow the second most, orange the third, and red is the rarest.
Calcein, also known as fluorexon, fluorescein complex, is a fluorescent dye with excitation and emission wavelengths of 495 and 515 nm, respectively, and has the appearance of orange crystals. Calcein self- quenches at concentrations above 70 mM and is commonly used as an indicator of lipid vesicle leakage.
Dichlorofluorescein (DCF) is an organic dye of the fluorescein family, being substituted at the 2 and 7 positions by chloride. It is used as an indicator for argentometry by Fajans method. [1] [2] When used as an indicator, upon reaching the equivalence point of a titration reaction the color shifts from colorless towards a faint pink.
The Food and Drug Administration (FDA) has revoked the use of Red Dye No. 3 (also known as erythrosine, Red Dye 3, FD&C Red No. 3 and Red No. 3) in food and ingested drugs as of January 15 ...
Fluorescein in ammonia solution (2) Fluorescent dyes are often used in situations where there is insufficient lighting (e.g., sewers or cave waters), and where precise quantitative data are required (measured by a fluorometer). In 1871, fluorescein was among the first fluorescent dyes to be developed